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Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Numerical Simulation of Impact Rollers for Estimating the Influence Depth of Soil Compaction  

E-Print Network [OSTI]

these rollers. Hence, this study will focus on a geotechnical modeling that describes the behavior of soils during ground compaction using various impact rollers (e.g., triangular, Landpac 3-sided, Landpac 5-sided, and octagonal shapes). In addition, this study...

Kim, Kukjoo

2011-10-21T23:59:59.000Z

2

Machine integrated compaction monitoring technologies for self-propelled non-vibratory impact rollers.  

E-Print Network [OSTI]

??In this study, prototype machine integrated compaction monitoring technologies were evaluated for self-propelled non-vibratory soil compactors. Monitoring technologies included roller walkout, rolling radius, machine energy,… (more)

Fleming, Bradley Jon

2009-01-01T23:59:59.000Z

3

Design and Application of Low Compaction Energy Concrete for  

E-Print Network [OSTI]

Design and Application of Low Compaction Energy Concrete for Use in Slip-form Concrete Paving of cement pastes and the green strength of concretes Slipform self-consolidating concrete (SFSCC) requires sufficient flowability in order to consolidate without the use of internal vibration. However, this concrete

4

Design and Application of Low Compaction Energy Concrete for Use in Slip-form Concrete  

E-Print Network [OSTI]

Design and Application of Low Compaction Energy Concrete for Use in Slip-form Concrete Paving for the contents or use thereof. #12;1 Optimization of Self-Consolidating Concrete for Slip-form pavement A thesis-form process. Various mix designs based on the concept of Self-Consolidated Concrete were studied, so

5

CONCRETE OPTIMISATION WITH REGARD TO PACKING DENSITY AND RHEOLOGY  

E-Print Network [OSTI]

/organizers): .............. Keywords: packing density, rheology, grading curve, optimisation, self-compacting concrete, roller-compactedCONCRETE OPTIMISATION WITH REGARD TO PACKING DENSITY AND RHEOLOGY François de Larrard LCPC Centre concrete. Author contacts Authors E-Mail Fax Postal address LCPC Centre de Nantes François de Larrard

Paris-Sud XI, Université de

6

Mechanical properties of self-compacting concrete reinforced with polypropylene fibres  

E-Print Network [OSTI]

Mechanical properties of self-compacting concrete reinforced with polypropylene fibres O. Gencel*1 of workability. Self-compacting concrete (SCC) is an innovative concrete that is able to flow under its own engineers to incorporate many materials into it. A variety of types of concrete exist.7 Self-compacting

North Texas, University of

7

High-volume natural volcanic pozzolan and limestone powder as partial replacements for portland cement in self-compacting and sustainable concrete  

E-Print Network [OSTI]

the resulting self-compacting concrete (SCC). Petrographicity, which satisfy self-compacting concrete criteria withoutcement in self-compacting and sustainable concrete K. Celik

2014-01-01T23:59:59.000Z

8

Variable loading roller  

DOE Patents [OSTI]

An automatic loading roller for transmitting torque in traction drive devices in manipulator arm joints includes a two-part camming device having a first cam portion rotatable in place on a shaft by an input torque and a second cam portion coaxially rotatable and translatable having a rotating drive surface thereon for engaging the driven surface of an output roller with a resultant force proportional to the torque transmitted. Complementary helical grooves in the respective cam portions interconnected through ball bearings interacting with those grooves effect the rotation and translation of the second cam portion in response to rotation of the first. 14 figs.

Williams, D.M.

1988-01-21T23:59:59.000Z

9

Compact passive wireless reinforced concrete corrosion initiation sensor that can be installed in existing steel  

E-Print Network [OSTI]

in existing steel Khalada Perveen, Greg. E. Bridges, Sharmistha Bhadra and Douglas J. Thomson Dept of the transfer of electron charge between the metal and its environment; here between the steel and the concrete. This is a property of the steel/concrete interface and not of the metal itself. Thus, it is impossible to determine

Boyer, Edmond

10

Roller Cam Positioners  

SciTech Connect (OSTI)

Roller Cam Positioners could support the LCLS undulator sections allowing micron sized alignment adjustment of each undulator in 5 degrees of freedom. The supports are kinematic with the number of degrees of freedom matched to the number of constraints. Ton loads are supported on simple ball bearings. Motion is intrinsically bounded. Positioning mechanisms are based on pure rolling motion with sub-micron hysteresis and micron resolution. This note describes a general purpose positioning mechanism suitable for undulator support.

Bowden, Gordon B.

2010-12-07T23:59:59.000Z

11

Energy Efficiency Improvement and Cost Saving Oportunities for the Concrete Industry  

E-Print Network [OSTI]

Applications of Self-Compacting Concrete in Japan, EuropeShutt, C.A. 2002. “Self Compacting Concrete Offers DesignConcrete or Self-Compacting Concrete SCMs Supplementary

Kermeli, Katerina

2013-01-01T23:59:59.000Z

12

E-Print Network 3.0 - aci american concrete Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fellow Tarun R. Naik... are gratefully acknowledged. REFERENCES 1. Okamura, H., Self-Compacting High Performance Concrete, ACI Concrete... : Expanding the Possibility of Concrete...

13

By-Products Utilization  

E-Print Network [OSTI]

-reinforced concrete, self-compacting concrete, ultra-high-strength concrete, conductive concrete, self-curing concrete chemical environments and complex applied loading conditions. The recent development of self-compacting-performance concrete, high-durability concrete (HDC), roller compacted concrete, high-volume fly ash concrete, fiber

Wisconsin-Milwaukee, University of

14

Sensing roller for in-process thickness measurement  

DOE Patents [OSTI]

An apparatus and method are disclosed for processing materials by sensing roller, in which the sensing roller has a plurality of conductive rings (electrodes) separated by rings of dielectric material. Sensing capacitances or impedances between the electrodes provides information on thicknesses of the materials being processed, location of wires therein, and other like characteristics of the materials. 6 figs.

Novak, J.L.

1996-07-16T23:59:59.000Z

15

E-Print Network 3.0 - alkali-activated slag concrete Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

66 By-Products Utilization Summary: Center for By-Products Utilization SELF-COMPACTING CONCRETE (SCC) OR SELF- LEVELING CONCRETE (SLC... - MILWAUKEE 12;2 SELF-COMPACTING...

16

COMPUTATIONAL MODELING OF CONCRETE FLOW: STATE OF THE ART  

E-Print Network [OSTI]

concretes such as Self-Compacting Concrete (SCC) tools for prediction of the form filling of SCC are neededCOMPUTATIONAL MODELING OF CONCRETE FLOW: STATE OF THE ART Nicolas Roussel Laboratoire Central des Lars N. Thrane Concrete Centre, Danish Technological Institute Peter Szabo Department of Chemical

Boyer, Edmond

17

E-Print Network 3.0 - advanced compact accelerator Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Physics 27 By-Products Utilization Summary: Center for By-Products Utilization SELF-COMPACTING CONCRETE (SCC) OR SELF- LEVELING CONCRETE (SLC... - MILWAUKEE 12;2 SELF-COMPACTING...

18

MHK Technologies/Wave Roller | Open Energy Information  

Open Energy Info (EERE)

Roller Roller < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Wave Roller.jpg Technology Profile Primary Organization AW Energy Project(s) where this technology is utilized *MHK Projects/Peniche Portugal *MHK Projects/AW Energy EMEC Technology Resource Click here Wave Technology Type Click here Oscillating Wave Surge Converter Technology Readiness Level Click here TRL 5/6: System Integration and Technology Laboratory Demonstration Technology Description A WaveRoller device is a plate anchored on the sea bottom by its lower part. The back and forth movement of surge moves the plate, and the kinetic energy produced is collected by a piston pump. This energy can be converted to electricity by a closed hydraulic system in combination with a hydraulic motor/generator system. Upgrade to No3 is more powerful hyraulic componets.

19

EVALUATION OF A LOW FRICTION - HIGH EFFICIENCY ROLLER BEARING ENGINE  

SciTech Connect (OSTI)

This Low Friction (High Efficiency Roller Bearing) Engine (LFE) report presents the work done by The Timken Company to conduct a technology demonstration of the benefits of replacing hydrodynamic bearings with roller bearings in the crankshaft and camshaft assemblies of an internal combustion engine for the purpose of collecting data sufficient to prove merit. The engines in the present study have been more extensively converted to roller bearings than any previous studies (40 needle roller bearings per engine) to gain understanding of the full potential of application of bearing technology. The project plan called for comparative testing of a production vehicle which was already respected for having demonstrated low engine friction levels with a rollerized version of that engine. Testing was to include industry standard tests for friction, emissions and fuel efficiency conducted on instrumented dynamometers. Additional tests for fuel efficiency, cold start resistance and other measures of performance were to be made in the actual vehicle. Comparative measurements of noise, vibration and harshness (NVH), were planned, although any work to mitigate the suspected higher NVH level in the rollerized engine was beyond the scope of this project. Timken selected the Toyota Avalon with a 3.5L V-6 engine as the test vehicle. In an attempt to minimize cost and fabrication time, a ‘made-from’ approach was proposed in which as many parts as possible would be used or modified from production parts to create the rollerized engine. Timken commissioned its test partner, FEV Engine Technology, to do a feasibility study in which they confirmed that using such an approach was possible to meet the required dimensional restrictions and tolerances. In designing the roller bearing systems for the crank and cam trains, Timken utilized as many production engine parts as possible. The crankshafts were produced from production line forgings, which use Timken steel, modified with special machining and heat treatment. Timken designed and manufactured all of the roller bearing related components such as the thrust bearing package. The production connecting rods and camshafts could not be used for the roller bearing engine, so new ones were produced according to the team’s designs using Timken steel. The remaining miscellaneous components were designed and procured by FEV. Timken prepared a display version of the crankshaft portion of the production engine without connecting rods which could be driven by a motor through a cogged-belt and electrically actuated clutch arrangement. A modified version was also made in which the engine was outfitted with roller bearings on the main bearing positions. Preliminary tests showed that the rollerized engine was running with 1/3 less friction than the standard display engine. Additional friction testing and noise characterization was cut short because of shipping damage to the rollerized engine display and because of other project priorities. The team did successfully demonstrate the ability to package roller bearings satisfactorily in numerous locations in a typical automotive engine. The scope of this project did not include durability demonstration and that subject would have to be addressed in any follow-on work. In the actual test phase, the rollerized engine did show significantly less friction in motored dynamometer tests compared to its production equivalent. The 5-10% improvement measured in this study was about half that seen in other studies. However, the fired test results did not show a reduction in friction which did not match prior experience or expectations. Subsequent teardown and inspection of the rollerized engine revealed potential sources of excessive friction in the experimental application. These features would be eliminated in a design not based on modification of production parts. The team is confident (based on experience) that friction reduction would be realized with proper modifications.

Kolarik, Robert V. II; Shattuck, Charles W.; Copper, Anthony P.

2009-06-30T23:59:59.000Z

20

Automated roller shades : Daylighting The New York Times Building  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Automated roller shades Automated roller shades Overview The architectural approach The owner's approach Daylighting field study Daylighting control systems Automated roller shades Procurement specifications Shades and Shade Controls Lighting Controls Visualizing daylight Commissioning/ verification Demand response Mainstream solutions Post-occupancy evaluation Publications Sponsors Project team Automated roller shades Automated roller shades manage daylight, solar heat gains, view, glare, privacy, and building appearance through changes in shade height. A roller shade consists of a fabric wrapped around a horizontal tube, which contains a tubular motor. The tubular motor rotates when ac- or dc- power is applied to it causing modulation in shade height. The control system can be designed to optimize numerous variables, the most common being control of direct sun. In this application, the shades were controlled to five preset heights that aligned with the architectural features of the façade - i.e., the vision portion of the window wall - so that direct sun penetrated no more than a specified distance from the window wall. The Times Company also requested that the shades control window glare, yet maximize the opportunity for view and daylight admission. Unnecessary up/down movement of the shade was to be minimized. Fabric choices (openness of the weave, color of the fabric facing toward the interior and exterior) were additional considerations in terms of appearance as well as visual comfort and daylighting benefits.

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

CorrectedProof DETERMINATION OF THE RHEOLOGICAL PARAMETERS OF SELF-COMPACTING  

E-Print Network [OSTI]

CorrectedProof DETERMINATION OF THE RHEOLOGICAL PARAMETERS OF SELF-COMPACTING CONCRETE MATRIX USING version: 7.7.2010 Abstract: The classification of a concrete mixture as self-compacting (SCC) is performed time with viscosity. Key words: self compacting concrete, rheology, slump flow, yield stress

Georgiou, Georgios

22

A thermodynamic approach for compaction of asphaltic composites  

E-Print Network [OSTI]

results. Modeling asphalt concrete compaction, and also the ability to thereby predict response of mixes, is of great importance to the pavement industry. Asphalt concrete exhibits nonlinear response even at small strains and the response of asphalt...

Koneru, Saradhi

2009-05-15T23:59:59.000Z

23

Rolling, Rolling, Rolling: Roller Window Shades | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Rolling, Rolling, Rolling: Roller Window Shades Rolling, Rolling, Rolling: Roller Window Shades Rolling, Rolling, Rolling: Roller Window Shades March 15, 2010 - 11:42am Addthis John Lippert There's a lot of talk these days about installing new energy-efficient windows. Thanks to a Federal tax credit of up to $1,500, window advertisements, both print and radio and TV broadcasting, are aplenty. I don't want to knock energy-efficient windows. There are some great window products available. Some even rival the overall performance of walls, that is, if you account for the heat energy that enters the home via sunshine, depending on the climate and orientation. What I would like to talk about here are window shades. My wife and I bought our house 19 years ago. We are only the 2nd owners. The house has double-pane wooden windows made by a major well-known manufacturer. No

24

Rolling, Rolling, Rolling: Roller Window Shades | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Rolling, Rolling, Rolling: Roller Window Shades Rolling, Rolling, Rolling: Roller Window Shades Rolling, Rolling, Rolling: Roller Window Shades March 15, 2010 - 11:42am Addthis John Lippert There's a lot of talk these days about installing new energy-efficient windows. Thanks to a Federal tax credit of up to $1,500, window advertisements, both print and radio and TV broadcasting, are aplenty. I don't want to knock energy-efficient windows. There are some great window products available. Some even rival the overall performance of walls, that is, if you account for the heat energy that enters the home via sunshine, depending on the climate and orientation. What I would like to talk about here are window shades. My wife and I bought our house 19 years ago. We are only the 2nd owners. The house has double-pane wooden windows made by a major well-known manufacturer. No

25

Compact boson stars in K field theories  

E-Print Network [OSTI]

We study a scalar field theory with a non-standard kinetic term minimally coupled to gravity. We establish the existence of compact boson stars, that is, static solutions with compact support of the full system with self-gravitation taken into account. Concretely, there exist two types of solutions, namely compact balls on the one hand, and compact shells on the other hand. The compact balls have a naked singularity at the center. The inner boundary of the compact shells is singular, as well, but it is, at the same time, a Killing horizon. These singular, compact shells therefore resemble black holes.

C. Adam; N. Grandi; P. Klimas; J. Sanchez-Guillen; A. Wereszczynski

2009-09-16T23:59:59.000Z

26

Compact boson stars in K field theories  

E-Print Network [OSTI]

We study a scalar field theory with a non-standard kinetic term minimally coupled to gravity. We establish the existence of compact boson stars, that is, static solutions with compact support of the full system with self-gravitation taken into account. Concretely, there exist two types of solutions, namely compact balls on the one hand, and compact shells on the other hand. The compact balls have a naked singularity at the center. The inner boundary of the compact shells is singular, as well, but it is, at the same time, a Killing horizon. These singular, compact shells therefore resemble black holes.

Adam, C; Klimas, P; Sánchez-Guillén, J; Wereszczynski, A

2009-01-01T23:59:59.000Z

27

Learning outcomes MSc in Civil Engineering (Concrete Technology) RU-School of Science and Engineering 1  

E-Print Network [OSTI]

including fracture mechanics, high performance concrete including self-compacting concrete and durabilityLearning outcomes MSc in Civil Engineering (Concrete Technology) RU-School of Science and Engineering 1 MSc in Civil Engineering (Cycle 2, level 4) Specialisation: Concrete Technology MSc in Civil

Karlsson, Brynjar

28

E-Print Network 3.0 - axisymmetric concrete structure Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

sites by reducing noise pollution Easily... of in-situ properties of self-compacting concrete mixtures, in ... Source: Wisconsin-Milwaukee, University of - Department of...

29

E-Print Network 3.0 - ash-based geopolymer concrete Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Centre de mathmatiques Collection: Mathematics 11 Mechanical properties of self-compacting concrete reinforced with polypropylene fibres Summary: Mechanical properties of...

30

E-Print Network 3.0 - american concrete institute Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ash", in V. M. Malhotra (Ed.), American Concrete... Center for By-Products Utilization SELF-COMPACTING ... Source: Wisconsin-Milwaukee, University of - Department of Civil...

31

5 - 3D machining system for artistic wooden paint rollers  

Science Journals Connector (OSTI)

Abstract: In this chapter, an intelligent machining system based on an NC machine tool with a rotary unit is introduced to efficiently and easily produce many kinds of artistically designed wooden paint rollers. A post-processor with the fuzzy feed rate generator is also presented to effectively make the machining system run. The post-processor allows the NC machine tool to easily transcribe a relief design from the surface on a flat model to the one on a cylindrical workpiece. The fuzzy feed rate generator generates suitable feed rate values according to the curvature of each relief design. Experimental results show that artistically designed wooden paint rollers can be successfully carved using the proposed machining system.

Fusaomi Nagata; Keigo Watanabe

2013-01-01T23:59:59.000Z

32

MEASUREMENTS OF SHALLOW WATER BREAKING WAVE ROLLERS Merrick C. Haller and Patricio Cataln  

E-Print Network [OSTI]

roller vertical cross-sections and angles of inclination for a pair of laboratory wave conditions. Yet) that the roller area and its angle of inclination on the wave front are important quantities #12;2 governing. (1991), Stive and Wind (1986), Dally and Brown (1995), and Lippmann et al. (1996); excepting Dally

Haller, Merrick

33

TEST ON PRESTRESSED CONCRETE BEAM WITH AFRP SPIRAL CONFINEMENT AND EXTERNAL ARAMID TENDONS  

E-Print Network [OSTI]

D at the University of Cambridge and is currently researching the properties of self-compacting concretesTEST ON PRESTRESSED CONCRETE BEAM WITH AFRP SPIRAL CONFINEMENT AND EXTERNAL ARAMID TENDONS C. J concrete beam. Aramid Fibre Reinforced Polymers (AFRP) are used to make compression confinement in the form

Burgoyne, Chris

34

Irregular tooth spacing reduces roller cone bit tracking problems  

SciTech Connect (OSTI)

On tungsten carbide insert bits, irregularly spaced teeth can help stop tracking problems, leading to increased penetration rates and longer bit runs. Tracking, which occurs when teeth fall into the craters formed during previous bit rotations, severely affects the performance of roller cone rock bits. The tracking tendencies of tungsten carbide insert (TCI) bits are generally considered once the bit is built and tested, rather than during the design process. Once tracking is initiated, crater depth quickly reaches the full projection of the teeth, bringing the cone steel in contact with the rock. This tracking increases the contact area while reducing contact stresses beneath the inserts. Tracking increases the likelihood that neighboring rows of cutters will line up on the hole bottom, forcing the bit to rotate about a point other than its geometric center. This phenomenon is termed off-center rotation or forward whirl. Off-center rotation produces rings of uncut bottom and a further reduction in contact stresses. This article covers laboratory and field data used in the development and validation of a proprietary algorithm that determines the optimal tooth spacing to eliminate tracking. This study confirms that an algorithm can be applied effectively in the roller cone bit design process to improve coverage of the rock surface during drilling. In addition, these laboratory tests improve the understanding of a single gear-like wheel, a key to understanding total bit behavior.

Kenner, J.V. [Hughes Christensen Co., Houston, TX (United States); Boylan, T.P. [Transatlantic Technical Services, Houston, TX (United States)

1996-05-13T23:59:59.000Z

35

Irregular tooth spacing reduces tracking of roller cone bits  

SciTech Connect (OSTI)

Tracking, which occurs when teeth fall in to the craters formed during previous bit rotations, severely impacts the performance of roller cone rock bits. The tracking tendencies of tungsten carbide insert (TCI) bits are generally considered once the bit is built and tested, rather than during the design process. Once tracking is initiated, crater depth quickly reaches the full projection of the teeth, bringing the cone steel in contact with the rock. This increases the contact area while reducing contact stresses beneath the inserts. Tracking increases the likelihood that neighboring rows of cutters will line up on the hole bottom forcing the bit to rotate about a point other than its geometric center--a phenomenon referred to as off-center rotation or forward whirl. Off-center rotation produces rings of uncut bottom and a further reduction in contact stresses. This paper discusses laboratory and field data used in the development and validation of a proprietary algorithm that determines the optimal tooth spacing to eliminate tracking. This study confirms that an algorithm can be applied effectively in the roller cone bit design process to improve coverage of the rock surface during drilling. In addition, these laboratory tests improve the understanding of a single gear-like wheel, a prerequisite to understanding total bit behavior.

Kenner, J.V. [Hughes Christensen Co., Houston, TX (United States); Boylan, T.P. [Transatlantic Technical Services, Houston, TX (United States)

1996-09-01T23:59:59.000Z

36

Fault diagnosis of roller bearing using fuzzy classifier and histogram features with focus on automatic rule learning  

Science Journals Connector (OSTI)

Roller bearing is one of the most widely used elements in rotary machines. Condition monitoring of such elements is conceived as pattern recognition problem. Pattern recognition has three main phases: feature extraction, feature selection and feature ... Keywords: Decision tree, Feature selection, Fuzzy, Histogram features, Roller bearing, Rule learning

V. Sugumaran; K. I. Ramachandran

2011-05-01T23:59:59.000Z

37

Journal of Fluids and Structures 20 (2005) 129140 Blood flow and damage by the roller pumps during  

E-Print Network [OSTI]

Journal of Fluids and Structures 20 (2005) 129­140 Blood flow and damage by the roller pumps during created in a centrifugal pump used for a cardiopulmonary bypass, little is known about the blood flow and consequent damage in a roller pump. A time- dependent moving boundary problem is solved in this paper

Luo, Xiaoyu

38

Compact tori  

Science Journals Connector (OSTI)

The design of conventional toroidal fusion reactors is constrained by the need to link the plasma torus (and its surrounding blanket) with a set of toroidal-field-generating coils. Compact-torus research is aimed at the objective of creating stable toroidal plasma entities in the absence of an external toroidal field, so that the conventional constraint on reactor design can be removed. Two basic types of grossly stable compact tori have been demonstrated experimentally and theoretically: (1) A low-aspect-ratio toroid of oblate spheroidal outer contour, with finite internal toroidal field (commonly called “spheromak”) can be formed by a “magnetized” coaxial plasma gun, or by a reverse-poloidal-field pinch, or by the transformer action of a “magnetic flux core.” (2) A plasma toroid with a prolate (racetrack-shaped) confining poloidal field and strictly null toroidal field can be formed by dynamic reverse-poloidal-field pinch techniques.

H.P. Furth

1983-01-01T23:59:59.000Z

39

By-Products Utilization  

E-Print Network [OSTI]

ash. Paving applications, such as Roller Compacted Concrete for industrial plants, parking lots be used in Self-Consolidating Concrete applications. This type of concrete requires additional fines that concrete Bricks, Blocks, and Paving Stones can also be made with the Corn Products' coal ash. Additionally

Wisconsin-Milwaukee, University of

40

Nanoimprint lithography with a soft roller and focused UV light for flexible substrates  

Science Journals Connector (OSTI)

This paper presents a nanoimprint lithography system for flexible substrates. With this system, a flexible substrate is pressed on a stamp with a low pressing load, a narrow contact area, and a focused ultraviolet (UV) light. The system efficiently transfers ... Keywords: Flexible substrate, Nanoimprint lithography, Roller, Ultraviolet light

Hyungjun Lim; Geehong Kim; Kee-Bong Choi; Mira Jeong; Jihyeong Ryu; Jaejong Lee

2012-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Custom 3D-Printed Rollers for Frieze Pattern Cookies Robert Hanson  

E-Print Network [OSTI]

Custom 3D-Printed Rollers for Frieze Pattern Cookies Robert Hanson Towson University, Emeritus a method for converting images of repeating patterns, e.g., Roman friezes or Escher tessellations, into 3D-printed the world of mathematics and the art of cooking. Fractal cookies based on stretching and folding [1] and 3D-printed

42

ParadigmParadigm Concrete RecyclingConcrete Recycling  

E-Print Network [OSTI]

ParadigmParadigm Concrete RecyclingConcrete Recycling #12;Recycled ConcreteRecycled Concrete ·· Whatever steel goes into PCC must comeWhatever steel goes into PCC must come out for recycleout for recycle ·· Aggregates have a big impact on the costAggregates have a big impact on the cost of recyclingof recycling

43

375revision:1996-03-17modified:1996-03-17 Some Compact Logics -Results in ZFC  

E-Print Network [OSTI]

isomomorphisms between substructures). Generally compactness fails badly [16], but if we restrict our- self to certain concrete classes then we may be able to retain compactness. In this paper we will show that if we375revision:1996-03-17modified:1996-03-17 Some Compact Logics - Results in ZFC Alan H. Mekler

Shelah, Saharon

44

Lightweight polymer concrete composites  

SciTech Connect (OSTI)

Lightweight polymer concrete composites have been developed with excellent insulating properties. The composites consist of lightweight aggregates such as expanded perlites, multicellular glass nodules, or hollow alumina silicate microspheres bound together with unsaturated polyester or epoxy resins. These composites, known as Insulating Polymer Concrete (IPC), have thermal conductivites from 0.09 to 0.19 Btu/h-ft-/sup 0/F. Compressive strengths, dependent upon the aggregates used, range from 1000 to 6000 psi. These materials can be precast or cast-in-place on concrete substrates. Recently, it has been demonstrated that these materials can also be sprayed onto concrete and other substrates. An overlay application of IPC is currently under way as dike insulation at an LNG storage tank facility. The composites have numerous potentials in the construction industry such as insulating building blocks or prefabricated insulating wall panels.

Fontana, J.J.; Steinberg, M.; Reams, W.

1985-08-01T23:59:59.000Z

45

Pecos River Compact (Texas)  

Broader source: Energy.gov [DOE]

This legislation authorizes the state's entrance into the Pecos River Compact, a joint agreement between the states of New Mexico and Texas. The compact is administered by the Pecos River Compact...

46

Investigation for determining the curing characteristics of lightweight aggregate concrete  

E-Print Network [OSTI]

reached in froa 65 to 70 days for clay and shale con- ctetece The possibility of the entrapped or absorbed water in the aggregate acting as a self curing agent for lightweight aggregate concrete and the supporting statcscents concerning the slower than... standard 5/8 inch roue@, bullet~ tamping rod, while the beams wars compacted by being roddsd 55 times on each of two equal S inch layers with the standard tamping rod, The concrete an both sides and at the ends of the bxsm mold was spaded with a travel...

Carlton, Thomas Arlis

1955-01-01T23:59:59.000Z

47

128 CEREAL CHEMISTRY Effects of Alkali Debranning, Roller Mill Cracking and Gap Setting, and Alkali  

E-Print Network [OSTI]

was obtained when steeping corn in 0.5% NaOH for 1 hr at 45�C. Alkali corn wet-milling has been studied Steeping Conditions on Milling Yields from a Dent Corn Hybrid P. Yang,1 L. Du,1,2 D. L. Wang,1 B. H. Li,1 K was significantly affected by all three main unit oper- ations in alkali wet-milling (debranning, roller milling

48

MIXING RANK-ONE ACTIONS OF LOCALLY COMPACT ABELIAN GROUPS  

E-Print Network [OSTI]

MIXING RANK-ONE ACTIONS OF LOCALLY COMPACT ABELIAN GROUPS Alexandre I. Danilenko and Cesar E. Silva that such transformations are mixing of all orders [Ka], [Ry1] and have minimal self-joinings of all orders [Ki], [Ry1 this progress, not so many concrete examples of rank-one mixing ac- tions are known. Most of them were obtained

Silva, Cesar E.

49

Introduction to Compact Riemann Surfaces Alexander I. Bobenko  

E-Print Network [OSTI]

1 Introduction to Compact Riemann Surfaces Alexander I. Bobenko Institut f¨ur Mathematik more self contained. In particular we will deal with classical descriptions of Riemann surfaces, and uniformization techniques. Motivated by the concrete point of view on Riemann surfaces of this book we choose

Bobenko, Alexander I.

50

Sustainability of Concrete forSustainability of Concrete for Infrastructure  

E-Print Network [OSTI]

Sustainability of Concrete forSustainability of Concrete for Infrastructure Dr. Jason H. Ideker University #12;Overview · Background and research at OSU · Sustainability and the link to durability · What limits sustainability in concrete materials? ­ Degradation: Alkali-silica reaction ­ Environmental

Bertini, Robert L.

51

By-Products Utilization  

E-Print Network [OSTI]

of consistency and fluidity, self-leveling and self-compacting, contain very little portland cement, and large applications, such as Roller Compacted Concrete for industrial plants, materials handling yards, parking lots quantities of ash and water. It is believed that concrete Bricks, Blocks, and Paving Stones can also be made

Wisconsin-Milwaukee, University of

52

The use of the maturity concept in evaluating development of concrete pullout strength  

E-Print Network [OSTI]

, the resulting strength cannot be related directly to the strength obtained by the same concrete mix cast into a structure because of differences which exist (13, 30) in: (a) environmental exposure; (b) methods of placing; and (c) degree of compaction. 2... bearing ring which is in direct contact with the concrete surface. The dimension for the inside diameter of the bearing ring is dependent upon the other critical dimensions chosen, and is it. self a critical dimensiot. . The proper combination...

Dilly, Ronald Lee

1981-01-01T23:59:59.000Z

53

Electroosmotic decontamination of concrete  

SciTech Connect (OSTI)

A method is described for the electroosmotic decontamination of concrete surfaces, in which an electrical field is used to induce migration of ionic contaminants from porous concrete into an electrolyte solution that may be disposed of as a low-level liquid radioactive waste (LLRW); alternately, the contaminants from the solution can be sorbed onto anion exchange media in order to prevent contaminant buildup in the solution and to minimize the amount of LLRW generated. We have confirmed the removal of uranium (and infer the removal of {sup 99}Tc) from previously contaminated concrete surfaces. In a typical experimental configuration, a stainless steel mesh is placed in an electrolyte solution contained within a diked cell to serve as the negative electrode (cathode) and contaminant collection medium, respectively, and an existing metal penetration (e.g., piping, conduit, or rebar reinforcement within the concrete surface) serves as the positive electrode (anode) to complete the cell. Typically we have achieved 70 to >90% reductions in surface activity by applying <400 V and <1 A for 1--3 h (energy consumption of 0.4--12 kWh/ft{sup 2}).

Bostick, W.D.; Bush, S.A.; Marsh, G.C.; Henson, H.M. [Oak Ridge K-25 Site, TN (United States); Box, W.D.; Morgan, I.L. [Oak Ridge National Lab., TN (United States)

1993-03-01T23:59:59.000Z

54

Red River Compact (Texas)  

Broader source: Energy.gov [DOE]

The Red River Compact Commission administers the Red River Compact to ensure that Texas receives its equitable share of quality water from the Red River and its tributaries as apportioned by the...

55

Concrete containment aging study  

SciTech Connect (OSTI)

In 1989, IAEA initiated a pilot study on the management of aging of nuclear power plant components. The Phase I and II studies of concrete containment are discussed. With the data base, plant owners will be able to review and enhance their existing programs. IAEA will analyze data provided by participating plants and the report is scheduled to be released by late 1994 (final report release mid-1995).

Pachner, J. [International Atomic Energy Agency, Vienna (Austria); Tai, T.M. [Bechtel National, Inc., Oak Ridge, TN (United States); Naus, D. [Oak Ridge National Lab., TN (United States)

1994-04-01T23:59:59.000Z

56

An investigation of roller burnishing process on tool steel material using CNC lathe  

Science Journals Connector (OSTI)

This paper investigates the surface characteristics of tool steel material in the roller burnishing on CNC lathe. Burnishing is a cold working, surface finishing process in which plastic deformation of surface irregularities takes place by exerting pressure through a hard roller on a surface to generate uniform and work hardened surface. The tool and work piece materials are tungsten carbide (69 HRC) and HCHCr tool steel (35 HRC). The input parameters are burnishing force, speed, feed and the number of passes. The output parameters are surface roughness and surface hardness. The surface roughness has reduced by 127.7% and hardness has improved by 55.5%. The minimum surface roughness obtained in the operating condition of burnishing force of 900 N, feed of 0.1 mm/rev, speed of 600 rpm and fourth number of pass and the value is 0.153 ?m. The empirical model is developed for the surface characteristics and validated using Pearson product moment correlation coefficient.

M.R. Stalin John; B.K. Vinayagam

2011-01-01T23:59:59.000Z

57

Corrosion resistant concrete using corrosion resistant steel.  

E-Print Network [OSTI]

??Corrosion of reinforced concrete is a major concern in the United States infrastructure. It is possible to create corrosion resistant concrete structures throughcareful evaluation of… (more)

Beh, David

2013-01-01T23:59:59.000Z

58

DATABASE FOR PREMATURE CONCRETE DETERIORATION  

E-Print Network [OSTI]

-4085: Preventing Alkali-Silica Reaction and Delayed Ettringite Formation in New Concrete AUGUST 2004 Performing-Silica Reaction and Delayed Ettringite Formation in New Concrete DDaattaabbaassee ffoorr PPrreemmaattuurree on research performed under TxDOT Project 0-4085, "Preventing Alkali-Silica Reaction and Delayed Ettringite

Texas at Austin, University of

59

Edge coating apparatus with movable roller applicator for solar cell substrates  

DOE Patents [OSTI]

A non-contact edge coating apparatus includes an applicator for applying a coating material on an edge of a solar cell substrate and a control system configured to drive the applicator. The control system may drive the applicator along an axis to maintain a distance with an edge of the substrate as the substrate is rotated to have the edge coated with a coating material. The applicator may include a recessed portion into which the edge of the substrate is received for edge coating. For example, the applicator may be a roller with a groove. Coating material may be introduced into the groove for application onto the edge of the substrate. A variety of coating materials may be employed with the apparatus including hot melt ink and UV curable plating resist.

Pavani, Luca; Abas, Emmanuel

2012-12-04T23:59:59.000Z

60

Sihang Wei, Daniel Kuchma Gauging of Concrete Crossties to Investigate  

E-Print Network [OSTI]

of Concrete Crossties to Investigate Load Path in Laboratory and Field Testing Mechanistic Design Framework: Concrete Material Properties Concrete core testing Newmark, UIUC Crosstie center positive bending test Testing Background: Concrete Crosstie Design Cracking Moment Concrete compressive strength From crosstie

Barkan, Christopher P.L.

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

ASSESSMENT OF RELEASE RATES FOR RADIONUCLIDES IN ACTIVATED CONCRETE.  

SciTech Connect (OSTI)

The Maine Yankee (MY) nuclear power plant is undergoing the process of decontamination and decommissioning (D&D). Part of the process requires analyses that demonstrate that any radioactivity that remains after D&D will not cause exposure to radioactive contaminants to exceed acceptable limits. This requires knowledge of the distribution of radionuclides in the remaining material and their potential release mechanisms from the material to the contacting groundwater. In this study the concern involves radionuclide contamination in activated concrete in the ICI Sump below the containment building. Figures 1-3 are schematic representations of the ICI Sump. Figure 2 and 3 contain the relevant dimensions needed for the analysis. The key features of Figures 2 and 3 are the 3/8-inch carbon steel liner that isolates the activated concrete from the pit and the concrete wall, which is between 7 feet and 7 feet 2 inches thick. During operations, a small neutron flux from the reactor activated the carbon steel liner and the concrete outside the liner. Current MY plans call for filling the ICI sump with compacted sand.

SULLIVAN,T.M.

2003-08-23T23:59:59.000Z

62

Symmetry, Compact Closure and Dagger Compactness for Categories of Convex Operational Models  

E-Print Network [OSTI]

In the categorical approach to the foundations of quantum theory, one begins with a symmetric monoidal category, the objects of which represent physical systems, and the morphisms of which represent physical processes. Usually, this category is taken to be at least compact closed, and more often, dagger compact, enforcing a certain self-duality, whereby preparation processes (roughly, states) are inter-convertible with processes of registration (roughly, measurement outcomes). This is in contrast to the more concrete "operational" approach, in which the states and measurement outcomes associated with a physical system are represented in terms of what we here call a "convex operational model": a certain dual pair of ordered linear spaces -- generally, {\\em not} isomorphic to one another. On the other hand, state spaces for which there is such an isomorphism, which we term {\\em weakly self-dual}, play an important role in reconstructions of various quantum-information theoretic protocols, including teleportatio...

Barnum, Howard; Wilce, Alexander

2010-01-01T23:59:59.000Z

63

Stabilization of compactible waste  

SciTech Connect (OSTI)

This report summarizes the results of series of experiments performed to determine the feasibility of stabilizing compacted or compactible waste with polymers. The need for this work arose from problems encountered at disposal sites attributed to the instability of this waste in disposal. These studies are part of an experimental program conducted at Brookhaven National Laboratory (BNL) investigating methods for the improved solidification/stabilization of DOE low-level wastes. The approach taken in this study was to perform a series of survey type experiments using various polymerization systems to find the most economical and practical method for further in-depth studies. Compactible dry bulk waste was stabilized with two different monomer systems: styrene-trimethylolpropane trimethacrylate (TMPTMA) and polyester-styrene, in laboratory-scale experiments. Stabilization was accomplished by wetting or soaking compactible waste (before or after compaction) with monomers, which were subsequently polymerized. Three stabilization methods are described. One involves the in-situ treatment of compacted waste with monomers in which a vacuum technique is used to introduce the binder into the waste. The second method involves the alternate placement and compaction of waste and binder into a disposal container. In the third method, the waste is treated before compaction by wetting the waste with the binder using a spraying technique. A series of samples stabilized at various binder-to-waste ratios were evaluated through water immersion and compression testing. Full-scale studies were conducted by stabilizing two 55-gallon drums of real compacted waste. The results of this preliminary study indicate that the integrity of compacted waste forms can be readily improved to ensure their long-term durability in disposal environments. 9 refs., 10 figs., 2 tabs.

Franz, E.M.; Heiser, J.H. III; Colombo, P.

1990-09-01T23:59:59.000Z

64

Testing of concrete by laser ablation  

DOE Patents [OSTI]

A method is disclosed for testing concrete in a structure in situ, by: directing a succession of pulses of laser radiation at a point on the structure so that each pulse effects removal of a quantity of concrete and transfers energy to the concrete; detecting a characteristic of energy which has been transferred to the concrete; determining, separately from the detecting step, the total quantity of concrete removed by the succession of pulses; and calculating a property of the concrete on the basis of the detected energy characteristic and the determined total quantity of concrete removed. 1 fig.

Flesher, D.J.; Becker, D.L.; Beem, W.L.; Berry, T.C.; Cannon, N.S.

1997-01-07T23:59:59.000Z

65

Testing of concrete by laser ablation  

DOE Patents [OSTI]

A method of testing concrete in a structure in situ, by: directing a succession of pulses of laser radiation at a point on the structure so that each pulse effects removal of a quantity of concrete and transfers energy to the concrete; detecting a characteristic of energy which has been transferred to the concrete; determining, separately from the detecting step, the total quantity of concrete removed by the succession of pulses; and calculating a property of the concrete on the basis of the detected energy characteristic and the determined total quantity of concrete removed.

Flesher, Dann J. (Benton City, WA); Becker, David L. (Kennewick, WA); Beem, William L. (Kennewick, WA); Berry, Tommy C. (Kennewick, WA); Cannon, N. Scott (Kennewick, WA)

1997-01-01T23:59:59.000Z

66

Microstructural investigations on aerated concrete  

SciTech Connect (OSTI)

Aerated concrete is characterized by the presence of large voids deliberately included in its matrix to reduce the density. This study reports the investigations conducted on the structure of cement-based autoclaved aerated concrete (AAC) and non-AAC with sand or fly ash as the filler. The reasons for changes in compressive strength and drying shrinkage are explained with reference to the changes in the microstructure. Compositional analysis was carried out using XRD. It was observed that fly ash responds poorly to autoclaving. The process of pore refinement in fly ash mixes is discussed with reference to the formation of Hadley grains as well as fly ash hydration. The paste-void interface in aerated concrete investigated in relation to the paste-aggregate interface in normal concrete revealed the existence of an interfacial transition zone.

Narayanan, N.; Ramamurthy, K.

2000-03-01T23:59:59.000Z

67

CONCRETE PAVING & TEXTURING FOR SUSTAINABILITY  

E-Print Network [OSTI]

CONCRETE PAVING & TEXTURING FOR SUSTAINABILITY Bernard Igbafen Izevbekhai, Research Operations 2012 #12;OUTLINE #12;SUSTAINABILITY · Meeting the needs of the present generation without compromising Brundtland Commission in 1987: · Successful application of the principles of sustainable development lies

Minnesota, University of

68

Electrically conductive polymer concrete coatings  

DOE Patents [OSTI]

A sprayable electrically conductive polymer concrete coating for vertical and overhead applications is described. The coating is permeable yet has low electrical resistivity (<10 ohm-cm), good bond strength to concrete substrates, and good weatherability. A preferred formulation contains about 60 wt% calcined coke breeze, 40 wt% vinyl ester resin with 3.5 wt% modified bentonite clay. Such formulations apply evenly and provide enough rigidity for vertical or overhead structures so there is no drip or sag. 4 tabs.

Fontana, J.J.; Elling, D.; Reams, W.

1988-05-26T23:59:59.000Z

69

Electrically conductive polymer concrete coatings  

DOE Patents [OSTI]

A sprayable electrically conductive polymer concrete coating for vertical d overhead applications is described. The coating is permeable yet has low electrical resistivity (<10 ohm-cm), good bond strength to concrete substrates, and good weatherability. A preferred formulation contains about 60 wt % calcined coke breeze, 40 wt % vinyl ester with 3.5 wt % modified bentonite clay. Such formulations apply evenly and provide enough rigidity for vertical or overhead structures so there is no drip or sag.

Fontana, Jack J. (Shirley, NY); Elling, David (Centereach, NY); Reams, Walter (Shirley, NY)

1990-01-01T23:59:59.000Z

70

Symmetry, Compact Closure and Dagger Compactness for Categories of Convex Operational Models  

E-Print Network [OSTI]

In the categorical approach to the foundations of quantum theory, one begins with a symmetric monoidal category, the objects of which represent physical systems, and the morphisms of which represent physical processes. Usually, this category is taken to be at least compact closed, and more often, dagger compact, enforcing a certain self-duality, whereby preparation processes (roughly, states) are inter-convertible with processes of registration (roughly, measurement outcomes). This is in contrast to the more concrete "operational" approach, in which the states and measurement outcomes associated with a physical system are represented in terms of what we here call a "convex operational model": a certain dual pair of ordered linear spaces -- generally, {\\em not} isomorphic to one another. On the other hand, state spaces for which there is such an isomorphism, which we term {\\em weakly self-dual}, play an important role in reconstructions of various quantum-information theoretic protocols, including teleportation and ensemble steering. In this paper, we characterize compact closure of symmetric monoidal categories of convex operational models in two ways: as a statement about the existence of teleportation protocols, and as the principle that every process allowed by that theory can be realized as an instance of a remote evaluation protocol --- hence, as a form of classical probabilistic conditioning. In a large class of cases, which includes both the classical and quantum cases, the relevant compact closed categories are degenerate, in the weak sense that every object is its own dual. We characterize the dagger-compactness of such a category (with respect to the natural adjoint) in terms of the existence, for each system, of a {\\em symmetric} bipartite state, the associated conditioning map of which is an isomorphism.

Howard Barnum; Ross Duncan; Alexander Wilce

2010-04-16T23:59:59.000Z

71

Impact compression properties of concrete  

SciTech Connect (OSTI)

Controlled impact experiments have been performed on concrete to determine dynamic material properties. The properties assessed include the high-strain-rate yield strength (Hugoniot elastic limit), and details of the inelastic dynamic stress versus strain response of the concrete. The latter features entail the initial void-collapse modulus, the high-stress limiting void-collapse strain, and the stress amplitude dependence of the deformational wave which loads the concrete from the elastic limit to the maximum dynamics stress state. Dynamic stress-versus-strain data are reported over the stress range of the data, from the Hugoniot elastic limit to in excess of 2 GPa. 6 figs, 4 refs, 4 tabs.

Grady, D.E.

1993-02-01T23:59:59.000Z

72

Impact compression properties of concrete  

SciTech Connect (OSTI)

Controlled impact experiments have been performed on concrete to determine dynamic material properties. The properties assessed include the high-strain-rate yield strength (Hugoniot elastic limit), and details of the inelastic dynamic stress versus strain response of the concrete. The latter features entail the initial void-collapse modulus, the high-stress limiting void-collapse strain, and the stress amplitude dependence of the deformational wave which loads the concrete from the elastic limit to the maximum dynamics stress state. Dynamic stress-versus-strain data are reported over the stress range of the data, from the Hugoniot elastic limit to in excess of 2 GPa. 6 figs, 4 refs, 4 tabs.

Grady, D.E.

1993-01-01T23:59:59.000Z

73

Nuclear Facility Construction - Structural Concrete, May 29,...  

Broader source: Energy.gov (indexed) [DOE]

Nuclear Facility Construction - Structural Concrete, May 29, 2009 (HSS CRAD 64-15, Rev. 0) Nuclear Facility Construction - Structural Concrete, May 29, 2009 (HSS CRAD 64-15, Rev....

74

Gina Ahlstrom Concrete Pavement Engineer  

E-Print Network [OSTI]

" "Diagnosis Prognosis and Mitigation of Alkali-Silica Reaction (ASR) in Transportation Structures" #12;FHWA;Performance Approach ASTM C 1293 Concrete PrismTest Testing the ability of SCM's or chemical admixtures, such as lithium, to control ASR. Guidelines provided for testing lithium nitrate. Criteria for expansion is 0

75

Nanogranular origin of concrete creep  

Science Journals Connector (OSTI)

...with water, sand, and aggregates...situ creep behavior of calcium–silicate–hydrates (C–S...complex creep behavior of concrete...and binding phase of hardened Portland...silicate–hydrate (C–S...with water, sand, and...situ creep behavior of calcium-silicate-hydrates (C-S-H...

Matthieu Vandamme; Franz-Josef Ulm

2009-01-01T23:59:59.000Z

76

Compact character controllers  

Science Journals Connector (OSTI)

We present methods for creating compact and efficient data-driven character controllers. Our first method identifies the essential motion data examples tailored for a given task. It enables complex yet efficient high-dimensional controllers, as well ... Keywords: data driven animation, human animation, optimal control

Yongjoon Lee; Seong Jae Lee; Zoran Popovi?

2009-12-01T23:59:59.000Z

77

Industrial Optimization Compact Course  

E-Print Network [OSTI]

Industrial Optimization Compact Course and Challenge Workshop Optimization plays a crucial role of the processes are typically nonlinear and dyna- mic. Thus, complex dynamic optimization or optimal control in industrial optimization. February 17­20, 2014 ·9.00­17.00 IWR ·Im Neuenheimer Feld 368 ·69120 Heidelberg www

Kirches, Christian

78

Microwave concrete decontamination - Phase II results  

SciTech Connect (OSTI)

This report documents the results of the second phase of a four-phase development program to develop a system to decontaminate concrete using microwave energy. In the first phase of the program the feasibility of using microwaves to remove concrete surfaces was demonstrated. In the first phase experiments, concrete slabs were placed on a translator and moved beneath a stationery microwave system. The second phase demonstrated the ability to mobilize the technology to remove the surfaces from concrete floors. Phases III and IV will further develop the technology to be remotely operated and capable of removing concrete from floors as well as from vertical surfaces.

White, T.L.; Foster, D. Jr.

1994-06-01T23:59:59.000Z

79

High flux compact neutron generators  

E-Print Network [OSTI]

High Flux Compact Neutron Generators ‡ J. Reijonen §,1 , T-Compact high flux neutron generators are developed at thevoltage feed through of the generator is shown in Fig. 4.

Reijonen, J.; Lou, T.-P.; Tolmachoff, B.; Leung, K.-N.; Verbeke, J.; Vujic, J.

2001-01-01T23:59:59.000Z

80

Blast simulator wall tests : experimental methods and mitigation strategies for reinforced concrete and concrete Masonry  

E-Print Network [OSTI]

in reinforced concrete section d cfb Distance to bottom CFRPof bolt A c Area of concrete A cfb Cross-sectional area offunction for BG programmers F cfb Stress in bottom CFRP F

Oesterle, Michael G.

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Phase 2 microwave concrete decontamination results  

SciTech Connect (OSTI)

The authors report on the results of the second phase of a four-phase program at Oak Ridge National Laboratory to develop a system to decontaminate concrete using microwave energy. The microwave energy is directed at the concrete surface through the use of an optimized wave guide antenna, or applicator, and this energy rapidly heats the free water present in the interstitial spaces of the concrete matrix. The resulting steam pressure causes the surface to burst in much the same way popcorn pops in a home microwave oven. Each steam explosion removes several square centimeters of concrete surface that are collected by a highly integrated wave guide and vacuum system. The authors call this process the microwave concrete decontamination, or MCD, process. In the first phase of the program the principle of microwaves concrete removal concrete surfaces was demonstrated. In these experiments, concrete slabs were placed on a translator and moved beneath a stationary microwave system. The second phase demonstrated the ability to mobilize the technology to remove the surfaces from concrete floors. Area and volume concrete removal rates of 10.4 cm{sup 2}/s and 4.9 cm{sup 3}/S, respectively, at 18 GHz were demonstrated. These rates are more than double those obtained in Phase 1 of the program. Deeper contamination can be removed by using a longer residence time under the applicator to create multiple explosions in the same area or by taking multiple passes over previously removed areas. Both techniques have been successfully demonstrated. Small test sections of painted and oil-soaked concrete have also been removed in a single pass. Concrete with embedded metal anchors on the surface has also been removed, although with some increased variability of removal depth. Microwave leakage should not pose any operational hazard to personnel, since the observed leakage was much less than the regulatory standard.

White, T.L.; Foster, D. Jr.; Wilson, C.T.; Schaich, C.R.

1995-04-01T23:59:59.000Z

82

Performance of Concrete Bridge Deck Surface Treatments.  

E-Print Network [OSTI]

??The purpose of this research was to identify the types of surface treatments available for use on concrete bridge decks and to determine which materials… (more)

Nelsen, Tyler S.

2005-01-01T23:59:59.000Z

83

Investigation of brucite-fiber-reinforced concrete  

Science Journals Connector (OSTI)

Laboratory experiments were made on the brucite-fiber-reinforced concrete composites. Effects of brucite fiber grades and the dosage on flexural strength, compressive strength, impact strength, sulfate corrosion resistance and the slump, cohesiveness, as well as the water retentiveness were also investigated. Different water reducers were tested. The particle-size characteristics of brucite fibers, the densities of the concrete, and the viscosities of the fiber/water-reducer suspensions were also measured. Results show that proper addition of brucite fibers in concrete can improve the mechanical properties, especially the flexural strength. In the test, the optimum quantity was about 0.5 wt.% of concrete. With the dosage increase of brucite fibers in concrete, the fluidity and the density of the concrete decrease. The performance of the concrete strengths is the collective interactions of the fiber reinforcement and the density reduction. The aspect ratio and the surface area of brucite fibers are the important affecting factors to the workability and the mechanical properties of the fiber concrete. Larger aspect ratios and smaller surface areas benefit the reinforcement. Water reducers with lower fiber suspension viscosities are favorable in improving the workability and strengths of the brucite fiber concrete.

Liu Kaiping; Cheng Hewei; Zhou Jing'en

2004-01-01T23:59:59.000Z

84

GRANCRETE FOR FLEXURAL STRENGTHENING OF CONCRETE STRUCTURES  

E-Print Network [OSTI]

the concrete to the fibers (ACI 440.2R-08). Research conducted at Lulea University of Technology in Sweden has

85

Pentek concrete scabbling system: Baseline report; Summary  

SciTech Connect (OSTI)

The Pentek concrete scabbling system consists of the MOOSE{reg_sign} scabbler, the SQUIRREL{reg_sign}-I and SQUIRREL{reg_sign}-III scabblers, and VAC-PAC. The scabblers are designed to scarify concrete floors and slabs using cross section, tungsten carbide tipped bits. The bits are designed to remove concrete in 3/8 inch increments. The bits are either 9-tooth or demolition type. The scabblers are used with a vacuum system designed to collect and filter the concrete dust and contamination that is removed from the surface. The safety and health evaluation during the human factors assessment focused on two main areas: noise and dust.

NONE

1997-07-31T23:59:59.000Z

86

Compact LINAC for deuterons  

SciTech Connect (OSTI)

We are developing a compact deuteron-beam accelerator up to the deuteron energy of a few MeV based on room-temperature inter-digital H-mode (IH) accelerating structures with the transverse beam focusing using permanent-magnet quadrupoles (PMQ). Combining electromagnetic 3-D modeling with beam dynamics simulations and thermal-stress analysis, we show that IHPMQ structures provide very efficient and practical accelerators for light-ion beams of considerable currents at the beam velocities around a few percent of the speed of light. IH-structures with PMQ focusing following a short RFQ can also be beneficial in the front end of ion linacs.

Kurennoy, S S [Los Alamos National Laboratory; O' Hara, J F [Los Alamos National Laboratory; Rybarcyk, L J [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

87

Microstructure and Wear Properties of Laser Coating Reinforced by Ti(CxN1-x on Adamite Roller  

Science Journals Connector (OSTI)

Fe-based layer with Ti(CINI-x) particulates on Adamite roller surface was obtained by a 5 kW traverse-flowing CO2 laser cladding technology. The microstructures of the layer were detected by optical microscopy (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM), and electron probe microscopy analysis (EMPA). The tests of wear resistance was carried out on the test machine. It was seen that a good metallurgical bonding between the coating and the substrate was achieved. The microstructure contains bulky dendritic crystal and small size Ti(CINI-x) grains that are uniformly distributed in the solid solution matrix. The wear tests showed that the laser coating provided an excellent wear resistance property at room temperature.

Yong-tian QI; Zeng-da ZOU

2009-01-01T23:59:59.000Z

88

The life cycle assessment of concrete manufacturing in Kuwait  

E-Print Network [OSTI]

Concrete is the second most widely used material in the world after water. Annually 9,120 million tons of concrete are produced, which is an equivalent of 1.3 tons of concrete per individual. As the world's primary ...

El Mostafa, Mayce (Mayce A.)

2013-01-01T23:59:59.000Z

89

Susquehanna River Basin Compact (Maryland)  

Broader source: Energy.gov [DOE]

This legislation enables the state's entrance into the Susquehanna River Basin Compact, which provides for the conservation, development, and administration of the water resources of the...

90

Nonlinear seismic response analysis of steel-concrete composite frames  

E-Print Network [OSTI]

of nonlinear steel- concrete composite beam ele- ment. ”Tests and analysis of composite beams with incom- pleteElementary Behaviour of Composite Steel and Concrete Struc-

Barbato, Michele

2008-01-01T23:59:59.000Z

91

Sequestration of CO2 by Concrete Carbonation  

Science Journals Connector (OSTI)

Sequestration of CO2 by Concrete Carbonation ... Carbonation of reinforced concrete is one of the causes of corrosion, but it is also a way to sequester CO2. ... This work attempts to advance the knowledge of the carbon footprint of cement. ...

Isabel Galan; Carmen Andrade; Pedro Mora; Miguel A. Sanjuan

2010-03-12T23:59:59.000Z

92

Performance of Reinforced Concrete Column Lap Splices  

E-Print Network [OSTI]

the reinforcement and the surrounding concrete, and a factor depending on the section detailing. However, the effects of concrete deterioration due to alkali silica reaction (ASR) and/or delayed ettringite formation (DEF) may weaken the bond of the splice region...

Alberson, Ryan M.

2010-01-14T23:59:59.000Z

93

SURVEY OF MODELS FOR CONCRETE DEGRADATION  

SciTech Connect (OSTI)

Concrete has been used in the construction of nuclear facilities because of two primary properties: its structural strength and its ability to shield radiation. Concrete structures have been known to last for hundreds of years, but they are also known to deteriorate in very short periods of time under adverse conditions. The use of concrete in nuclear facilities for containment and shielding of radiation and radioactive materials has made its performance crucial for the safe operation of the facility. The goal of this report is to review and document the main aging mechanisms of concern for concrete structures in nuclear power plants (NPPs) and the models used in simulations of concrete aging and structural response of degraded concrete structures. This is in preparation for future work to develop and apply models for aging processes and response of aged NPP concrete structures in the Grizzly code. To that end, this report also provides recommendations for developing more robust predictive models for aging effects of performance of concrete.

Spencer, Benjamin W [Idaho National Laboratory; Huang, Hai [Idaho Nation Laboratory

2014-08-01T23:59:59.000Z

94

Stability design of long precast concrete beams  

E-Print Network [OSTI]

Stability design of long precast concrete beams T. J. Stratford, BA, MEng, C. J. Burgoyne BA, MSc needed for design engineers to check the stability of precast concrete beams when simply supported loads can be determined and how estimates can be made of the eect of imperfections both in the beam

Burgoyne, Chris

95

Lateral stability of long precast concrete beams  

E-Print Network [OSTI]

Lateral stability of long precast concrete beams T. J. Stratford, BA, BEng, and C. J. Burgoyne, BA, MSc, CEng, MICE & Modern precast concrete bridge beams are becoming increasingly long and slender, making them more susceptible to buckling failure. This paper shows that once the beam is positioned

Burgoyne, Chris

96

Quick-setting concrete and a method for making quick-setting concrete  

SciTech Connect (OSTI)

This invention relates to a method for producing concrete, and more specifically, this invention relates to a method for producing quick-setting concrete while simultaneously minimizing the release of carbon dioxide to the atmosphere, said release of carbon dioxide inherent in cement production. A method for producing quick setting concrete comprises hydrating a concrete dry mixture with carbonate solution to create a slurry, and allowing the slurry to cure. The invention also provides for a quick setting concrete having a predetermined proportion of CaCO{sub 3} of between 5 and 23 weight percent of the entire concrete mixture, and whereby the concrete has a compression strength of approximately 4,000 pounds per square inch (psi) within 24 hours after pouring.

Wagh, A.S.; Singh, D.; Pullockaran, J.D.; Knox, L.

1995-12-31T23:59:59.000Z

97

Radionuclide Retention in Concrete Wasteforms  

SciTech Connect (OSTI)

Assessing long-term performance of Category 3 waste cement grouts for radionuclide encasement requires knowledge of the radionuclide-cement interactions and mechanisms of retention (i.e., sorption or precipitation); the mechanism of contaminant release; the significance of contaminant release pathways; how wasteform performance is affected by the full range of environmental conditions within the disposal facility; the process of wasteform aging under conditions that are representative of processes occurring in response to changing environmental conditions within the disposal facility; the effect of wasteform aging on chemical, physical, and radiological properties; and the associated impact on contaminant release. This knowledge will enable accurate prediction of radionuclide fate when the wasteforms come in contact with groundwater. Data collected throughout the course of this work will be used to quantify the efficacy of concrete wasteforms, similar to those used in the disposal of LLW and MLLW, for the immobilization of key radionuclides (i.e., uranium, technetium, and iodine). Data collected will also be used to quantify the physical and chemical properties of the concrete affecting radionuclide retention.

Wellman, Dawn M.; Jansik, Danielle P.; Golovich, Elizabeth C.; Cordova, Elsa A.

2012-09-24T23:59:59.000Z

98

Compact vacuum insulation  

DOE Patents [OSTI]

An ultra-thin compact vacuum insulation panel is comprised of two hard, but bendable metal wall sheets closely spaced apart from each other and welded around the edges to enclose a vacuum chamber. Glass or ceramic spacers hold the wall sheets apart. The spacers can be discrete spherical beads or monolithic sheets of glass or ceramic webs with nodules protruding therefrom to form essentially "point" or "line" contacts with the metal wall sheets. In the case of monolithic spacers that form "line" contacts, two such spacers with the line contacts running perpendicular to each other form effectively "point" contacts at the intersections. Corrugations accommodate bending and expansion, tubular insulated pipes and conduits, and preferred applications are also included.

Benson, David K. (Golden, CO); Potter, Thomas F. (Denver, CO)

1993-01-01T23:59:59.000Z

99

Compact vacuum insulation embodiments  

DOE Patents [OSTI]

An ultra-thin compact vacuum insulation panel is comprised of two hard, but bendable metal wall sheets closely spaced apart from each other and welded around the edges to enclose a vacuum chamber. Glass or ceramic spacers hold the wall sheets apart. The spacers can be discrete spherical beads or monolithic sheets of glass or ceramic webs with nodules protruding therefrom to form essentially "point" or "line" contacts with the metal wall sheets. In the case of monolithic spacers that form "line" contacts, two such spacers with the line contacts running perpendicular to each other form effectively "point" contacts at the intersections. Corrugations accommodate bending and expansion, tubular insulated pipes and conduits, and preferred applications are also included.

Benson, David K. (Golden, CO); Potter, Thomas F. (Denver, CO)

1992-01-01T23:59:59.000Z

100

Compact vacuum insulation  

DOE Patents [OSTI]

An ultra-thin compact vacuum insulation panel is comprised of two hard, but bendable metal wall sheets closely spaced apart from each other and welded around the edges to enclose a vacuum chamber. Glass or ceramic spacers hold the wall sheets apart. The spacers can be discrete spherical beads or monolithic sheets of glass or ceramic webs with nodules protruding therefrom to form essentially point'' or line'' contacts with the metal wall sheets. In the case of monolithic spacers that form line'' contacts, two such spacers with the line contacts running perpendicular to each other form effectively point'' contacts at the intersections. Corrugations accommodate bending and expansion, tubular insulated pipes and conduits, and preferred applications are also included.

Benson, D.K.; Potter, T.F.

1993-01-05T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Nonlinear dispersion and compact structures  

SciTech Connect (OSTI)

Relaxing the distinguished ordering underlying the derivation of soliton supporting equations leads to new equations endowed with nonlinear dispersion crucial for the formation and coexistence of compactons, solitons with a compact support, and conventional solitons. Vibrations of the anharmonic mass-spring chain lead to a new Boussinesq equation admitting compactons and compact breathers. The model equation [ital u][sub [ital t

Rosenau, P. (Technion, Haifa 32000 (Israel) Center For Nonlinear Studies, MS-B258 Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States))

1994-09-26T23:59:59.000Z

102

A Compact Ring Design with Tunable Momentum Compaction  

SciTech Connect (OSTI)

A storage ring with tunable momentum compaction has the advantage in achieving different RMS bunch length with similar RF capacity, which is potentially useful for many applications, such as linear collider damping ring and predamping ring where injected beam has a large energy spread and a large transverse emittance. A tunable bunch length also makes the commissioning and fine tuning easier in manipulating the single bunch instabilities. In this paper, a compact ring design based on a supercell is presented, which achieves a tunable momentum compaction while maintaining a large dynamic aperture.

Sun, Y.; /SLAC; ,

2012-05-17T23:59:59.000Z

103

Compact vacuum insulation  

DOE Patents [OSTI]

Improved compact insulation panel is provided which is comprised of two adjacent metal sheets spaced close together with a plurality of spherical, or other discretely shaped, glass or ceramic beads optimally positioned between the sheets to provide support and maintain the spacing between the metal sheets when the gases there between are evacuated to form a vacuum. These spherical glass beads provide the maximum support while minimizing thermal conductance. In its preferred embodiment; these two metal sheets are textured with ribs or concave protrusions in conjunction with the glass beads to maximize the structural integrity of the panels while increasing the spacing between beads, thereby reducing the number of beads and the number of thermal conduction paths. Glass or porcelain-enameled liners in combination with the glass spacers and metal sidewalls effectively decrease thermal conductivity, and various laminates, including wood, porcelain-enameled metal, and others effectively increase the strength and insulation capabilities of the panels. Also, a metal web is provided to hold the spacers in place, and strategic grooves are shown to accommodate expansion and contraction or shaping of the panels. 35 figs.

Benson, D.K.; Potter, T.F.

1992-10-27T23:59:59.000Z

104

Compact vacuum insulation  

DOE Patents [OSTI]

Improved compact insulation panel is provided which is comprised of two adjacent metal sheets spaced close together with a plurality of spherical, or other discretely shaped, glass or ceramic beads optimally positioned between the sheets to provide support and maintain the spacing between the metal sheets when the gases therebetween are evacuated to form a vacuum. These spherical glass beads provide the maximum support while minimizing thermal conductance. In its preferred embodiment; these two metal sheets are textured with ribs or concave protrusions in conjunction with the glass beads to maximize the structural integrity of the panels while increasing the spacing between beads, thereby reducing the number of beads and the number of thermal conduction paths. Glass or porcelain-enameled liners in combination with the glass spacers and metal sidewalls effectively decrease thermal conductivity, and variious laminates, including wood, porcelain-enameled metal, and others effectively increase the strength and insulation capabilities of the panels. Also, a metal web is provided to hold the spacers in place, and strategic grooves are shown to accommodate expansion and contraction or shaping of the panels.

Benson, David K. (Golden, CO); Potter, Thomas F. (Denver, CO)

1992-01-01T23:59:59.000Z

105

Carbon dioxide sequestration in concrete in different curing environments  

E-Print Network [OSTI]

Carbon dioxide sequestration in concrete in different curing environments Y.-m. Chun, T.R. Naik, USA ABSTRACT: This paper summarizes the results of an investigation on carbon dioxide (CO2) sequestration in concrete. Concrete mixtures were not air entrained. Concrete mixtures were made containing

Wisconsin-Milwaukee, University of

106

Compaction managed mirror bend achromat  

DOE Patents [OSTI]

A method for controlling the momentum compaction in a beam of charged particles. The method includes a compaction-managed mirror bend achromat (CMMBA) that provides a beamline design that retains the large momentum acceptance of a conventional mirror bend achromat. The CMMBA also provides the ability to tailor the system momentum compaction spectrum as desired for specific applications. The CMMBA enables magnetostatic management of the longitudinal phase space in Energy Recovery Linacs (ERLs) thereby alleviating the need for harmonic linearization of the RF waveform.

Douglas, David (Yorktown, VA)

2005-10-18T23:59:59.000Z

107

Corrosion rate of steel reinforcement in concrete in seawater and influence of concrete crack width.  

E-Print Network [OSTI]

??This thesis reports a research of the corrosion mechanism and corrosion rate of steel reinforcement in concrete. Experimental results are presented to compare the corrosion… (more)

Chang, Zhen-Tian

2007-01-01T23:59:59.000Z

108

Progress Update: H4 Basin Concrete Pour  

ScienceCinema (OSTI)

The Recovery Act funded project in the H area basin. A concrete ditch built longer than half a mile to prevent contaminated water from expanding and to reduce the footprint on the environment.

None

2012-06-14T23:59:59.000Z

109

Neutron scattering in concrete and wood  

Science Journals Connector (OSTI)

......Article Computational techniques Neutron scattering in concrete and wood A. Facure...library were used to simulate the neutron scattering in barriers of conventional...of the barrier thickness on neutron scattering factors is also being studied......

A. Facure; A. X. Silva; R. C. Falcão; V. R. Crispim

2006-09-01T23:59:59.000Z

110

Preferred orientation of ettringite in concrete fractures  

Science Journals Connector (OSTI)

Hard synchrotron X-ray microdiffraction is used to quantify the orientation distribution of ettringite crystals [Ca6Al2(OH)12(SO4)3·26H2O], which cause cracking and loss of strength in concrete structures.

Wenk, H.-R.

2009-05-15T23:59:59.000Z

111

Why Compact Tori for Fusion?  

Science Journals Connector (OSTI)

A compact torus (CT) has a toroidal magnetic and plasma geometry, but is contained within a simply-connected vacuum vessel such as a cylinder. Spheromaks and field-reversed configurations fall into this catego...

S. Woodruff; M. Brown; E. B. Hooper; R. Milroy; M. Schaffer

2010-10-01T23:59:59.000Z

112

New considerations for compact cyclotrons  

E-Print Network [OSTI]

A compact cyclotron built with superconducting magnets could be a transformative solution to many scientific problems facing the defense, medical, and energy industries today. This thesis discusses three potential applications ...

Marshall, Eric S. (Eric Scott)

2012-01-01T23:59:59.000Z

113

MESOSCALE SIMULATIONS OF POWDER COMPACTION  

SciTech Connect (OSTI)

Mesoscale 3D simulations of shock compaction of metal and ceramic powders have been performed with an Eulerian hydrocode GEODYN. The approach was validated by simulating a well-characterized shock compaction experiment of a porous ductile metal. Simulation results using the Steinberg material model and handbook values for solid 2024 aluminum showed good agreement with experimental compaction curves and wave profiles. Brittle ceramic materials are not as well studied as metals, so a simple material model for solid ceramic (tungsten carbide) has been calibrated to match experimental compaction curves. Direct simulations of gas gun experiments with ceramic powders have been performed and showed good agreement with experimental data. The numerical shock wave profile has same character and thickness as that measured experimentally using VISAR. The numerical results show reshock states above the single-shock Hugoniot line as observed in experiments. We found that for good quantitative agreement with experiments 3D simulations are essential.

Lomov, Ilya; Fujino, Don; Antoun, Tarabay; Liu, Benjamin [Lawrence Livermore National Laboratory, P. O. Box 808, Livermore CA 94551 (United States)

2009-12-28T23:59:59.000Z

114

Consolidation of continuously reinforced concrete pavements  

E-Print Network [OSTI]

CONSOLIDATION OF CONTINUOUSLY REINFORCED CONCRETE PAVEMENTS A Thesis by DAN PARKER MINN Submitted to the Graduate College of Texas A & M University in partial fulfillment of the requirements for the degree of ASTER OF SCIENCE MAY 1984 M aj... or Subject: Civil Engineering CONSOLIDATION OF CONTINUOUSLY REINFORCED CONCRETE PAVEMENTS A Thesis by DAN PARKER WINN Approved as to style and content by: W. B. Ledbetter (Chairman of Committee) eor e Stukhart (M ember) P&r~ ~ Mikael P. J. Olsen...

Winn, Dan Parker

2012-06-07T23:59:59.000Z

115

Variability in properties of Salado Mass Concrete  

SciTech Connect (OSTI)

Salado Mass Concrete (SMC) has been developed for use as a seal component in the Waste Isolation Pilot Plant. This concrete is intended to be mixed from pre-bagged materials, have an initial slump of 10 in., and remain pumpable and placeable for two hours after mixing. It is a mass concrete because it will be placed in monoliths large enough that the heat generated during cement hydration has the potential to cause thermal expansion and subsequent cracking, a phenomenon to avoid in the seal system. This report describes effects on concrete properties of changes in ratio of water to cement, batch size, and variations in characteristics of different lots of individual components of the concrete. The research demonstrates that the concrete can be prepared from laboratory-batched or pre-bagged dry materials in batches from 1.5 ft{sup 3} to 5.0 yd{sup 3}, with no chemical admixtures other than the sodium chloride added to improve bonding with the host rock, at a water-to-cement ratio ranging from 0.36 to 0.42. All batches prepared according to established procedures had adequate workability for at least 1.5 hours, and achieved or exceeded the target compressive strength of 4500 psi at 180 days after casting. Portland cement and fly ash from different lots or sources did not have a measurable effect on concrete properties, but variations in a shrinkage-compensating cement used as a component of the concrete did appear to affect workability. A low initial temperature and the water-reducing and set-retarding functions of the salt are critical to meeting target properties.

Wakeley, L.D.; Harrington, P.T. [US Army Engineer Waterways Experiment Station, Vicksburg, MS (United States); Hansen, F.D. [Sandia National Labs., Albuquerque, NM (United States)

1995-08-01T23:59:59.000Z

116

Shrinkage - cracking characteristics of structural lightweight concrete  

E-Print Network [OSTI]

making average conditions meaningless with respect to shrinkage con- siderations. At this time there is no reliable method of evaluating the influence of a normal environment on concrete due to ' ts char- acteristic wet-dry cycling. The following list... making average conditions meaningless with respect to shrinkage con- siderations. At this time there is no reliable method of evaluating the influence of a normal environment on concrete due to ' ts char- acteristic wet-dry cycling. The following list...

McKeen, Robert Gordon

2012-06-07T23:59:59.000Z

117

Energy Efficiency Improvement and Cost Saving Oportunities for the Concrete Industry  

E-Print Network [OSTI]

cooling concrete with ice, and cooling concrete with liquidcooling concrete with ice, 4) cooling coarse aggregates andcost-effective than cooling water with ice (Lee, 1989). Pre-

Kermeli, Katerina

2013-01-01T23:59:59.000Z

118

Interstate Mining Compact (Maryland) | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

You are here You are here Home » Interstate Mining Compact (Maryland) Interstate Mining Compact (Maryland) < Back Eligibility Commercial Developer Investor-Owned Utility Municipal/Public Utility Rural Electric Cooperative Utility Program Info State Maryland Program Type Environmental Regulations Provider Interstate Mining Compact Commission This legislation authorizes the state's entrance into the Interstate Mining Compact, a multi-state governmental agency / organization that represents the natural resource and related environmental protection interests of its member states. Currently, 23 states are members to the compact, and 6 additional states are associate members. The compact is administered by the Interstate Mining Compact Commission, which does not possess regulatory

119

3 - Life cycle assessment (LCA) aspects of concrete  

Science Journals Connector (OSTI)

Abstract: The concrete industry is considered to be a large consumer of energy and natural resources, and is one of the main sources of greenhouse emissions and waste generation. The production and utilization of concrete and concrete structures have a large impact on the environment, and so the environmental assessment of concrete is of great importance in terms of achieving a sustainable society. This chapter includes instructions on how to apply the life cycle assessment (LCA) methodology to concrete, including a general description, life cycle inventory and life cycle impact assessment of concrete, future trends and sources of further information.

S.B. Marinkovi?

2013-01-01T23:59:59.000Z

120

Evaluation of irradiation effects on concrete structure  

SciTech Connect (OSTI)

In assessing the soundness of irradiated concrete of nuclear power plants operated for more than 30 years, reference levels are employed: 1x10{sup 20} n/cm{sup 2} for fast neutrons and 2x10{sup 10} rad (2x10{sup 5} kGy) for gamma rays. Concrete structures are regarded as sound when the estimated irradiance levels after 60 years of operation are less than the reference levels. The reference levels were obtained from a paper by Hilsdorf. It was found, however, that the test conditions in which data were obtained by the researchers referred in that paper are very different from the irradiation and heat conditions usually found in a Light Water Reactor (LWR), and therefore aren't appropriate for assessing the soundness of irradiated concrete of an LWR. This paper investigates the interactions between radiation and concrete and presents the results of gamma ray irradiation tests on cement paste samples in order to provide a better understanding of the irradiation effects on concrete. (authors)

Kontani, O.; Ishizawa, A. [Kajima Corporation, Nuclear Power Dept., 6-5-11 Akasaka, Minato-ku, Tokyo, 107-8348 (Japan); Maruyama, I. [Nagoya Univ., Graduate School of Environmental Studies, Furocho, Chikusa-ku, Nagoya , 464-8603 (Japan); Takizawa, M.; Sato, O. [Mitsubishi Research Inst. Inc., Science and Safety Policy Research Div., Nuclear Energy Systems Group, 2-10-3 Nagatacho, Chiyoda-ku, Tokyo 100-8141 (Japan)

2012-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Compact orthogonal NMR field sensor  

DOE Patents [OSTI]

A Compact Orthogonal Field Sensor for emitting two orthogonal electro-magnetic fields in a common space. More particularly, a replacement inductor for existing NMR (Nuclear Magnetic Resonance) sensors to allow for NMR imaging. The Compact Orthogonal Field Sensor has a conductive coil and a central conductor electrically connected in series. The central conductor is at least partially surrounded by the coil. The coil and central conductor are electrically or electro-magnetically connected to a device having a means for producing or inducing a current through the coil and central conductor. The Compact Orthogonal Field Sensor can be used in NMR imaging applications to determine the position and the associated NMR spectrum of a sample within the electro-magnetic field of the central conductor.

Gerald, II, Rex E. (Brookfield, IL); Rathke, Jerome W. (Homer Glen, IL)

2009-02-03T23:59:59.000Z

122

Electric Transmission Line Siting Compact  

Broader source: Energy.gov (indexed) [DOE]

Electric Transmission Line Siting Compact Electric Transmission Line Siting Compact 1 ______________________________________________________________________________ 2 ARTICLE I 3 PURPOSE 4 5 Siting electric transmission lines across state borders and federal lands is an issue for states, the 6 federal government, transmission utilities, consumers, environmentalists, and other stakeholders. 7 The current, multi-year application review process by separate and equal jurisdictions constitutes 8 a sometimes inefficient and redundant process for transmission companies and complicates the 9 efforts of state and federal policy-makers and other stakeholders to develop more robust 10 economic opportunities, increase grid reliability and security, and ensure the consumers have the 11 lowest cost electricity possible. 12

123

Compact monolithic capacitive discharge unit  

DOE Patents [OSTI]

A compact monolithic capacitive discharge unit (CDU) is disclosed in which a thyristor switch and a flyback charging circuit are both sandwiched about a ceramic energy storage capacitor. The result is a compact rugged assembly which provides a low-inductance current discharge path. The flyback charging circuit preferably includes a low-temperature co-fired ceramic transformer. The CDU can further include one or more ceramic substrates for enclosing the thyristor switch and for holding various passive components used in the flyback charging circuit. A load such as a detonator can also be attached directly to the CDU.

Roesler, Alexander W. (Tijeras, NM); Vernon, George E. (Rio Rancho, NM); Hoke, Darren A. (Albuquerque, NM); De Marquis, Virginia K. (Tijeras, NM); Harris, Steven M. (Albuquerque, NM)

2007-06-26T23:59:59.000Z

124

Nuclear Concrete Materials Database Phase I Development  

SciTech Connect (OSTI)

The FY 2011 accomplishments in Phase I development of the Nuclear Concrete Materials Database to support the Light Water Reactor Sustainability Program are summarized. The database has been developed using the ORNL materials database infrastructure established for the Gen IV Materials Handbook to achieve cost reduction and development efficiency. In this Phase I development, the database has been successfully designed and constructed to manage documents in the Portable Document Format generated from the Structural Materials Handbook that contains nuclear concrete materials data and related information. The completion of the Phase I database has established a solid foundation for Phase II development, in which a digital database will be designed and constructed to manage nuclear concrete materials data in various digitized formats to facilitate electronic and mathematical processing for analysis, modeling, and design applications.

Ren, Weiju [ORNL; Naus, Dan J [ORNL

2012-05-01T23:59:59.000Z

125

Illinois: Ozinga Concrete Runs on Natural Gas and Opens Private...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Illinois: Ozinga Concrete Runs on Natural Gas and Opens Private Station Illinois: Ozinga Concrete Runs on Natural Gas and Opens Private Station November 6, 2013 - 12:00am Addthis...

126

Set in stone? A perspective on the concrete sustainability challenge  

E-Print Network [OSTI]

As the most abundant engineered material on Earth, concrete is essential to the physical infrastructure of all modern societies. There are no known materials that can replace concrete in terms of cost and availability. ...

Vliet, Krystyn Van J.

127

Automated crack control analysis for concrete pavement construction  

E-Print Network [OSTI]

The focus of this research is on the control of random cracking in concrete paving by using sawcut notch locations in the early stages of construction. This is a major concern in concrete pavement construction. This research also addresses a...

Jang, Se Hoon

2005-11-01T23:59:59.000Z

128

Effect of Materials and Curing Period on Shrinkage of Concrete  

E-Print Network [OSTI]

The ASTM C157 free shrinkage test is used to evaluate the effects of mix proportioning parameters and curing on concrete shrinkage with the goal of providing recommendations that will reduce concrete shrinkage in bridge decks. Specimens are dried up...

West, Maria B.

2010-02-04T23:59:59.000Z

129

Analytical modeling of composite steel-concrete frame systems  

E-Print Network [OSTI]

of reinforced concrete or composite steel shapes encased in reinforced concrete (SRC), structural steel beams, and composite beam-column joints. To facilitate the modeling of inelastic deformations in joint regions, a panel element capable of representing joint...

Atahan, Ali Osman

1996-01-01T23:59:59.000Z

130

Detection Of Concrete Deterioration By Staining  

DOE Patents [OSTI]

A method using concentrated aqueous solutions of sodium cobaltinitrite and a rhodamine dye is described which can be used to identify concrete that contains gels formed by the alkali-silica reaction (ASR), and to identify degraded concrete which results in a porous or semi-permeable paste due to carbonation or leaching. These solutions present little health or environmental risk, are readily applied, and rapidly discriminate between two chemically distinct gels; K-rich, Na--K--Ca--Si gels are identified by yellow staining, and alkali-poor, Ca--Si gels are identified by pink staining.

Guthrie, Jr., George D. (Santa Fe, NM); Carey, J. William (Santa Fe, NM)

1999-09-21T23:59:59.000Z

131

Hyperbolic capture of compact binaries  

E-Print Network [OSTI]

Hyperbolic encounters of compact objects are common interactions in dense environments. During this process a significant amount of gravitational radiation is emitted depending on the parameters of the system. Here we give a parametric description of the radial motion valid for general binary orbits and the radiative energy and angular momentum losses for binaries with spinning components.

Mátyás Vasúth

2014-09-23T23:59:59.000Z

132

Mesoscale Simulations of Power Compaction  

SciTech Connect (OSTI)

Mesoscale 3D simulations of metal and ceramic powder compaction in shock waves have been performed with an Eulerian hydrocode GEODYN. The approach was validated by simulating shock compaction of porous well-characterized ductile metal using Steinberg material model. Results of the simulations with handbook values for parameters of solid 2024 aluminum have good agreement with experimental compaction curves and wave profiles. Brittle ceramic materials are not so well studied as metals, so material model for ceramic (tungsten carbide) has been fitted to shock compression experiments of non-porous samples and further calibrated to match experimental compaction curves. Direct simulations of gas gun experiments with ceramic powder have been performed and showed good agreement with experimental data. Numerical shock wave profile has same character and thickness as measured with VISAR. Numerical results show reshock states above the single-shock Hugoniot line also observed in experiments. They found that to receive good quantitative agreement with experiment it is essential to perform 3D simulations.

Lomov, I; Fujino, D; Antoun, T; Liu, B

2009-08-06T23:59:59.000Z

133

Shale compaction and statistical physics  

Science Journals Connector (OSTI)

......compaction is an irreversible process where clay particles...Louisiana, Prog. Ann. mtg, geol. Soc. Am...approach to the utilization processes of mineral resources...Louisiana, Prog. Ann. mtg,geol. SOC. Am...approach to the utilization processes of mineral resources......

G. Korvin

1984-07-01T23:59:59.000Z

134

Morley Symposium on Concrete Plasticity and its Application. University of Cambridge 23 PLASTICITY APPLICATIONS IN REINFORCED CONCRETE AND  

E-Print Network [OSTI]

a range of reinforced and or prestressed concrete structures consisting of tower crane foundations, wind: plasticity, prestressed concrete, serviceability, turbine foundation, offshore structures 1 INTRODUCTION turbine foundations, building floors and offshore structures. The case studies have been chosen based

Burgoyne, Chris

135

Concrete and Sustainable Development Special Publication ACI 206, 2002  

E-Print Network [OSTI]

friendly construction; fly ash; green buildings; recycling; supplementary cementing materials; sustainableC. Meyer Concrete and Sustainable Development 1 Special Publication ACI 206, 2002 Concrete Hills, MI Concrete and Sustainable Development By C. Meyer Synopsis: The United States is a country

Meyer, Christian

136

Glass Concrete Thin Sheets Reinforced with Prestressed Aramid Fabrics  

E-Print Network [OSTI]

Glass Concrete Thin Sheets Reinforced with Prestressed Aramid Fabrics Gregor Vilkner Submitted Glass Concrete Thin Sheets Reinforced with Prestressed Aramid Fabrics Gregor Vilkner Thin sheet concrete crushed glass as aggregate, a multitude of different esthetic effects can be produced, which again open up

Meyer, Christian

137

Charlton Compact Power Ltd | Open Energy Information  

Open Energy Info (EERE)

Charlton Compact Power Ltd Charlton Compact Power Ltd Jump to: navigation, search Name Charlton Compact Power Ltd Place Frome, England, United Kingdom Zip BA11 2RH Sector Biomass Product A joint venture between A. J. Charlton & Sons and Compact Power to develop a 3.6MW to 4.5MW biomass plant in Somerset. References Charlton Compact Power Ltd[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Charlton Compact Power Ltd is a company located in Frome, England, United Kingdom . References ↑ "Charlton Compact Power Ltd" Retrieved from "http://en.openei.org/w/index.php?title=Charlton_Compact_Power_Ltd&oldid=343457" Categories: Clean Energy Organizations Companies Organizations

138

Interstate Oil and Gas Conservation Compact (Montana)  

Broader source: Energy.gov [DOE]

This legislation authorizes the State to join the Interstate Compact for the Conservation of Oil and Gas. The Compact is an agreement that has been entered into by 30 oil- and gas-producing states,...

139

SPALL FRACTURE AND SPALL FRACTURE AND COMPACTION COMPACTION  

National Nuclear Security Administration (NNSA)

SPALL FRACTURE AND SPALL FRACTURE AND SPALL FRACTURE AND SPALL FRACTURE AND COMPACTION COMPACTION IN NATURAL URANIUM IN NATURAL URANIUM UNDER SHOCK UNDER SHOCK - - WAVE LOADING WAVE LOADING O.A. O.A. Tyupanova Tyupanova , S.S. , S.S. Nadezhin Nadezhin , A.N. , A.N. Malyshev Malyshev , , O.N. O.N. Ignatova Ignatova , V.I. , V.I. Skokov Skokov , V.N. , V.N. Knyazev Knyazev , , V.A. V.A. Raevsky Raevsky , N.A. , N.A. Yukina Yukina Russian Federal Nuclear Center Russian Federal Nuclear Center - - VNIIEF, VNIIEF, Sarov Sarov , Russia , Russia Introduction Introduction  Nucleation and growth of defects inside a solid under pulse tensile stresses signify a necessity to consider it as a damaged medium.  A certain volume of experimental data, obtained in correct tests, which are sensitive to a characteristic under study, is necessary

140

NDT data fusion for evaluating concrete structures  

SciTech Connect (OSTI)

Simultaneous estimation of porosity rate and water saturation is studied for undamaged concrete. Data fusion based on possibility theory is selected to deal with imprecise and uncertain available data, and with the need of quantitative estimation of indicators. Applications provide a good agreement between predicted and expected values of porosity and saturation.

Ploix, M. A.; Garnier, V.; Moysan, J. [LCND, Universite de la Mediterranee, Avenue Gaston Berger, 13625 Aix-en-Provence Cedex (France); Breysse, D. [GHYMAC, Universite de Bordeaux 1, Avenue des facultes, 33400 Talence (France)

2011-06-23T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Implementation Plan and Initial Development of Nuclear Concrete Materials  

Broader source: Energy.gov (indexed) [DOE]

Implementation Plan and Initial Development of Nuclear Concrete Implementation Plan and Initial Development of Nuclear Concrete Materials Database for Light Water Reactor Sustainability Program Implementation Plan and Initial Development of Nuclear Concrete Materials Database for Light Water Reactor Sustainability Program The FY10 activities for development of a nuclear concrete materials database to support the Light Water Reactor Sustainability Program are summarized. The database will be designed and constructed using the ORNL materials database infrastructure established for the Gen IV Materials Handbook to achieve cost reduction and development efficiency. In Phase I, a static database will be developed to manage searchable documents from the Structural Materials Handbook that contains information on nuclear concrete

142

Implementation Plan and Initial Development of Nuclear Concrete Materials  

Broader source: Energy.gov (indexed) [DOE]

Implementation Plan and Initial Development of Nuclear Concrete Implementation Plan and Initial Development of Nuclear Concrete Materials Database for Light Water Reactor Sustainability Program Implementation Plan and Initial Development of Nuclear Concrete Materials Database for Light Water Reactor Sustainability Program The FY10 activities for development of a nuclear concrete materials database to support the Light Water Reactor Sustainability Program are summarized. The database will be designed and constructed using the ORNL materials database infrastructure established for the Gen IV Materials Handbook to achieve cost reduction and development efficiency. In Phase I, a static database will be developed to manage searchable documents from the Structural Materials Handbook that contains information on nuclear concrete

143

Concrete decontamination by Electro-Hydraulic Scabbling (EHS)  

SciTech Connect (OSTI)

EHS is being developed for decontaminating concrete structures from radionuclides, organic substances, and hazardous metals. EHS involves the generation of powerful shock waves and intense cavitation by a strong pulsed electric discharge in a water layer at the concrete surface; high impulse pressure results in stresses which crack and peel off a concrete layer of controllable thickness. Scabbling produces contaminated debris of relatively small volume which can be easily removed, leaving clean bulk concrete. Objective of Phase I was to prove the technical feasibility of EH for controlled scabbling and decontamination of concrete. Phase I is complete.

NONE

1994-11-01T23:59:59.000Z

144

Earth pressures on reinforced concrete box culverts  

E-Print Network [OSTI]

Construction 2. 5 Instrumentation 2. 6 Backfill and Roadbed Construction CHAPTER III EXPERIMENT DESIGN 3. 1 Fill Height Selection 3. 2 Live Load and Truck Selection 3. 3 Load Location Notation 3. 4 Live Load Location Selection 3. 5 Instrument Location... walls are dependent upon compaction of the backfill soil and differential movement between the structure and soil. Thus, this information is primarily useful in determining if compaction of the backfill soil or differential movement between...

Brown, Dale Evan

2012-06-07T23:59:59.000Z

145

An Alternative Mechanism for Accelerated Carbon Sequestration in Concrete  

SciTech Connect (OSTI)

The increased rate of carbon dioxide sequestration (carbonation) is desired in many primary and secondary life applications of concrete in order to make the life cycle of concrete structures more carbon neutral. Most carbonation rate studies have focused on concrete exposed to air under various conditions. An alternative mechanism for accelerated carbon sequestration in concrete was investigated in this research based on the pH change of waters in contact with pervious concrete which have been submerged in carbonate laden waters. The results indicate that the concrete exposed to high levels of carbonate species in water may carbonate faster than when exposed to ambient air, and that the rate is higher with higher concentrations. Validation of increased carbon dioxide sequestration was also performed via thermogravimetric analysis (TGA). It is theorized that the proposed alternative mechanism reduces a limiting rate effect of carbon dioxide dissolution in water in the micro pores of the concrete.

Haselbach, Liv M.; Thomle, Jonathan N.

2014-07-01T23:59:59.000Z

146

Compact portable diffraction moire interferometer  

DOE Patents [OSTI]

A compact and portable moire interferometer used to determine surface deformations of an object. The improved interferometer is comprised of a laser beam, optical and fiber optics devices coupling the beam to one or more evanescent wave splitters, and collimating lenses directing the split beam at one or more specimen gratings. Observation means including film and video cameras may be used to view and record the resultant fringe patterns.

Deason, Vance A. (Shelley, ID); Ward, Michael B. (Idaho Falls, ID)

1989-01-01T23:59:59.000Z

147

Compact portable diffraction moire interferometer  

DOE Patents [OSTI]

A compact and portable moire interferometer used to determine surface deformations of an object. The improved interferometer is comprised of a laser beam, optical and fiber optics devices coupling the beam to one or more evanescent wave splitters, and collimating lenses directing the split beam at one or more specimen gratings. Observations means including film and video cameras may be used to view and record the resultant fringe patterns. 7 figs.

Deason, V.A.; Ward, M.B.

1988-05-23T23:59:59.000Z

148

Laboratory compaction of cohesionless sands  

E-Print Network [OSTI]

size analysis and compaction testing. The sample preparation procedure followed that specified by ASTM (1998), Designation D 421-85. Sieve Analysis The grain size distribution of the soil samples was determined using a sieve anlaysis. The sieve... analysis procedure followed that specified by ASTM (1998), Designation D 422-90. The results of the sieve analysis were analyzed graphically on a semilogarithmic plot 18 by graphing the percent passing a given sieve versus the grain diameter. The scale...

Delphia, John Girard

2012-06-07T23:59:59.000Z

149

Compact magnetic energy storage module  

DOE Patents [OSTI]

A superconducting compact magnetic energy storage module in which a plurality of superconducting toroids, each having a toroidally wound superconducting winding inside a poloidally wound superconducting winding, are stacked so that the flow of electricity in each toroidally wound superconducting winding is in a direction opposite from the direction of electrical flow in other contiguous superconducting toroids. This allows for minimal magnetic pollution outside of the module.

Prueitt, Melvin L. (Los Alamos, NM)

1994-01-01T23:59:59.000Z

150

Compact magnetic energy storage module  

DOE Patents [OSTI]

A superconducting compact magnetic energy storage module in which a plurality of superconducting toroids, each having a toroidally wound superconducting winding inside a poloidally wound superconducting winding, are stacked so that the flow of electricity in each toroidally wound superconducting winding is in a direction opposite from the direction of electrical flow in other contiguous superconducting toroids. This allows for minimal magnetic pollution outside of the module. 4 figures.

Prueitt, M.L.

1994-12-20T23:59:59.000Z

151

Corrosion of steel reinforcement in concrete. Corrosion of mild steel bars in concrete and its effect on steel-concrete bond strength.  

E-Print Network [OSTI]

??This thesis reports on the research outcome of corrosion mechanism and corrosion rate of mild steel in different environments (saline, alkaline solutions and concrete media)… (more)

Abosrra, L. R.

2010-01-01T23:59:59.000Z

152

Canadian River Compact (Texas) | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Canadian River Compact (Texas) Canadian River Compact (Texas) Canadian River Compact (Texas) < Back Eligibility Utility Fed. Government Commercial Agricultural Investor-Owned Utility State/Provincial Govt Industrial Construction Municipal/Public Utility Local Government Residential Installer/Contractor Rural Electric Cooperative Tribal Government Low-Income Residential Schools Retail Supplier Institutional Multi-Family Residential Systems Integrator Fuel Distributor Nonprofit General Public/Consumer Transportation Savings Category Water Buying & Making Electricity Home Weatherization Program Info State Texas Program Type Siting and Permitting Provider Canadian River Compact Commission The Canadian River Commission administers the Canadian River Compact which includes the states of New Mexico, Oklahoma, and Texas. Signed in 1950 by

153

Use of POTW biosolids in bituminous concrete  

SciTech Connect (OSTI)

Although wastewater treatment helps alleviate water pollution, it creates residual by-products that can pose a disposal dilemma. Four main practices are presently employed to dispose of wastewater treatment plant sludge: land application, composting, incineration, and landfilling. A fifth disposal method that may help to alleviate the sludge disposal problem in future years is the incorporation of sludge into useful end products such as fertilizer or construction materials. This research was designed to evaluate the properties of bituminous concrete mixes that had anaerobically digested sewage sludge incorporated into their design. In doing so, it was desired to verify the work of Wells concerning sludge incorporation into bituminous concrete mixes using today`s asphalts. Hot mix and cold mix designs were studied.

Smith, R.C. [Jones and Henry Engineers, Ltd., Toledo, OH (United States); Angelbeck, D.I. [Univ. of Toledo, OH (United States)

1995-11-01T23:59:59.000Z

154

Compact bilinear operators and commutators  

E-Print Network [OSTI]

) For all bounded B1 ? X,B2 ? Y , T (B1 ×B2) is precompact. (c7) For all bounded sequences {(xn, yn)} ? X × Y , the sequence {T (xn, yn)} has a convergent subsequence. Furthermore, if Z is Banach, then (c1) is also equivalent to: (c8) For all bounded B ? X...(X ×Y, Z) ? B(X ×Y, Z), assume that the compact bilinear operator T is not bounded. Then, for some r > 0, there exists a sequence (xn, yn) ? Br,X×Y , and ?T (xn, yn)? ? ?. Thus, {T (xn, yn)} could not have a convergent subsequence, so T (Br,X×Y ) would...

Bé nyi, Á rpá d; Torres, Rodolfo H.

2013-07-01T23:59:59.000Z

155

Concrete decontamination by Electro-Hydraulic Scabbling (EHS). Topical report  

SciTech Connect (OSTI)

Electro-Hydraulic Scabbling (EHS) technology and equipment for decontaminating concrete structures from radionuclides, organic substances, and hazardous metals is being developed by Textron Systems Division (TSD). This wet scabbling technique involves the generation of powerful shock waves and intense cavitation by a strong pulsed electric discharge in a water layer at the concrete surface. The high pressure impulse results in stresses which crack and peel off a concrete layer of a controllable thickness. Scabbling produces contaminated debris of relatively small volume which can be easily removed, leaving clean bulk concrete. This new technology is being developed under Contract No. DE-AC21-93MC30164. The project objective is to develop and demonstrate a cost-efficient, rapid, controllable process to remove the surface layer of contaminated concrete while generating minimal secondary waste. The primary target of this program is uranium-contaminated concrete floors which constitute a substantial part of the contaminated area at DOE weapon facilities.

NONE

1996-03-30T23:59:59.000Z

156

Finite Element Modeling of the Fastening Systems and the Concrete  

E-Print Network [OSTI]

Sleeper and Ballast 0 500 1000 1500 2000 2500 3000 3500 4000 0.0000 0.0002 0.0004 0.0006 0.0008 0 of strands Rail seat area is between 0.39 m to 0.67 m Rail Seat Area Component Modeling: Concrete Sleeper Seat Area Position of concrete surface strain lt = 0.48 m Component Modeling: Concrete Sleeper

Barkan, Christopher P.L.

157

Method for preparing porous metal hydride compacts  

DOE Patents [OSTI]

A method for preparing porous metallic-matrix hydride compacts which can be repeatedly hydrided and dehydrided without disintegration. A mixture of a finely divided metal hydride and a finely divided matrix metal is contacted with a poison which prevents the metal hydride from dehydriding at room temperature and atmospheric pressure. The mixture of matrix metal and poisoned metal hydride is then compacted under pressure at room temperature to form porous metallic-matrix hydride compacts.

Ron, M.; Gruen, D.M.; Mendelsohn, M.H.; Sheft, I.

1980-01-21T23:59:59.000Z

158

Microsoft Word - EMDA_Volume_4_-_Concrete_Final.docx  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

room (or building) Diesel generator building Piping or electrical cable ducts or tunnels Radioactive waste storage building Stacks Intake structures (including concrete water...

159

UNIT NUMBER SWMU 175 UNIT NAME: Concrete Rubble Pile (28...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

75 UNIT NAME: Concrete Rubble Pile (28) REGULATORY STATUS: AOC LOCATION: Outside Security Fence, East of C-360 Building in KPDES Outfall Ditch 002. APPROXIMATE DIMENSIONS: 400 ft...

160

Performance Enhancement of the Automated Concrete Evaluation System (ACES)  

SciTech Connect (OSTI)

The objective of this proposed research is to improve and expand the detection and analysis capabilities of the automated, concrete evaluation (ACE) system. MoDOT and Honeywell jointly developed this system. The focus of this proposed research will be on the following: Coordination of concrete imaging efforts with other states, Validation and testing of the ACE system on a broad range of concrete samples, and Identification and development of software and hardware enhancements. These enhancements will meet the needs of diverse users in the field of concrete materials, construction, and research.

Baumgart,C.W.; Cave,S.P.; Linder,K.E.

2002-02-14T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Analysis of Thermal Energy Collection from Precast Concrete Roof Assemblies.  

E-Print Network [OSTI]

??The development of precast concrete housing systems provides an opportunity to easily and inexpensively incorporate solar energy collection by casting collector tubes into the roof… (more)

Abbott, Ashley Burnett

2004-01-01T23:59:59.000Z

162

Protecting steel in concrete in the Persian Gulf  

SciTech Connect (OSTI)

The climate and geomorphology of the Persian Gulf make it one of the world's most severe environments for reinforced concrete. The concrete mix ingredients are usually contaminated with chloride, and the environment around reinforced concrete structures also contains salts, both under- and above-ground. Prevailing high temperatures also promote rapid rates of corrosion. Fusion-bonded epoxy-coated rebar, polyvinyl butyral-based coated rebar, calcium nitrile corrosion-inhibiting admixture, and microsilica are reviewed as corrosion prevention measures for steel in concrete for Persian Gulf service. Detrimental effects and user-friendliness are discussed.

Matta, Z.G. (Specialised Industries Ltd., Sharjah (United Arab Emirates))

1994-06-01T23:59:59.000Z

163

NDE of Concrete Structures Strengthened with FRP Using Infrared Thermography  

E-Print Network [OSTI]

NDE of Concrete Structures Strengthened with FRP Using Infrared Thermography Monica A. STARNES that infrared thermography is a promising nondestructive evaluation (NDE) method considering testing speed

Entekhabi, Dara

164

Effects of environment and construction procedures on concrete pavement surfaces  

E-Print Network [OSTI]

concrete on a dry subbase (even at 140'F) did not dverse?y affect the strength of the concrete slabs. 5. Of ti)s three types of finishes Employed, the burlap drag was found to provide the best sand?;last a'orasion resistan e. 6. ' Curing temperature... concrete on a dry subbase (even at 140'F) did not dverse?y affect the strength of the concrete slabs. 5. Of ti)s three types of finishes Employed, the burlap drag was found to provide the best sand?;last a'orasion resistan e. 6. ' Curing temperature...

Wrbas, Ronald Otto

2012-06-07T23:59:59.000Z

165

Covered Product Category: Compact Fluorescent Lamps  

Broader source: Energy.gov [DOE]

FEMP provides acquisition guidance across a variety of product categories, including compact fluorescent lamps (CFLs), which are an ENERGY STAR-qualified product category.

166

COMPACT HEAT EXCHANGERS FOR CONDENSATION APPLICATIONS: YESTERDAY...  

Office of Scientific and Technical Information (OSTI)

or allow other to do so, for U. S. Government purposes, i I ABSTRACT Compact heat exchangers are being increasinglyconsidered for condensationapplications in the...

167

Physics Guidelines for the Compact Ignition Tokamak  

Science Journals Connector (OSTI)

The Compact Ignition Tokamak Program / Proceedings of the Seveth Topical Meeting on the Technology of Fusion Energy (Reno, Nevada, June 15–19, 1986)

J. Sheffield; R. A. Dory; W. A. Houlberg; N. A. Uckan; M. Bell; P. Colestock; J. Hosea; S. Kaye; M. Petravic; D. Post; S. D. Scott; K. M. Young; K. H. Burrell; N. Ohyabu; R. Stambaugh; M. Greenwald; P. Liewer; D. Ross; C. Singer; H. Weitzner

168

Compact Potentiometric NOx Sensor | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Potentiometric NOx Sensor Compact Potentiometric NOx Sensor 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation...

169

Improving the wear resistance of the cylinder assembly in compact marine diesel engines  

Science Journals Connector (OSTI)

The performance of bushes in the 4Ch8.5/11 diesel engine is optimized on the basis of mathematical experiment design. Their wear resistance may be improved by finishing on the basis of special roller burnishin...

N. K. Sanaev

2014-05-01T23:59:59.000Z

170

CPI Concrete Plant International 2 | 2013 www.cpi-worldwide.com2 PRECAST CONCRETE ELEMENTS  

E-Print Network [OSTI]

of the insulating core. The grid passes through slits in the foam core, but does not create a thermal break due. With the insulation and CFRP grid in place, the inner wythe reinforcement is added above the rigid foam insulation with an inner and an outer wythe of concrete separated by a core of rigid foam insulation. Thermal efficiency

171

A compact molecular beam machine  

SciTech Connect (OSTI)

We have developed a compact, low cost, modular, crossed molecular beam machine. The new apparatus utilizes several technological advancements in molecular beams valves, ion detection, and vacuum pumping to reduce the size, cost, and complexity of a molecular beam apparatus. We apply these simplifications to construct a linear molecular beam machine as well as a crossed-atomic and molecular beam machine. The new apparatus measures almost 50 cm in length, with a total laboratory footprint less than 0.25 m{sup 2} for the crossed-atomic and molecular beam machine. We demonstrate the performance of the apparatus by measuring the rotational temperature of nitric oxide from three common molecular beam valves and by observing collisional energy transfer in nitric oxide from a collision with argon.

Jansen, Paul [Vrije Universiteit, 1081 HV Amsterdam (Netherlands); Chandler, David W.; Strecker, Kevin E. [Sandia National Laboratories, Livermore, California 94551 (United States)

2009-08-15T23:59:59.000Z

172

Compact Quantum Cascade Laser Transmitter  

SciTech Connect (OSTI)

): In this paper we present design considerations, thermal and optical modeling results, and device performance for a ruggedized, compact laser transmitter that utilizes a room temperature quantum cascade (QC) laser source. The QC laser transmitter is intended for portable mid-infrared (3-12 µm) spectroscopy applications, where the atmospheric transmission window is relatively free of water vapor interference and where the molecular rotational vibration absorption features can be used to detect and uniquely identify chemical compounds of interest. Initial QC laser-based sensor development efforts were constrained by the complications of cryogenic operation. However, improvements in both QC laser designs and fabrication processes have provided room-temperature devices that now enable significant miniaturization and integration potential for national security, environmental monitoring, atmospheric science, and industrial safety applications.

Anheier, Norman C.; Hatchell, Brian K.; Gervais, Kevin L.; Wojcik, Michael D.; Krishnaswami, Kannan; Bernacki, Bruce E.

2009-04-01T23:59:59.000Z

173

Plasma pressure compaction of nanodiamond  

Science Journals Connector (OSTI)

Detonation synthesized nanodiamond (ND) was sintered using a Plasma Pressure Compaction (P2C) technique. Sintering was performed for 1 min at temperatures between 700 and 1200 °C, and for 1–10 min at 900 °C under 65 MPa pressure. Structure and composition of the sintered samples were analyzed by X-ray diffraction, transmission electron microscopy and Raman microspectroscopy. The selected sintering conditions prevent excessive graphitization of diamond and allow formation of porous pellets having the density of 1.3–1.6 g/cm3, hardness > 0.1 GPa and Young's modulus > 3 GPa. The sintered ND pellets with porosity of about 50% have mechanical properties sufficient for handling and can be infiltrated to produce ND composites.

Sebastian Osswald; Adrian Gurga; Franklyn Kellogg; Kyu Cho; Gleb Yushin; Yury Gogotsi

2007-01-01T23:59:59.000Z

174

September 25, 2006 Experimental pressure solution compaction  

E-Print Network [OSTI]

September 25, 2006 Experimental pressure solution compaction of synthetic halite/calcite aggregates by addition of hard particles. Sieved mixtures of calcite and halite grains are experimentally compacted in drained pressure cells in the presence of a saturated aqueous solution. The individual halite grains

Paris-Sud XI, Université de

175

3D N = 4 Gauge Theory Compactication  

E-Print Network [OSTI]

Outline 3D N = 4 Gauge Theory Compactication Twistors 3D N = 4 Supersymmetric Gauge Theories and Hyperk¨ahler Metrics Richard Eager UCSB Friday, October 17th, 2008, 4:00 p.m. Richard Eager UCSB 3D N = 4 Supersymmetric Gauge Theories and Hyperk¨ahler M #12;Outline 3D N = 4 Gauge Theory Compactication Twistors

Bigelow, Stephen

176

The feasibility of modern technologies for reinforced concrete containment structures of nuclear power plants.  

E-Print Network [OSTI]

??This report explores the requirements for the design and analysis of concrete containment and shows how newer material technologies such as self-consolidating concrete (SCC) and… (more)

Czerniewski, Sarah

2009-01-01T23:59:59.000Z

177

E-Print Network 3.0 - architectural precast concrete Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Series of the PCI Foundation Innovative use of FRP for Precast Concrete Summary: -tee beams, insulated precast wall panels, architectural cladding, precast concrete filled FRP...

178

E-Print Network 3.0 - aggregate concrete beams Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

concrete beams Search Powered by Explorit Topic List Advanced Search Sample search results for: aggregate concrete beams Page: << < 1 2 3 4 5 > >> 1 Technical Report Documentation...

179

Structural performance of ASR/DEF damaged prestressed concrete trapezoidal box beams with dapped ends.  

E-Print Network [OSTI]

??Across the State of Texas and many other areas of the world, relatively young concrete structures have developed signs of premature concrete deterioration. Large cracks… (more)

Larson, Nancy Anne, 1986-

2010-01-01T23:59:59.000Z

180

Shear performance of ASR/DEF damaged prestressed concrete trapezoidal box bridge girders.  

E-Print Network [OSTI]

??Concrete bridges in Texas have developed large cracks in bent caps and pretensioned trapezoidal bridge girders. The bridges show premature concrete deterioration due to alkali-silica… (more)

Wang, Tz-Wei

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Assessment and strengthening of ASR and DEF affected concrete bridge columns.  

E-Print Network [OSTI]

??Alkali silica reaction (ASR) and delayed ettringite formation (DEF) are two causes of concrete deterioration. Both mechanisms cause expansion of concrete and thus extensive cracking.… (more)

Talley, Kimberly Grau

2009-01-01T23:59:59.000Z

182

Corrosion Repair and Corrosion Protection of Reinforced Concrete Structures in  

E-Print Network [OSTI]

11/14/2014 1 Corrosion Repair and Corrosion Protection of Reinforced Concrete Structures in Pulp and Paper Mills Vector Construction / Vector Corrosion Technologies www.vectorgroup.com www.vector-corrosion.com Presentation Outline · Introduction · Corrosion of Reinforced Concrete Structures · Protection of Chests

Das, Suman

183

Concrete vs. Abstract Problem Formats: A Disadvantage of Prior Knowledge  

E-Print Network [OSTI]

Concrete vs. Abstract Problem Formats: A Disadvantage of Prior Knowledge Andrew F. Heckler is identified for some questions. When a problem potentially elicits prior knowledge that is contrary to scientific knowledge, e.g. a scientific "misconception", it is found that the concrete representation invokes

Heckler, Andrew F.

184

Uncertainty propagation on damage evolution of a concrete structure subjected  

E-Print Network [OSTI]

the structure is subjected to. To investigate the influence of the material properties variability on the long-term for concrete materials 1. Introduction Deep nuclear waste disposal facilities need to be studied over periods rock in a deep underground storage. Calcium leaching leads to important changes in the concrete

Paris-Sud XI, Université de

185

Computational Modeling of Conventionally Reinforced Concrete Coupling Beams  

E-Print Network [OSTI]

COMPUTATIONAL MODELING OF CONVENTIONALLY REINFORCED CONCRETE COUPLING BEAMS A Thesis by AJAY SESHADRI SHASTRI Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of requirements... for the degree of MASTER OF SCIENCE December 2010 Major Subject: Civil Engineering Computational Modeling of Conventionally Reinforced Concrete Coupling Beams Copyright 2010...

Shastri, Ajay Seshadri

2012-02-14T23:59:59.000Z

186

DATA FOR THE CALCULATION OF ALBEDOS FROM CONCRETE  

E-Print Network [OSTI]

DATA FOR THE CALCULATION OF ALBEDOS FROM CONCRETE IRON, LEAD, AND WATER FOR PHOTONS AND NEUTRONS for the neutron albedo, and (3) the secondary-photon albedo for incident neutrons. Albedo data is provided for four materials: concrete, iron, lead, and water. Unlike previous compilations of albedo data, modern

Shultis, J. Kenneth

187

Radionuclide Retention in Concrete Wasteforms - FY13  

SciTech Connect (OSTI)

Assessing long-term performance of Category 3 waste cement grouts for radionuclide encasement requires knowledge of the radionuclide-cement interactions and mechanisms of retention (i.e., sorption or precipitation); the mechanism of contaminant release; the significance of contaminant release pathways; how wasteform performance is affected by the full range of environmental conditions within the disposal facility; the process of wasteform aging under conditions that are representative of processes occurring in response to changing environmental conditions within the disposal facility; the effect of wasteform aging on chemical, physical, and radiological properties; and the associated impact on contaminant release. This knowledge will enable accurate prediction of radionuclide fate when the wasteforms come in contact with groundwater. Data collected throughout the course of this work will be used to quantify the efficacy of concrete wasteforms, similar to those used in the disposal of low-level waste and mixed low-level waste, for the immobilization of key radionuclides (i.e., uranium, technetium, and iodine). Data collected will also be used to quantify the physical and chemical properties of the concrete affecting radionuclide retention.

Snyder, Michelle MV; Golovich, Elizabeth C.; Wellman, Dawn M.; Crum, Jarrod V.; Lapierre, Robert; Dage, Denomy C.; Parker, Kent E.; Cordova, Elsa A.

2013-10-15T23:59:59.000Z

188

Perforation of thin unreinforced concrete slabs  

SciTech Connect (OSTI)

This report discusses fourteen tests which were conducted to investigate the perforation of thin unreinforced concrete slabs. The 4340-steel projectile used in the test series is 50.8 mm in diameter, 355.6 mm in length, has a mass of 2.34 kg. and an ogive nose with caliber radius head of 3. The slabs, contained within steel culverts, are 1.52 m in diameter and consist of concrete with a nominal unconfined compressive strength of 38.2 MPa and maxima aggregate size of 9.5 mm. Slab thicknesses are 284.4, 254.0, 215.9 and 127.0 mm. Tests were conducted at impact velocities of about 313 m/s on all slab thicknesses and about 379 and 471 m/s on the 254.0-mm-thick slab. All tests were conducted at normal incidence to the slab. All tests were conducted at normal incidence to the slab. Information obtained from the tests used to determine the loading (deceleration) on the projectile during the perforation process, the velocity-displacement of the projectile as it perforated the slab, and the projectile position as damage occurred on the backface of the slab. The test projectile behaved essentially as a rigid body for all of the tests.

Cargile, J.D. [Army Engineer Waterways Experiment Station, Vicksburg, MS (United States); Giltrud, M.E. [Defense Nuclear Agency, Washington, DC (United States); Luk, V.K. [Sandia National Labs., Albuquerque, NM (United States)

1993-10-01T23:59:59.000Z

189

Compact X-Ray Light Source Workshop | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Compact X-Ray Light Source Workshop Compact X-Ray Light Source Workshop Teller R, Terminello L, Thevuthasan T, Moncton D. 2012. "Compact X-Ray Light Source Workshop Report."...

190

Compacting Plastic-Bonded Explosive Molding Powders to Dense Solids  

SciTech Connect (OSTI)

Dense solid high explosives are made by compacting plastic-bonded explosive molding powders with high pressures and temperatures for extended periods of time. The density is influenced by manufacturing processes of the powders, compaction temperature, the magnitude of compaction pressure, pressure duration, and number of repeated applications of pressure. The internal density variation of compacted explosives depends on method of compaction and the material being compacted.

B. Olinger

2005-04-15T23:59:59.000Z

191

Diamond Shaving of Contaminated Concrete Surfaces  

SciTech Connect (OSTI)

Decommissioning and decontamination of existing facilities presents technological challenges. One major challenge is the removal of surface contamination from concrete floors and walls while eliminating the spread of contamination and volumetric reduction of the waste stream. Numerous methods have been tried with a varying degree of success. Recent technology has made this goal achievable and has been used successfully. This new technology is the Diamond Floor Shaver and Diamond Wall shaver. The Diamond Floor Shaver is a self-propelled, walk behind machine that literally shaves the contaminated concrete surface to specified depths. This is accomplished by using a patented system of 100 dry cutting diamond blades with offset diamond segments that interlock to provide complete shaving of the concrete surface. Grooves are eliminated which allows for a direct frisk reading to analyze results. When attached to an appropriate size vacuum, the dust produced is 100% contained. Dust is collected in drums ready for disposition and disposal. The waste produced in shaving 7,500 square feet at 1/8 inch thickness would fill a single 55 gallon drum. Production is dependent on depth of shaving but averages 100 square feet per hour. The wall shaver uses the same patented diamond drum and blades but is hydraulically driven and is deployed using a robotic arm allowing its operation to be to totally remote. It can reach ceilings as high as 20 feet. Numerous small projects were successfully completed using this technology. Large scale deployment came in 2003. Bluegrass, in conjunction with Bartlett Services, deployed this technology to support decontamination activities for closing of the Rocky Flats nuclear weapons site. Up to six floor shavers and one wall shaver were deployed in buildings B371 and B374. These buildings had up to one half-inch, fixed plutonium and beryllium contamination. Hundred-thousands of square feet of floors and walls were shaved successfully to depths of up to one half inch. Decontamination efforts were so successful the balance of the buildings could be demolished using conventional methods. The shavers helped keep the project on schedule while the vacuum system eliminated the potential for contaminants becoming airborne.

Mullen, Lisa K. [Bluegrass Concrete Cutting Inc., 107 Mildred Street PO Box 427, Greenville, Alabama 36037 (United States)

2008-01-15T23:59:59.000Z

192

Micro- & Nano-Technologies Enabling More Compact, Lightweight...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Micro- & Nano-Technologies Enabling More Compact, Lightweight Thermoelectric Power Generation & Cooling Systems Micro- & Nano-Technologies Enabling More Compact, Lightweight...

193

Sulfate and acid resistant concrete and mortar  

DOE Patents [OSTI]

The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction and other applications, which hardenable mixtures demonstrate significant levels of acid and sulfate resistance while maintaining acceptable compressive strength properties. The acid and sulfate hardenable mixtures of the invention containing fly ash comprise cementitious materials and a fine aggregate. The cementitous materials may comprise fly ash as well as cement. The fine aggregate may comprise fly ash as well as sand. The total amount of fly ash in the hardenable mixture ranges from about 60% to about 120% of the total amount of cement, by weight, whether the fly ash is included as a cementious material, fine aggregate, or an additive, or any combination of the foregoing. In specific examples, mortar containing 50% fly ash and 50% cement in cementitious materials demonstrated superior properties of corrosion resistance. 6 figs.

Liskowitz, J.W.; Wecharatana, M.; Jaturapitakkul, C.; Cerkanowicz, A.E.

1998-06-30T23:59:59.000Z

194

Sulfate and acid resistant concrete and mortar  

DOE Patents [OSTI]

The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction and other applications, which hardenable mixtures demonstrate significant levels of acid and sulfate resistance while maintaining acceptable compressive strength properties. The acid and sulfate hardenable mixtures of the invention containing fly ash comprise cementitious materials and a fine aggregate. The cementitous materials may comprise fly ash as well as cement. The fine aggregate may comprise fly ash as well as sand. The total amount of fly ash in the hardenable mixture ranges from about 60% to about 120% of the total amount of cement, by weight, whether the fly ash is included as a cementious material, fine aggregate, or an additive, or any combination of the foregoing. In specific examples, mortar containing 50% fly ash and 50% cement in cementitious materials demonstrated superior properties of corrosion resistance.

Liskowitz, John W. (Belle Mead, NJ); Wecharatana, Methi (Parsippany, NJ); Jaturapitakkul, Chai (Bangkok, TH); Cerkanowicz, deceased, Anthony E. (late of Livingston, NJ)

1998-01-01T23:59:59.000Z

195

Concrete Industry Benefits from Ancient Romans and the ALS  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Concrete Industry Benefits from Concrete Industry Benefits from Ancient Romans and the ALS Concrete Industry Benefits from Ancient Romans and the ALS Print Thursday, 17 October 2013 14:24 Cement production - the mainstay of the modern concrete industry - is one of the primary sources of carbon dioxide emissions worldwide. Making cement essentially requires burning rock, an extremely energy-intensive process that releases a large amount of carbon into the atmosphere. In an effort to reduce its carbon footprint, the industry has begun to move toward new concrete "recipes" that incorporate environmentally friendly supplemental cementitious materials (SCMs), which partially replace Portland cement and reduce its use. The challenge is to maintain, or even increase, the end product's strength and durability while becoming more environmentally sustainable. Ancient Rome, without the impetus of modern environmental concerns, had a lot of this figured out. New insights into the Romans' ingenious concrete harbor structures now emerging from ALS beamline research could move the modern concrete industry toward its goal.

196

Concrete Industry Benefits from Ancient Romans and the ALS  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Concrete Industry Benefits from Concrete Industry Benefits from Ancient Romans and the ALS Concrete Industry Benefits from Ancient Romans and the ALS Print Thursday, 17 October 2013 14:24 Cement production - the mainstay of the modern concrete industry - is one of the primary sources of carbon dioxide emissions worldwide. Making cement essentially requires burning rock, an extremely energy-intensive process that releases a large amount of carbon into the atmosphere. In an effort to reduce its carbon footprint, the industry has begun to move toward new concrete "recipes" that incorporate environmentally friendly supplemental cementitious materials (SCMs), which partially replace Portland cement and reduce its use. The challenge is to maintain, or even increase, the end product's strength and durability while becoming more environmentally sustainable. Ancient Rome, without the impetus of modern environmental concerns, had a lot of this figured out. New insights into the Romans' ingenious concrete harbor structures now emerging from ALS beamline research could move the modern concrete industry toward its goal.

197

A CMOS-compatible compact display  

E-Print Network [OSTI]

Portable information devices demand displays with high resolution and high image quality that are increasingly compact and energy-efficient. Microdisplays consisting of a silicon CMOS backplane integrated with light ...

Chen, Andrew R. (Andrew Raymond)

2005-01-01T23:59:59.000Z

198

NONEXISTENCE OF ARITHMETIC FAKE COMPACT HERMITIAN ...  

E-Print Network [OSTI]

? of G is a fake compact hermitian symmetric space, or a fake Xu, if its Betti ...... Letting A = (2?)16/4320 and using the bounds (13) and (22), we conclude that.

2011-06-17T23:59:59.000Z

199

Steady state compact toroidal plasma production  

DOE Patents [OSTI]

Apparatus and method for maintaining steady state compact toroidal plasmas. A compact toroidal plasma is formed by a magnetized coaxial plasma gun and held in close proximity to the gun electrodes by applied magnetic fields or magnetic fields produced by image currents in conducting walls. Voltage supply means maintains a constant potential across the electrodes producing an increasing magnetic helicity which drives the plasma away from a minimum energy state. The plasma globally relaxes to a new minimum energy state, conserving helicity according to Taylor's relaxation hypothesis, and injecting net helicity into the core of the compact toroidal plasma. Controlling the voltage so as to inject net helicity at a predetermined rate based on dissipative processes maintains or increases the compact toroidal plasma in a time averaged steady state mode.

Turner, William C. (Livermore, CA)

1986-01-01T23:59:59.000Z

200

Stuck-at-fault test set compaction  

E-Print Network [OSTI]

and introduces a new method for measuring the contribution of each test pattern. Both static and dynamic compaction methods were implemented and evaluated in terms of final test pattern set size and diversity of excitation. The program resulting from...

Vanfickell, Jason Michael

2013-02-22T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Combining Global Code and Data Compaction  

Science Journals Connector (OSTI)

Computers are increasingly being incorporated in devices with a limited amount of available memory. As a result research is increasingly focusing on the automated reduction of program size. Existing literature focuses on either data or code compaction ...

Bjorn De Sutter; Bruno De Bus; Koen De Bosschere; Saumya Debray

2001-08-01T23:59:59.000Z

202

Dual-phase ferritic martensitic steel for concrete reinforcement  

SciTech Connect (OSTI)

This paper will discuss the microstructural characteristics and the mechanical and corrosion properties of dual-phase ferritic martensitic (DFM) steel embedded in concrete. Previous research on DFM steel has shown that these steels can attain higher tensile strengths, higher energy absorption, more fatigue resistance, higher ductility, and superior corrosion resistance than conventional reinforcement. Currently, a research project investigating the mechanical and durability aspects of DFM bars embedded in small concrete samples is underway. The objective of this research is to determine mechanical characteristics and present preliminary findings on possible corrosion mechanisms of a 0.1C/2Si DFM steel embedded in concrete.

Trejo, D.; Monteiro, P.; Thomas, G. [Univ. of California, Berkeley, CA (United States)

1995-12-31T23:59:59.000Z

203

Concrete international /january 2010 35 Portland limestone cement (PLC) is produced by  

E-Print Network [OSTI]

Concrete international /january 2010 35 Portland limestone cement (PLC) is produced by blending demonstration of PLC concrete in the late-fall construction of a parking lot at a ready mixed concrete plant near Gatineau, QC, Canada. The performance of the plastic and hardened concretes produced with PLC

204

Reservoir compaction loads on casings and liners  

SciTech Connect (OSTI)

Pressure drawdown due to production from a reservoir causes compaction of the reservoir formation which induces axial and radial loads on the wellbore. Reservoir compaction loads increase during the production life of a well, and are greater for deviated wells. Presented here are casing and liner loads at initial and final pressure drawdowns for a particular reservoir and at well deviation angles of 0 to 45 degrees.

Wooley, G.R.; Prachner, W.

1984-09-01T23:59:59.000Z

205

Compact reflective imaging spectrometer utilizing immersed gratings  

DOE Patents [OSTI]

A compact imaging spectrometer comprising an entrance slit for directing light, a first mirror that receives said light and reflects said light, an immersive diffraction grating that diffracts said light, a second mirror that focuses said light, and a detector array that receives said focused light. The compact imaging spectrometer can be utilized for remote sensing imaging spectrometers where size and weight are of primary importance.

Chrisp, Michael P. (Danville, CA)

2006-05-09T23:59:59.000Z

206

The relative economy of prestressed concrete bridge designs and handbook data for a number of prestressed concrete beam designs  

E-Print Network [OSTI]

, 000 psi), or by using a concrete with a hd. ghsr modulus of elasticity, or by oontrolling the shrinks. ~ in the concretes or by overstretching the steel, or any oombination of these, Since this is possible~ the co. vputations will bs co. cpletcd... since the stress produced bv Fc fell vithin the presoribsd limitse 25 Principal Tensile dtressesc Ths ALHO specifications allow no dis tribution of wheel loads when computing shear stresses for concrete or steel girder brig. ~s but on the other hand...

Jones, Truman Ross

1955-01-01T23:59:59.000Z

207

Natural fiber reinforced aerated concrete : an experimental investigation  

E-Print Network [OSTI]

The purpose of this study is to compare existing research with aerated concrete and fiber reinforcement to original experiments completed investigating the benefits of adding natural fiber tensile reinforcement to aerated ...

Garbis, Leonidia Maria

2013-01-01T23:59:59.000Z

208

Design of wind turbines with Ultra-High Performance Concrete  

E-Print Network [OSTI]

Ultra-High Performance Concrete (UHPC) has proven an asset for bridge design as it significantly reduces costs. However, UHPC has not been applied yet to wind turbine technology. Design codes do not propose any recommendations ...

Jammes, François-Xavier

2009-01-01T23:59:59.000Z

209

Seismic Fragility Analysis and Loss Estimation for Concrete Structures  

E-Print Network [OSTI]

The main objective of this study is to develop a methodology to assess seismic vulnerability of concrete structures and to estimate direct losses related to structural damage due to future seismic events. This dissertation contains several...

Bai, Jong Wha

2012-02-14T23:59:59.000Z

210

Water retention and gas relative permeability of two industrial concretes  

SciTech Connect (OSTI)

This experimental study aims at identifying the water retention properties of two industrial concretes to be used for long term underground nuclear waste storage structures. Together with water retention, gas transfer properties are identified at varying water saturation level, i.e. relative gas permeability is assessed directly as a function of water saturation level S{sub w}. The influence of the initial de-sorption path and of the subsequent re-saturation are analysed both in terms of water retention and gas transfer properties. Also, the influence of concrete microstructure upon water retention and relative gas permeability is assessed, using porosity measurements, analysis of the BET theory from water retention properties, and MIP. Finally, a single relative gas permeability curve is proposed for each concrete, based on Van Genuchten-Mualem's statistical model, to be used for continuous modelling approaches of concrete structures, both during drying and imbibition.

Chen Wei; Liu Jian; Brue, Flore; Skoczylas, Frederic [Univ Lille Nord de France, F-59000 Lille (France); ECLille, LML, BP 48, F-59650 Villeneuve d'Ascq (France); CNRS, UMR 8107, F-59650 Villeneuve d'Ascq (France); Davy, C.A., E-mail: catherine.davy@ec-lille.fr [Univ Lille Nord de France, F-59000 Lille (France); ECLille, LML, BP 48, F-59650 Villeneuve d'Ascq (France); CNRS, UMR 8107, F-59650 Villeneuve d'Ascq (France); Bourbon, Xavier; Talandier, Jean [Andra, 1-7 rue Jean Monnet, F-92298 Chatenay-Malabry Cedex (France)

2012-07-15T23:59:59.000Z

211

Transcending Portland Cement with 100 percent fly ash concrete  

SciTech Connect (OSTI)

The use of concrete, made with 100% fly ash and no Portland cement, in buildings at the Transportation Institute in Bozeman, MT, USA, is described. 3 refs., 7 figs.

Cross, D.; Akin, M.; Stephens, J.; Cuelh, E. [Montana State University, MT (United States)

2009-07-01T23:59:59.000Z

212

Geopolymer concretes: a green construction technology rising from the ash  

SciTech Connect (OSTI)

Researchers at Louisiana Tech University have embarked on a multi-year research initiative to develop applications for inorganic polymer concrete, or geopolymer concrete, in the area of civil construction, and to bring solve of these applications to market. One objective was to produce a spray-on coating for use in the harsh environment of wastewater conveyance and treatment facilities. Another project is to establish relationships between fly ash composition and particle size distribution and the mechanical attributes and workability of the resulting geopolymer concrete. A third project is to develop a 'smart' geopolymer concrete whose response to a given electric current can be correlated to the stress level to which the structure is subjected. 1 fig., 6 photos.

Allouche, E. [Louisiana Tech University, LA (United States)

2009-07-01T23:59:59.000Z

213

Bitumen-rubber composite binders for production of asphalt concretes  

Science Journals Connector (OSTI)

The dissolution of vulcanized rubber in bitumen in the presence of a devulcanizing additive and the formation of bitumen-rubber composites, which are promising binders for the production of asphalt concretes, wer...

R. G. Zhitov; V. N. Kizhnyaev; V. V. Alekseenko…

2011-11-01T23:59:59.000Z

214

Technological rules and constraints affecting design of precast concrete housing  

E-Print Network [OSTI]

Precast concrete technology is of great importance in multifamily housing. This technology provides the possibility to the industrialize housing construction and thus enhance the availability and quality of houses. With ...

Nakamura, Takashi

1994-01-01T23:59:59.000Z

215

Seismic performance of polymer modified concretes in flexure-modelling  

Science Journals Connector (OSTI)

Considerable research has been carried out in the recent years in the development of models to simulate the inelastic responses of reinforced concrete elements. The enhancement of ductility and the post-peak behaviour are of special interest for the seismic design of structures. Polymer modified fibre concretes are found to be ideal for seismic application with its inherent structural characteristics. An experimental investigation has been undertaken to understand the flexural behaviour of the polymer-modified fibre concrete modified with natural rubber latex. The results are compared with the response of normal strength concrete beam. Analytical modelling of the beams were carried out in a user friendly finite element software to accurately predict the monotonic behaviour of the beams which is considered to be the envelope of cyclic curve. The strains developed were found and are compared with the theoretical results.

R. Sreekala; K. Muthumani; N. Gopalakrishnan; K. Sathish Kumar; G.V. Rama Rao; Nagesh R. Iyer

2012-01-01T23:59:59.000Z

216

Dynamic analysis of concrete coupled wall structures : a parametric study  

E-Print Network [OSTI]

Concrete coupled wall structure is a system that can efficiently dissipate energy under the effect of lateral loads. It has been widely used in medium height buildings for several decades. While researchers have conducted ...

Huang, Elaine Annabelle, 1981-

2005-01-01T23:59:59.000Z

217

Concrete lining for steel ladle of the infusion (teapot) type  

Science Journals Connector (OSTI)

As a result of replacing firebrick and chrome -magnesite brick by concrete of magnesite-chromite composition, the service life of the lining was increased with a simultaneous reduction of the labor force for t...

P. N. D'yachkov; G. G. Zagainov; O. N. Zaikov; B. T. Fishel'

218

Nano-Macro Correlation of Nano-Silica Concrete  

Science Journals Connector (OSTI)

Concrete mixes using progressively finer size nano-silica particles (7–150nm) were prepared to study the effect of nano-size pozzolans (nano-silica). Conventional compression tests demonstrated progressively high...

Joan Schoepfer; Arup Maji

2013-01-01T23:59:59.000Z

219

STRESS WAVE EMISSION AND FRACTURE OF PRESTRESSED CONCRETE REACTOR...  

Office of Scientific and Technical Information (OSTI)

PRESTRESSED CONCRETE REACTOR VESSEL MATERIALS. Re-direct Destination: Temp Data Fields Green, A.T. Temp Data Storage 3: Aerojet-General Corp., Sacramento, Calif. Short URL for...

220

Designing concrete mixtures for strength, elastic modulus and fracture energy  

Science Journals Connector (OSTI)

There are many methods for determining a concrete mix proportion when the compressive strength is the ... when other criteria, such as the fracture energy or the elastic modulus, are specified. For these cases, a...

P. J. M. Monteiro; P. R. L. Helene; S. H. Kang

1993-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Recycling asphaltic concrete with sulphur as a supplemental binder  

E-Print Network [OSTI]

RECYCLING ASPHALTIC CONCRETE WITH SULPHUR AS A SUPPLEMENTAL BINDER A Thesis by ROBERT WILLIAM BARNETT Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE... August 1976 Major Subject: Civil Engineering RECYCLING ASPHALTIC CONCRETE WITH SULPHUR AS A SUPPLEMENTAL BINDER A Thesis by ROBERT WILLIAM BARNETT Approved as to style and content by: :) (Chairm o I ommit tee) (M ber) Mem er) August 1976...

Barnett, Robert William

1976-01-01T23:59:59.000Z

222

The Troll oil floater: The first concrete floater platform  

SciTech Connect (OSTI)

The Troll Olje platform is the first catenary-moored concrete floater ever built. Detail engineering commenced in November 1992, and the substructure should be ready mechanical complete by December 1994. The main challenge has been to develop, design and fabricate a new concept within a tight schedule. This paper describes the main features of the concrete floater and gives an overview of some of the experience gained during the development of the concept.

Helland, K.; Jensen, B.; Martin, J.; Meaas, P.

1994-12-31T23:59:59.000Z

223

Concrete characterization for the 300 Area Solvent Evaporator Closure Site  

SciTech Connect (OSTI)

This report summarizes the sampling activities undertaken and the analytical results obtained in a concrete sampling and analyses study performed for the 300 Area Solvent Evaporator (300 ASE) closure site. The 300 ASE is identified as a Resource Conservation and Recovery Act (RCRA) treatment, storage, or disposal (TSD) unit that will be closed in accordance with the applicable laws and regulations. No constituents of concern were found in concentrations indicating contamination of the concrete by 300 ASE operations.

Prignano, A.L.

1995-02-21T23:59:59.000Z

224

Strategy Guideline: Compact Air Distribution Systems  

SciTech Connect (OSTI)

This Strategy Guideline discusses the benefits and challenges of using a compact air distribution system to handle the reduced loads and reduced air volume needed to condition the space within an energy efficient home. Traditional systems sized by 'rule of thumb' (i.e., 1 ton of cooling per 400 ft2 of floor space) that 'wash' the exterior walls with conditioned air from floor registers cannot provide appropriate air mixing and moisture removal in low-load homes. A compact air distribution system locates the HVAC equipment centrally with shorter ducts run to interior walls, and ceiling supply outlets throw the air toward the exterior walls along the ceiling plane; alternatively, high sidewall supply outlets throw the air toward the exterior walls. Potential drawbacks include resistance from installing contractors or code officials who are unfamiliar with compact air distribution systems, as well as a lack of availability of low-cost high sidewall or ceiling supply outlets to meet the low air volumes with good throw characteristics. The decision criteria for a compact air distribution system must be determined early in the whole-house design process, considering both supply and return air design. However, careful installation of a compact air distribution system can result in lower material costs from smaller equipment, shorter duct runs, and fewer outlets; increased installation efficiencies, including ease of fitting the system into conditioned space; lower loads on a better balanced HVAC system, and overall improved energy efficiency of the home.

Burdick, A.

2013-06-01T23:59:59.000Z

225

Compaction and Sintering of Mo Powders  

SciTech Connect (OSTI)

To support the development of Mo-99 production by NorthStar Medical Technologies, LLC, Mo metal powders were evaluated for compaction and sintering characteristics as they relate to Mo-100 accelerator target disk fabrication. Powders having a natural isotope distribution and enriched Mo-100 powder were examined. Various powder characteristics are shown to have an effect on both the compaction and sintering behavior. Natural Mo powders could be cold pressed directly to >90% density. All of the powders, including the Mo-100 samples, could be sintered after cold pressing to >90% density. As an example, a compacted Mo-100 disk reached 89.7% density (9.52 g/cm3) after sintering at 1000 C for 1 hr. in flowing Ar/4%H2. Higher sintering temperatures were required for other powder samples. The relationships between processing conditions and the resulting densities of consolidated Mo disks will be presented.

Nunn, Stephen D [ORNL] [ORNL; Kiggans, Jim [ORNL] [ORNL; Bryan, Chris [ORNL] [ORNL

2013-01-01T23:59:59.000Z

226

Settlement of footing on compacted ash bed  

SciTech Connect (OSTI)

Compacted coal ash fills exhibit capillary stress due to contact moisture and preconsolidation stress due to the compaction process. As such, the conventional methods of estimating settlement of footing on cohesionless soils based on penetration tests become inapplicable in the case of footings on coal ash fills, although coal ash is also a cohesionless material. Therefore, a method of estimating load-settlement behavior of footings resting on coal ash fills accounting for the effect of capillary and preconsolidation stresses is presented here. The proposed method has been validated by conducting plate load tests on laboratory prepared compacted ash beds and comparing the observed and predicted load-settlement behavior. Overestimation of settlement greater than 100% occurs when capillary and preconsolidation stresses are not accounted for, as is the case in conventional methods.

Ramasamy, G.; Pusadkar, S.S. [IIT Roorkee, Roorkee (India). Dept. of Civil Engineering

2007-11-15T23:59:59.000Z

227

Compact Power Inc CPI | Open Energy Information  

Open Energy Info (EERE)

Compact Power Inc CPI Compact Power Inc CPI Jump to: navigation, search Name Compact Power Inc (CPI) Place Troy, Michigan Zip 48083 Sector Vehicles Product Producer of lithium-ion batteries for Hybrid Electric Vehicles (HEV) and non-automotive (commercial and military) markets. Coordinates 39.066587°, -80.768578° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.066587,"lon":-80.768578,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

228

Remote vacuum compaction of compressible hazardous waste  

DOE Patents [OSTI]

A system for remote vacuum compaction and containment of low-level radioactive or hazardous waste comprising a vacuum source, a sealable first flexible container, and a sealable outer flexible container for receiving one or more first flexible containers. A method for compacting low level radioactive or hazardous waste materials at the point of generation comprising the steps of sealing the waste in a first flexible container, sealing one or more first containers within an outer flexible container, breaching the integrity of the first containers, evacuating the air from the inner and outer containers, and sealing the outer container shut.

Coyne, Martin J. (Pittsburgh, PA); Fiscus, Gregory M. (McMurray, PA); Sammel, Alfred G. (Pittsburgh, PA)

1998-01-01T23:59:59.000Z

229

Momentum compaction and phase slip factor  

SciTech Connect (OSTI)

Section 2.3.11 of the Handbook of Accelerator Physics and Engineering on Landau damping is updated. The slip factor and its higher orders are given in terms of the various orders of the momentum compaction. With the aid of a simplified FODO lattice, formulas are given for the alteration of the lower orders of the momentum compaction by various higher multipole magnets. The transition to isochronicity is next demonstrated. Formulas are given for the extraction of the first three orders of the slip factor from the measurement of the synchrotron tune while changing the rf frequency. Finally bunch-length compression experiments in semi-isochronous rings are reported.

Ng, K.Y.; /Fermilab

2010-10-01T23:59:59.000Z

230

Remote vacuum compaction of compressible hazardous waste  

DOE Patents [OSTI]

A system is described for remote vacuum compaction and containment of low-level radioactive or hazardous waste comprising a vacuum source, a sealable first flexible container, and a sealable outer flexible container for receiving one or more first flexible containers. A method for compacting low level radioactive or hazardous waste materials at the point of generation comprising the steps of sealing the waste in a first flexible container, sealing one or more first containers within an outer flexible container, breaching the integrity of the first containers, evacuating the air from the inner and outer containers, and sealing the outer container shut. 8 figs.

Coyne, M.J.; Fiscus, G.M.; Sammel, A.G.

1998-10-06T23:59:59.000Z

231

Radionuclide Migration through Sediment and Concrete: 16 Years of Investigations  

SciTech Connect (OSTI)

The Waste Management Project provides safe, compliant, and cost-effective waste management services for the Hanford Site and the U.S. Department of Energy (DOE) complex. Part of these services includes safe disposal of low-level waste and mixed low-level waste at the Hanford Low-Level Waste Burial Grounds in accordance with the requirements of DOE Order 435.1, Radioactive Waste Management. To partially satisfy these requirements, performance assessment analyses were completed and approved. DOE Order 435.1 also requires continuing data collection to increase confidence in the critical assumptions used in these analyses to characterize the operational features of the disposal facility that are relied on to satisfy the performance objectives identified in the order. Cement-based solidification and stabilization is considered for hazardous waste disposal because it is easily done and cost-efficient. One critical assumption is that concrete will be used as a waste form or container material at the Hanford Site to control and minimize the release of radionuclide constituents in waste into the surrounding environment. Concrete encasement would contain and isolate the waste packages from the hydrologic environment and act as an intrusion barrier. Any failure of concrete encasement may result in water intrusion and consequent mobilization of radionuclides from the waste packages. The radionuclides iodine-129, selenium-75, technetium-99, and uranium-238 have been identified as long-term dose contributors (Mann et al. 2001; Wood et al. 1995). Because of their anionic nature in aqueous solutions, these constituents of potential concern may be released from the encased concrete by mass flow and/or diffusion and migrate into the surrounding subsurface environment (Serne et al. 1989; 1992; 1993a, b; 1995). Therefore, it is necessary to assess the performance of the concrete encasement structure and the ability of the surrounding soil to retard radionuclide migration. Each of the test methods performed throughout the lifetime of the project has focused on different aspects of the concrete waste form weathering process. Diffusion of different analytes [technetium-99 (Tc-99), iodine-125 (I-125), stable iodine (I), uranium (U), and rhenium (Re)] has been quantified from experiments under both saturated and unsaturated conditions. The water-saturated conditions provide a conservative estimate of the concrete’s performance in situ, and the unsaturated conditions provide a more accurate estimate of the diffusion of contaminants from the concrete.

Golovich, Elizabeth C.; Mattigod, Shas V.; Snyder, Michelle MV; Powers, Laura; Whyatt, Greg A.; Wellman, Dawn M.

2014-11-06T23:59:59.000Z

232

FODO-Supercell Based Compact Ring Design with Tunable Momentum Compaction and Optimized Dynamic Aperture  

SciTech Connect (OSTI)

A storage ring with tunable momentum compaction has the advantage in achieving different RMS bunch length with similar RF capacity, which is potentially useful for many applications, such as linear collider damping ring and pre-damping ring where injected beam has a large energy spread and a large transverse emittance. A tunable bunch length also makes the commissioning and fine tuning easier in manipulating the single bunch instabilities. In this paper, a compact ring design based on a supercell is presented, which achieves a tunable momentum compaction while maintaining a large dynamic aperture.

Sun, Yipeng; /SLAC

2012-05-11T23:59:59.000Z

233

Interstate Mining Compact Commission (multi-state) | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

You are here You are here Home » Interstate Mining Compact Commission (multi-state) Interstate Mining Compact Commission (multi-state) < Back Eligibility Commercial Construction Developer Industrial Investor-Owned Utility Local Government Municipal/Public Utility Rural Electric Cooperative Systems Integrator Tribal Government Utility Program Info Start Date 1970 State Alabama Program Type Safety and Operational Guidelines Siting and Permitting Provider Interstate Mining Compact Commission The Interstate Mining Compact is a multi-state governmental agency / organization that represents the natural resource and related environmental protection interests of its member states. Currently, 23 states are members to the compact, and 6 additional states are associate members. The compact

234

A Global Compact to End Poverty  

E-Print Network [OSTI]

A Global Compact to End Poverty Jeffrey Sachs on stabilisation, transition and weapons of mass, and Professor of Health Policy and Management at Columbia University. He is also Director of the UN Millennium Policy and Management. Currently he is a Special Advisor on the Millennium Development Goals to United

235

Physics of compact stellarators* S. P. Hirshman,  

E-Print Network [OSTI]

Physics of compact stellarators* S. P. Hirshman, D. A. Spong, J. C. Whitson, B. Nelson, D. B. Redi, W. Reiersen, A. H. Reiman, J. Schmidt, R. White, and M. C. Zarnstorff Princeton Plasma Physics, Austin, Texas 78712-1081 A. Boozer Department of Applied Physics, Columbia University, New York, New York

236

Compact range for variable-zone measurements  

DOE Patents [OSTI]

A compact range for testing antennas or radar targets includes a source for directing energy along a feedline toward a parabolic reflector. The reflected wave is a spherical wave with a radius dependent on the distance of the source from the focal point of the reflector.

Burnside, Walter D. (Columbus, OH); Rudduck, Roger C. (Columbus, OH); Yu, Jiunn S. (Albuquerque, NM)

1988-01-01T23:59:59.000Z

237

Refueling Tokamaks by Injection of Compact Toroids  

Science Journals Connector (OSTI)

It is shown that transverse injection of a hypervelocity high-density spheromak plasmoid into a tokamak plasma may be a viable fueling scheme. Three important processes occur and are discussed individually: establishment of equilibrium, slowing down, and disassembly of the compact toroid.

P. B. Parks

1988-09-19T23:59:59.000Z

238

Compact range for variable-zone measurements  

DOE Patents [OSTI]

A compact range for testing antennas or radar targets includes a source for directing energy along a feedline toward a parabolic reflector. The reflected wave is a spherical wave with a radius dependent on the distance of the source from the focal point of the reflector. 2 figs.

Burnside, W.D.; Rudduck, R.C.; Yu, J.S.

1987-02-27T23:59:59.000Z

239

Design of Earthquake Resistant Bridges Using Rocking Columns  

E-Print Network [OSTI]

Self-Compacting Concrete being2.2.2 Self-Compacting Concrete . . . . . 2.3 Bridge ColumnsBRIDGE CONSTRUCTION Self-Compacting Concrete The mechanical

Barthes, Clement Benjamin

2012-01-01T23:59:59.000Z

240

Limit Operators, Collective Compactness, and the Spectral Theory of Infinite Matrices  

E-Print Network [OSTI]

In the first half of this text we explore the interrelationships between the abstract theory of limit operators (see e.g. the recent monographs of Rabinovich, Roch & Silbermann and Lindner) and the concepts and results of the generalised collectively compact operator theory introduced by Chandler-Wilde and Zhang. We build up to results obtained by applying this generalised collectively compact operator theory to the set of limit operators of an operator $A$. In the second half of this text we study bounded linear operators on the generalised sequence space $\\ell^p(\\Z^N,U)$, where $p\\in [1,\\infty]$ and $U$ is some complex Banach space. We make what seems to be a more complete study than hitherto of the connections between Fredholmness, invertibility, invertibility at infinity, and invertibility or injectivity of the set of limit operators, with some emphasis on the case when the operator $A$ is a locally compact perturbation of the identity. Especially, we obtain stronger results than previously known for the subtle limiting cases of $p=1$ and $\\infty$. Our tools in this study are the results from the first half of the text and an exploitation of the partial duality between $\\ell^1$ and $\\ell^\\infty$. Results in this second half of the text include a new proof that injectivity of all limit operators (the classic Favard condition) implies invertibility for a general class of almost periodic operators, and characterisations of invertibility at infinity and Fredholmness for operators in the so-called Wiener algebra. In two final chapters our results are illustrated by and applied to concrete examples. Firstly, we study the spectra and essential spectra of discrete Schr\\"odinger operators (both self-adjoint and non-self-adjoint), including operators with almost periodic and random potentials. In the final chapter we apply our results to integral operators on $\\R^N$.

Simon N. Chandler-Wilde; Marko Lindner

2010-05-05T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Engineering properties of miniature cement - fly ash compacts prepared by high pressure compaction  

E-Print Network [OSTI]

ENGINEERING PROPERTIES OF MINIATURE CEMENT - FLY ASH COMPACTS PREPARED BY HIGH PRESSURE COMPACTION E NGIRPR OT SFMMAFU AEU C-ALEYY HDOBPvvIi va vGI ge(iD(vI oannItI au NId(R E)L xrP1IeRPvT 9(evP(n uDnuPnnBIrv au vGI eI0DPeIBIrvR uae vGI i...IteII au LEHNFA -M Ho2FYoF EDtDRv 3456 L(7ae HDO7I8v? oP1Pn FrtPrIIePrt ENGINEERING PROPERTIES OF MINIATURE CEMENT - FLY ASH COMPACTS PREPARED BY HIGH PRESSURE COMPACTION E NGIRPR OT SFMMAFU AEU C-ALEYY E99ea1Ii (R va RvTnI (ri 8arvIrv OT? LP...

Bormann, Jeffrey Ray

1985-01-01T23:59:59.000Z

242

Nondestructive Evaluation of Concrete Structures at BAM | ornl.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Nondestructive Evaluation of Concrete Structures at BAM Nondestructive Evaluation of Concrete Structures at BAM Jan 17 2014 10:00 AM - 11:00 AM Dr. Herbert Wiggenhauser, Federal Institute for Materials Research and Testing (BAM), Berlin, Germany EESRD Seminar Weinberg Auditorium CONTACT : Email: Dwight Clayton Phone:865.576.8134 Add to Calendar SHARE NDT of concrete structures at BAM (Federal Institute for Materials Research and Testing) in Berlin/Germany is focussed on the evaluation of structural properties in RC structures: Location of reinforcement, position of tendon ducts, condition of grouting in tendons, presence and location of honeycombs, sizing of cracks and others. These testing tasks are mainly solved using GPR (ground penetrating radar) and low frequency ultrasound pulse echo. Scanning and automation supports the evaluations and

243

Treatment of fly ash for use in concrete  

DOE Patents [OSTI]

A process for treating fly ash to render it highly usable as a concrete additive. A quantity of fly ash is obtained that contains carbon and which is considered unusable fly ash for concrete based upon foam index testing. The fly ash is mixed with an activator solution sufficient to initiate a geopolymerization reaction and for a geopolymerized fly ash. The geopolymerized fly ash is granulated. The geopolymerized fly ash is considered usable fly ash for concrete according to foam index testing. The geopolymerized fly ash may have a foam index less than 35% of the foam index of the untreated fly ash, and in some cases less than 10% of the foam index of the untreated fly ash. The activator solution may contain an alkali metal hydroxide, carbonate, silicate, aluminate, or mixtures thereof.

Boxley, Chett (Park City, UT); Akash, Akash (Salt lake City, UT); Zhao, Qiang (Natick, MA)

2012-05-08T23:59:59.000Z

244

Treatment of fly ash for use in concrete  

DOE Patents [OSTI]

A process for treating fly ash to render it highly usable as a concrete additive. A quantity of fly ash is obtained that contains carbon and which is considered unusable fly ash for concrete based upon foam index testing. The fly ash is mixed with a quantity of spray dryer ash (SDA) and water to initiate a geopolymerization reaction and form a geopolymerized fly ash. The geopolymerized fly ash is granulated. The geopolymerized fly ash is considered usable fly ash for concrete according to foam index testing. The geopolymerized fly ash may have a foam index less than 40%, and in some cases less than 20%, of the foam index of the untreated fly ash. An optional alkaline activator may be mixed with the fly ash and SDA to facilitate the geopolymerization reaction. The alkaline activator may contain an alkali metal hydroxide, carbonate, silicate, aluminate, or mixtures thereof.

Boxley, Chett (Park City, UT)

2012-05-15T23:59:59.000Z

245

Treatment of fly ash for use in concrete  

DOE Patents [OSTI]

A process for treating fly ash to render it highly usable as a concrete additive. A quantity of fly ash is obtained that contains carbon and which is considered unusable fly ash for concrete based upon foam index testing. The fly ash is mixed with an activator solution sufficient to initiate a geopolymerization reaction and for a geopolymerized fly ash. The geopolymerized fly ash is granulated. The geopolymerized fly ash is considered usable fly ash for concrete according to foam index testing. The geopolymerized fly ash may have a foam index less than 35% of the foam index of the untreated fly ash, and in some cases less than 10% of the foam index of the untreated fly ash. The activator solution may contain an alkali metal hydroxide, carbonate, silicate, aluminate, or mixtures thereof.

Boxley, Chett; Akash, Akash; Zhao, Qiang

2013-01-08T23:59:59.000Z

246

Concrete Cleaning, Inc. centrifugal shot blaster: Baseline report; Summary  

SciTech Connect (OSTI)

The centrifugal shot blaster is an electronically operated shot-blast machine that removes layer of concrete of varying depths. Hardened steel shot propelled at a high rate of speed abrades the surface of the concrete. The depth of material removed is determined by the rate of speed the machine is traveling and the volume of shot being fired into the blast chamber. The steel shot is reused until it is pulverized to dust, which is deposited in the waste container with the concrete being removed. Debris is continually vacuumed by a large dust collection system attached to the shot blaster. The safety and health evaluation during the human factors assessment focused on two main areas: noise and dust.

NONE

1997-07-31T23:59:59.000Z

247

Survey of four damage models for concrete.  

SciTech Connect (OSTI)

Four conventional damage plasticity models for concrete, the Karagozian and Case model (K&C), the Riedel-Hiermaier-Thoma model (RHT), the Brannon-Fossum model (BF1), and the Continuous Surface Cap Model (CSCM) are compared. The K&C and RHT models have been used in commercial finite element programs many years, whereas the BF1 and CSCM models are relatively new. All four models are essentially isotropic plasticity models for which 'plasticity' is regarded as any form of inelasticity. All of the models support nonlinear elasticity, but with different formulations. All four models employ three shear strength surfaces. The 'yield surface' bounds an evolving set of elastically obtainable stress states. The 'limit surface' bounds stress states that can be reached by any means (elastic or plastic). To model softening, it is recognized that some stress states might be reached once, but, because of irreversible damage, might not be achievable again. In other words, softening is the process of collapse of the limit surface, ultimately down to a final 'residual surface' for fully failed material. The four models being compared differ in their softening evolution equations, as well as in their equations used to degrade the elastic stiffness. For all four models, the strength surfaces are cast in stress space. For all four models, it is recognized that scale effects are important for softening, but the models differ significantly in their approaches. The K&C documentation, for example, mentions that a particular material parameter affecting the damage evolution rate must be set by the user according to the mesh size to preserve energy to failure. Similarly, the BF1 model presumes that all material parameters are set to values appropriate to the scale of the element, and automated assignment of scale-appropriate values is available only through an enhanced implementation of BF1 (called BFS) that regards scale effects to be coupled to statistical variability of material properties. The RHT model appears to similarly support optional uncertainty and automated settings for scale-dependent material parameters. The K&C, RHT, and CSCM models support rate dependence by allowing the strength to be a function of strain rate, whereas the BF1 model uses Duvaut-Lion viscoplasticity theory to give a smoother prediction of transient effects. During softening, all four models require a certain amount of strain to develop before allowing significant damage accumulation. For the K&C, RHT, and CSCM models, the strain-to-failure is tied to fracture energy release, whereas a similar effect is achieved indirectly in the BF1 model by a time-based criterion that is tied to crack propagation speed.

Leelavanichkul, Seubpong (University of Utah, Salt Lake City, UT); Brannon, Rebecca Moss (University of Utah, Salt Lake City, UT)

2009-08-01T23:59:59.000Z

248

Southeast Interstate Low-Level Radioactive Waste Management Compact (multi-state)  

Broader source: Energy.gov [DOE]

The Southeast Interstate Low-Level Radioactive Waste Management Compact is administered by the Compact Commission. The Compact provides for rotating responsibility for the region's low-level...

249

Federal Energy Management Program: Energy Cost Calculator for Compact  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Compact Fluorescent Lamps to someone by E-mail Compact Fluorescent Lamps to someone by E-mail Share Federal Energy Management Program: Energy Cost Calculator for Compact Fluorescent Lamps on Facebook Tweet about Federal Energy Management Program: Energy Cost Calculator for Compact Fluorescent Lamps on Twitter Bookmark Federal Energy Management Program: Energy Cost Calculator for Compact Fluorescent Lamps on Google Bookmark Federal Energy Management Program: Energy Cost Calculator for Compact Fluorescent Lamps on Delicious Rank Federal Energy Management Program: Energy Cost Calculator for Compact Fluorescent Lamps on Digg Find More places to share Federal Energy Management Program: Energy Cost Calculator for Compact Fluorescent Lamps on AddThis.com... Energy-Efficient Products Federal Requirements Covered Product Categories

250

Effective temperature and compactivity of a lattice gas under gravity  

Science Journals Connector (OSTI)

The notion of longitudinal effective temperature and its relation with the Edwards compactivity are investigated in an abstract lattice gas model of granular material compacting under gravity and weak thermal vibration.

Mauro Sellitto

2002-10-10T23:59:59.000Z

251

Fundamental building blocks for a compact optoelectronic neural network processor  

E-Print Network [OSTI]

The focus of this thesis is interconnects within the Compact Optoelectronic Neural Network Processor. The goal of the Compact Optoelectronic Neural Network Processor Project (CONNPP) is to build a small, rugged neural ...

Ruedlinger, Benjamin Franklin, 1976-

2003-01-01T23:59:59.000Z

252

Alternative Fuels Data Center: Ozinga Adds 14 Natural Gas Concrete Mixers  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Ozinga Adds 14 Natural Ozinga Adds 14 Natural Gas Concrete Mixers to Its Fleet to someone by E-mail Share Alternative Fuels Data Center: Ozinga Adds 14 Natural Gas Concrete Mixers to Its Fleet on Facebook Tweet about Alternative Fuels Data Center: Ozinga Adds 14 Natural Gas Concrete Mixers to Its Fleet on Twitter Bookmark Alternative Fuels Data Center: Ozinga Adds 14 Natural Gas Concrete Mixers to Its Fleet on Google Bookmark Alternative Fuels Data Center: Ozinga Adds 14 Natural Gas Concrete Mixers to Its Fleet on Delicious Rank Alternative Fuels Data Center: Ozinga Adds 14 Natural Gas Concrete Mixers to Its Fleet on Digg Find More places to share Alternative Fuels Data Center: Ozinga Adds 14 Natural Gas Concrete Mixers to Its Fleet on AddThis.com... Sept. 28, 2013 Ozinga Adds 14 Natural Gas Concrete Mixers to Its Fleet

253

Evaluation of Multiple Corrrosion Protection Systems and Corrosion Inhibitors for Reinforced Concrete Bridge Decks  

E-Print Network [OSTI]

that a reduced water-cement ratio improves the corrosion resistance of conventional steel in uncracked concrete. The use of a corrosion inhibitor improves the corrosion resistance of conventional steel in both cracked and uncracked concrete, but provides...

Xing, Lihua

2010-05-10T23:59:59.000Z

254

Detection of defects in FRP-reinforced concrete with the acoustic-laser vibrometry method  

E-Print Network [OSTI]

Fiber-reinforced polymer (FRP) strengthening and retrofitting of concrete structural elements has become increasingly popular for civil infrastructure systems. When defects occur in FRP-reinforced concrete elements at the ...

Chen, Justin Gejune

2013-01-01T23:59:59.000Z

255

Lightweight concrete : investigations into the production of variable density cellular materials  

E-Print Network [OSTI]

This research focuses on the intersection between material composition and form in the development of a new type of concrete. As concrete is the most widely used building material in the world, innovation in this material ...

Cooke, Timothy Graham

2012-01-01T23:59:59.000Z

256

Evaluation and optimization of pervious concrete with respect to permeability and clogging  

E-Print Network [OSTI]

environmental effects associated with pavement runoff has also increased. These two issues have spurred the recent interest in pervious concrete pavements.Pervious concrete, however, has deficiencies which limit its application as pavements. These limitations...

Joung, Young

2010-01-20T23:59:59.000Z

257

Analysis of Influencing Factor on Fracture Energy of Concrete Containers for Nuclear Waste  

Science Journals Connector (OSTI)

The anti-fracture property of concrete container for nuclear waste was investigated to ensure its long-time ... the materials used to make concrete containers for nuclear waste.

Li Yi; Zhao Wen; Qujie

2012-01-01T23:59:59.000Z

258

Effect of Corrosion on the Seismic Response of a Single-Bent, Reinforced Concrete Bridge  

E-Print Network [OSTI]

The effect of corrosion on a single-bent, reinforced concrete (RC) bridge subject to seismic loading is the primary focus of this research. This work attempts to determine the effects of decreasing rebar diameter and concrete cover spalling...

Harvat, Jessica

2010-07-14T23:59:59.000Z

259

Effects from Alkali-Silica Reacton and Delayed Ettringite Formation on Reinforced Concrete Column Lap Splices  

E-Print Network [OSTI]

Reinforced concrete bridge columns can deteriorate prematurely due to the alkali-silica reaction (ASR) and/or delayed ettringite formation (DEF), causing internal expansion and cracking on the surface of the concrete. The performance...

Eck, Mary

2012-07-16T23:59:59.000Z

260

Experimental and Theoretical Studies on Mechanical Properties of Complex Oxides in Concrete  

E-Print Network [OSTI]

between CrO 4 - and SO 4 -ettringite Ca 6 (Al(OH) 6 ) 2 -[(on the crystal structure of ettringite, Cement and ConcretePreferred orientation of ettringite in concrete fractures,

Moon, Juhyuk

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Tests of concrete beams with externally-bonded glass-fiber fabric web reinforcement  

E-Print Network [OSTI]

of strengthening techniques used for rehabilitation of concrete structures is the method of using thin glass and carbon fiber fabrics, which are bonded externally to the surface of concrete. The study is focused on investigating the feasibility of using fabrics...

Dabholkar, Niranjan Shamsunder

2012-06-07T23:59:59.000Z

262

Relationship between Frequency of RFID Tags and Its Ability to Penetrate Fresh Concrete  

E-Print Network [OSTI]

, which is capable of transmitting information wirelessly. Previous research implemented using ultra high frequency RFID tags embedded in fresh concrete found that water could be the impediment for transmitting RFID signal from within concrete during early...

Sridharan, Rajasekaran

2011-08-08T23:59:59.000Z

263

Light Water Reactor Sustainability Nondestructive Evaluation for Concrete  

Broader source: Energy.gov (indexed) [DOE]

Nondestructive Evaluation for Nondestructive Evaluation for Concrete Research and Development Roadmap Light Water Reactor Sustainability Nondestructive Evaluation for Concrete Research and Development Roadmap Materials issues are a key concern for the existing nuclear reactor fleet as material degradation can lead to increased maintenance, increased downtown, and increased risk. Extending reactor life to 60 years and beyond will likely increase susceptibility and severity of known forms of degradation. Additionally, new mechanisms of materials degradation are also possible. The purpose of the US Department of Energy Office of Nuclear Energy's Light Water Reactor Sustainability (LWRS) Program is to develop technologies and other solutions that can improve the reliability, sustain the safety, and extend

264

Arc Energy Estimations: Applications in Lightning-Induced Concrete Spall  

SciTech Connect (OSTI)

After lightning contacts a building, the possibility of a physical break in its conductive path to ground may exist. Given such a break, an electric field may develop across the gap until it exceeds the breakdown strength of the non-conducting, or dielectric, material. Breakdown subsequently occurs and energy is dissipated during the development of an arc channel. If the dielectric is concrete, a concern exists that the energy available for arc formation may be capable of launching pieces of spall into sensitive equipment. This paper discusses the mechanisms of energy dissipation in arc formation and quantifies the energy available for concrete spall.

Tully, L K; Ong, M M

2008-06-03T23:59:59.000Z

265

High-performance, high-volume fly ash concrete  

SciTech Connect (OSTI)

This booklet offers the construction professional an in-depth description of the use of high-volume fly ash in concrete. Emphasis is placed on the need for increased utilization of coal-fired power plant byproducts in lieu of Portland cement materials to eliminate increased CO{sub 2} emissions during the production of cement. Also addressed is the dramatic increase in concrete performance with the use of 50+ percent fly ash volume. The booklet contains numerous color and black and white photos, charts of test results, mixtures and comparisons, and several HVFA case studies.

NONE

2008-01-15T23:59:59.000Z

266

The Thermal Conductivity of Low Density Concretes Containing Perlite  

E-Print Network [OSTI]

-Tov, "HEATING5 - An IBM 360 Heat Conduction Program," ORNL/CSD/tm-15(1977). Oak Ridge National Laboratory, Oak Ridge, TN 37831. [5J Expanded Shale Clay and Slate Institute, "Lightweight Concrete Information Sheet," No.4, Washington, D.C., 1958. [6J Moore..., J. P., R. S. Graves, J. G. Stradley, J. H. Hannah, and D. L. McElroy, "Some Thermal Transport Properties of a Limestone Concrete," ORNL/TM-2644 (August 1969), Oak Ridge National Laboratory, Oak Ridge, TN 37831. [7J Valore, R. C., Jr., "Cellular...

Yarbrough, D. W.

267

December 2002 Issue #11 2002 IDENTIFYING AND MANAGING COMPACTION  

E-Print Network [OSTI]

of compaction The need to conduct field operations in a timely and efficient manner has given rise to concerns

Balser, Teri C.

268

Research paper Pedogenic hematitic concretions from the Triassic New Haven Arkose, Connecticut  

E-Print Network [OSTI]

to elevated U. Mass balance calculations indicate that ~20% of the concretions are composed of iron oxides

Glotch, Timothy D.

269

Creep behavior of refractory concretes. First annual report, October 1, 1981-September 30, 1982  

SciTech Connect (OSTI)

Objectives are to evaluate the creep of alumina refractory concretes, determine differential transient creep strain of pristine specimens, develop a mathematical model for the creep behavior of refractory concretes, investigate the creep of commercial refractory concretes, and determine the effect of fiber reinforcements on the creep of concretes. After a summary of the first four years' progress, the technical progress during the fourth year is described in detail. 97 figures. (DLC)

McGee, T.D.

1982-12-01T23:59:59.000Z

270

Existing schemes for constructing high concrete dams and ways to improve them  

Science Journals Connector (OSTI)

1. Improvement of the existing cyclic methods of constructing concrete dams in recent years made it possible to ...

V. I. Teleshev; V. K. Loshak

1982-10-01T23:59:59.000Z

271

3-DIMENSIONAL COMPACT DISC (CD) MICROFLUIDIC PLATFORM Presented to the  

E-Print Network [OSTI]

3-DIMENSIONAL COMPACT DISC (CD) MICROFLUIDIC PLATFORM _______________ A Thesis Presented OF THE THESIS 3-Dimensional Compact Disc (CD) Microfluidic Platform by Nitin Edmund Harwood Master of Science in a compact disc (CD) microfluidics platform involving two or more layers. The traditional 2-Dimensional

Kassegne, Samuel Kinde

272

THE COMPACT STEEP SPECTRUM AND GHZ PEAKED SPECTRUM RADIO SOURCES  

E-Print Network [OSTI]

THE COMPACT STEEP SPECTRUM AND GHZ PEAKED SPECTRUM RADIO SOURCES Christopher P. O'Dea Space@stsci.edu ABSTRACT I review the radio to X­ray properties of GHz Peaked Spectrum (GPS) and Compact Steep Spectrum The GHz Peaked Spectrum (GPS) and Compact Steep Spectrum (CSS) radio sources make up significant fractions

273

A model for the evolution of concrete deterioration due to reinforcement corrosion  

Science Journals Connector (OSTI)

One of the most crucial factors affecting the service life of reinforced concrete (RC) structures attacked by aggressive ions is reinforcement corrosion. As the steel corrosion progresses, crack propagation in concrete medium endangers the serviceability ... Keywords: Analytical solution, Gradient reproducing kernel particle method (GRKPM), Mathematical modeling, Microcracking, Reinforced concrete structures, Reinforcement corrosion

Hossein M. Shodja; Keivan Kiani; Alireza Hashemian

2010-11-01T23:59:59.000Z

274

Experimentally Validated Compatibility Strut and Tie Modeling of Reinforced Concrete Bridge Piers  

E-Print Network [OSTI]

(drift) response .......................................................................... 95 Figure 3.13 Nonlinear response and early concrete cracking effects ............................. 97 Figure 3.14 Nonlinear concrete and steel response... design tool, STM is purely a force-based approach that implicitly assumes a lower bound solution by establishing a plastic truss consisting of concrete compression struts and steel tension ties, satisfying both equilibrium and ultimate material...

Scott, Reece Melby

2010-10-12T23:59:59.000Z

275

Paper No. RBCSR RESPONSE OF A BURIED CONCRETE PIPELINE TO GROUND  

E-Print Network [OSTI]

Paper No. RBCSR RESPONSE OF A BURIED CONCRETE PIPELINE TO GROUND RUPTURE: A FULL-SCALE EXPERIMENT A typical water distribution system includes a network of steel and concrete pipelines. Concrete segmental pipelines are particularly vulnerable to damage by ground rupture. Ground displacements may produce

Michalowski, Radoslaw L.

276

Performance of Multiple Corrosion Protection Systems for Reinforced Concrete Bridge Decks  

E-Print Network [OSTI]

.....................................................................................47 Table 2.5: Critical Chloride Corrosion Threshold for concrete with Corrosion Inhibitors (Xing et al. 2010)...................................................................................................49 Table 2.6: Field Test Specimen... Batch Schedule (Guo et al. 2006) ......................................54 Table 2.7: Field Test Specimen Plastic Concrete Properties ................................................55 Table 2.8: Field Test Specimen Hardened Concrete Properties...

O'Reilly, Matt

2011-01-18T23:59:59.000Z

277

Effect of Electric Arc Furnace Bag House Dust on Concrete Durability Researcher: Fahad Al-Mutlaq  

E-Print Network [OSTI]

Effect of Electric Arc Furnace Bag House Dust on Concrete Durability Researcher: Fahad Al billions of dollars annually. While steel is normally protected from corrosion in concrete by a passive of the effects of addition of Bag House Dust (BHD) on aspects of concrete durability. BHD is a fine powder

Birmingham, University of

278

Linseed Oil-Based Concrete Surface Treatment -for Building and Highway Structures in  

E-Print Network [OSTI]

, Linseed Oil-Based Concrete Surface Treatment -for Building and Highway Structures in Hong Kong Y using jour Canadian linseed oil- based sealants on concrete specimens madejrom G30120 and G45120 Keywords: Unseed Oil, Concrete Surface Treatment, Salt Spray Resistance, Carbonation, Bond Strength, Ultra

279

Compact AMS System At Yamagata University  

SciTech Connect (OSTI)

A new compact accelerator mass spectrometry (AMS) system has been installed in the Kaminoyama research institute at Yamagata University. The AMS system is based on a 0.5 MV Pelletron accelerator developed by National Electrostatics Corp. The performance of the system was investigated using C series samples (C1-C8), standard samples (HOxII), and reagent graphite without any chemical treatment. The precision of {sup 14}C measurements for the standard samples is typically higher than 0.3%. The ratio of {sup 14}C to {sup 12}C is less than 6x10{sup -16} for the reagent graphite. In this paper, we present the performance of the new compact AMS system, as well as of the fully automated 20-reactor graphite lines equipped at the research institute.

Tokanai, Fuyuki; Kato, Kazuhiro; Anshita, Minoru; Izumi, Akihiro; Sakurai, Hirohisa [Department of Physics, Faculty of Science, Yamagata University, Yamagata 990-8560 (Japan); Saito, Tsugio [Electronics equipment division, Hakuto Co., Ltd., Tokyo 160-8910 (Japan)

2011-06-01T23:59:59.000Z

280

Electric holding company regulation by multistate compact  

SciTech Connect (OSTI)

This article is divided into five sections. The first section discusses the market and regulatory environment of bulk power sales. The second presents the legal framework for compacting and discusses the minimal constitutional barriers presented by the Compact Clause. The next section discusses the economic considerations inherent in attempting to regulate a national activity through regional authorities. The fourth section more fully develops the administrative and political problems that regional regulation must overcome to be successful. Using the legal, economic, and policy framework developed in the preceding sections, the final section analyzes the proposal encompassed in Senate Bill 2607, a proposal by the Arkansas Public Service Commission and Entergy Corporation to create regional organizations to provide integrated resource planning.

Darr, F.P.

1993-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Star Formation in Las Campanas Compact Groups  

E-Print Network [OSTI]

Compact groups (CGs) of galaxies offer an exceptional laboratory for the study of dense galaxian environments --- where interactions, tidally induced activity, and mergers are expected to be at their highest rate of occurrence. Here, we present first results from a new catalogue of compact groups, one based upon the Las Campanas Redshift Survey (LCRS). Using the equivalent width of [OII]3727, we have studied the star formation activity in LCRS CGs: we find strong evidence of depressed star formation in CGs relative to that in loose groups or the field. Although much of this effect can be ascribed to morphological mix (CGs contain a high fraction of early-type galaxies), there is some evidence that the star formation rate in late-type galaxies is particularly deficient --- perhaps only one-half to one-third that of field spirals. We conclude that gas stripping mechanisms may play a role in CG environments.

Sahar S. Allam; Douglas L. Tucker; Huan Lin; Yasuhiro Hashimoto

1999-07-11T23:59:59.000Z

282

Thermally efficient compact fluorescent fixture systems  

SciTech Connect (OSTI)

Compact fluorescent lamps that can be inserted into conventional light fixtures are rapidly gaining acceptance as both a viable retrofit and new design approach to reducing lighting loads. Ideally, the compact fluorescent lamp should have the same light output as the incandescent lamp it replaces, but overheating inside typically small enclosed fixtures can reduce lumen output and hence lighting fixture efficiency by 15 to 20 percent. Fortunately, simple fixture modifications can erase this efficiency penalty, so that the full efficiency benefit of replacing incandescent lamps with fluorescent lamps can be realized. The paper describes such modifications and presents experimental data documenting the potential efficiency enhancement associated with thermal control systems. 4 refs., 7 figs.

Siminovitch, M.J.; Rubinstein, F.M.; Packer, M.

1991-04-01T23:59:59.000Z

283

Orthonormal bases of compactly supported wavelets  

E-Print Network [OSTI]

Abstract. Several variations are given on the construction of orthonormal bases of wavelets with compact support. They have, respectively, more symmetry, more regularity, or more vanishing moments for the scaling function than the examples constructed in Daubechies [Comm. Pure Appl. Math., 41 (1988), pp. 909-996]. Key words, wavelets, orthonormal bases, regularity, symmetry AMS(MOS) subject classifications. 26A16, 26A18, 26A27, 39B12

Ingrid Daubechies

1988-01-01T23:59:59.000Z

284

Construction of Conformally Compact Einstein Manifolds  

E-Print Network [OSTI]

We produce some explicit examples of conformally compact Einstein manifolds, whose conformal compactifications are foliated by Riemannian products of a closed Einstein manifold with the total space of a principal circle bundle over products of Kahler-Einstein manifolds. We compute the associated conformal invariants, i.e., the renormalized volume in even dimensions and the conformal anomaly in odd dimensions. As a by-product, we obtain some Riemannian products with vanishing Q-curvature.

Dezhong Chen

2009-08-11T23:59:59.000Z

285

Compact x-ray source and panel  

DOE Patents [OSTI]

A compact, self-contained x-ray source, and a compact x-ray source panel having a plurality of such x-ray sources arranged in a preferably broad-area pixelized array. Each x-ray source includes an electron source for producing an electron beam, an x-ray conversion target, and a multilayer insulator separating the electron source and the x-ray conversion target from each other. The multi-layer insulator preferably has a cylindrical configuration with a plurality of alternating insulator and conductor layers surrounding an acceleration channel leading from the electron source to the x-ray conversion target. A power source is connected to each x-ray source of the array to produce an accelerating gradient between the electron source and x-ray conversion target in any one or more of the x-ray sources independent of other x-ray sources in the array, so as to accelerate an electron beam towards the x-ray conversion target. The multilayer insulator enables relatively short separation distances between the electron source and the x-ray conversion target so that a thin panel is possible for compactness. This is due to the ability of the plurality of alternating insulator and conductor layers of the multilayer insulators to resist surface flashover when sufficiently high acceleration energies necessary for x-ray generation are supplied by the power source to the x-ray sources.

Sampayon, Stephen E. (Manteca, CA)

2008-02-12T23:59:59.000Z

286

The Evolution of Compact Binary Star Systems  

E-Print Network [OSTI]

We review the formation and evolution of compact binary stars consisting of white dwarfs (WDs), neutron stars (NSs), and black holes (BHs). Mergings of compact binary stars are expected to be the most important sources for the forthcoming gravitational-wave (GW) astronomy. In the first part of the review, we discuss observational manifestations of close binary stars with NS and/or black components and their merger rate, crucial points in the formation and evolution of compact stars in binary systems, including the treatment of the natal kicks which NSs and BHs acquire during the core collapse of massive stars and the common envelope phase of binary evolution, which are most relevant to the merging rates of NS-NS, NS-BH and BH-BH binaries. The second part of the review is devoted mainly to formation and evolution of binary WDs and their observational manifestations, including their role as progenitors of cosmologically important thermonuclear SN Ia. We also consider AM CVn-stars which are thought to be the best verification binary GW sources for future low-frequency GW space interferometers.

Konstantin Postnov; Lev Yungelson

2014-03-21T23:59:59.000Z

287

Structural Engineering Seminar Series Ultra-High Performance Concrete Construction  

E-Print Network [OSTI]

performance and resistance against environmental degradation. UHPC is defined as a concrete fiber composite for Our Future Infrastructure? by Kay Wille, PhD Assistant Professor, Civil and Environmental Engineering and conference proceedings. It has been used in various forms in structural and architectural elements, as a bond

Kamat, Vineet R.

288

COMPOSITE PORTLAND CEMENT CONCRETE PAVEMENTS (Tollway) Effective: January 30, 2012  

E-Print Network [OSTI]

COMPOSITE PORTLAND CEMENT CONCRETE PAVEMENTS (Tollway) Effective: January 30, 2012 Revised: May 8 for special applications to composite pavements as shown and described on the Drawings and in this Special as required; 5. Constructing the composite pavement on a prepared subgrade, or subbase, without forms. 6

289

Field Testing for Understanding In Situ Concrete Crosstie  

E-Print Network [OSTI]

Slide 7 · Linear Potentiometer Fixture ­ Welded steel frame ­ Designed for flexible positioning ­ BoltedField Testing for Understanding In Situ Concrete Crosstie and Fastener Behavior Justin Grassé, David Lange 2012 Joint Rail Conference Philadelphia, PA 17-19 April 2012 #12;Field Testing

Barkan, Christopher P.L.

290

Pentek concrete scabbling system: Baseline report; Greenbook (chapter)  

SciTech Connect (OSTI)

The Pentek scabbling technology was tested at Florida International University (FIU) and is being evaluated as a baseline technology. This report evaluates it for safety and health issues. It is a commercially available technology and has been used for various projects at locations throughout the country. The Pentek concrete scabbling system consisted of the MOOSE, SQUIRREL-I, and SQUIRREL-III scabblers. The scabblers are designed to scarify concrete floors and slabs using cross-section, tungsten carbide tipped bits. The bits are designed to remove concrete in 318 inch increments. The bits are either 9-tooth or demolition type. The scabblers are used with a vacuum system designed to collect and filter the concrete dust and contamination that is removed from the surface. The safety and health evaluation conducted during the testing demonstration focused on two main areas of exposure: dust and noise. Dust exposure was minimal, but noise exposure was significant. Further testing for each of these exposures is recommended. Because of the outdoor environment where the testing demonstration took place, results may be inaccurate. It is feasible that the dust and noise levels will be higher in an enclosed operating environment. Other areas of concern were arm-hand vibration, whole-body vibration, ergonomics, heat stress, tripping hazards, electrical hazards, machine guarding, and lockout/tagout.

NONE

1997-07-31T23:59:59.000Z

291

Center for By-Products Utilization Sustainable Concrete with  

E-Print Network [OSTI]

landfilling them but also leads to the reduction of the the environmental pollution. #12;Center for ByCenter for By-Products Utilization Sustainable Concrete with Industrial and Post-Consumer By Construction Materials and Technologies, Ancona, Italy, June 2010 #12;Center for By-Products Utilization Why

Saldin, Dilano

292

MICROWAVE-BASED NDE OF FRP-JACKETED CONCRETE STRUCTURES  

E-Print Network [OSTI]

MICROWAVE-BASED NDE OF FRP-JACKETED CONCRETE STRUCTURES Yoo Jin Kim, Franco De Flaviis University are presented in this paper. KEY WORDS: Microwave, Non-Destructive Evaluation (NDE), FRP Jacket, Imaging Technol not be visually observed. Various nondestructive evaluation (NDE) techniques have been studied to detect cracks

De Flaviis, Franco

293

1 INTRODUCTION Concrete bridge decks are high-performance  

E-Print Network [OSTI]

conditions of reinforced concrete bridge decks with multiple non-destructive evaluation (NDE) techniques activities. The present state-of-the-art is that multiple NDE techniques are available, but that the accuracy and reliability of the methods are not guaranteed. NDE techniques generally employ electromagnetic

Huston, Dryver R.

294

Research in nondestructive evaluation techniques for nuclear reactor concrete structures  

SciTech Connect (OSTI)

The purpose of the Materials Aging and Degradation (MAaD) Pathway of the Department of Energy's Light Water Reactor Sustainability (LWRS) Program is to develop the scientific basis for understanding and predicting longterm environmental degradation behavior of material in nuclear power plants and to provide data and methods to assess the performance of systems, structures, and components (SSCs) essential to safe and sustained nuclear power plant operations. The understanding of aging-related phenomena and their impacts on SSCs is expected to be a significant issue for any nuclear power plant planning for long-term operations (i.e. service beyond the initial license renewal period). Management of those phenomena and their impacts during long-term operations can be better enable by improved methods and techniques for detection, monitoring, and prediction of SSC degradation. The MAaD Pathway R and D Roadmap for Concrete, 'Light Water Reactor Sustainability Nondestructive Evaluation for Concrete Research and Development Roadmap', focused initial research efforts on understanding the recent concrete issues at nuclear power plants and identifying the availability of concrete samples for NDE techniques evaluation and testing. [1] An overview of the research performed by ORNL in these two areas is presented here.

Clayton, Dwight; Smith, Cyrus [Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831 (United States)

2014-02-18T23:59:59.000Z

295

Scanning Electron Microscopy in Concrete Petrography Paul E. Stutzman  

E-Print Network [OSTI]

hydroxide, needle-like habit of ettringite, and the sheet-like habit of calcium- silicate I C-S-H, platy-Type II C-S-H, and ettringite needles. Calcium Hydroxide Ettringite Calcium Hydroxide Ettringite Calcium-Silicate-Hydrate 15 µµm 10 µµm #12;#12;Calcium Hydroxide in Concrete 63 Figure 2

Bentz, Dale P.

296

INTERIM REPORT ON CONCRETE DEGRADATION MECHANISMS AND ONLINE MONITORING TECHNIQUES  

SciTech Connect (OSTI)

The existing fleets of nuclear power plants in the United States have initial operating licenses of 40 years, though most these plants have applied for and received license extensions. As plant structures, systems, and components age, their useful life—considering both structural integrity and performance—is reduced as a result of deterioration of the materials. The online monitoring of concrete structure conducted under the Advanced Instrumentation, Information, and Control Technologies Pathway of the Light Water Reactor Sustainability program at Idaho National Laboratory will develop and demonstrate concrete structures health monitoring capabilities. Assessment and management of aging concrete structures in nuclear plants require a more systematic approach than simple reliance on existing code margins of safety. Therefore, the structural health monitoring is required to produce actionable information regarding structural integrity that supports operational and maintenance decisions. Through this research project, several national laboratories and Vanderbilt University proposes to develop a framework of research activities for the health monitoring of nuclear power plant concrete structures that includes integration of four elements—damage modeling, monitoring, data analytics, and uncertainty quantification. This report briefly discusses available techniques and ongoing challenges in each of the four elements of the proposed framework with emphasis on degradation mechanisms and online monitoring techniques.

Sankaran Mahadevan; Vivek Agarwal; Kyle Neal; David Kosson; Douglas Adams

2014-09-01T23:59:59.000Z

297

Mechanics of Insulator Behavior in Concrete Crosstie Fastening Systems  

E-Print Network [OSTI]

gauge · Protect shoulder and attenuate load entering shoulder · Provide electrical isolation betweenMechanics of Insulator Behavior in Concrete Crosstie Fastening Systems Joint Rail Conference and causes · Relevant material properties related to failure modes · Preliminary testing and results · Future

Barkan, Christopher P.L.

298

Predicting Collapse of Steel and Reinforced-Concrete Frame Buildings  

E-Print Network [OSTI]

Predicting Collapse of Steel and Reinforced-Concrete Frame Buildings in Different Types of Ground method is developed to predict P- collapse of frame buildings in earthquakes. The method incorporates two types of buildings (steel and RC moment-frame buildings) and three types of ground motions (near

Greer, Julia R.

299

An attempt to validate the ultra-accelerated microbar and the concrete performance test with the degree of AAR-induced damage observed in concrete structures  

SciTech Connect (OSTI)

There is little knowledge about the relation between AAR-induced damage observed in structures and the expansion potential obtained with accelerated tests. In this study, aggregates used in structures damaged by AAR were tested with the microbar test (MBT/AFNOR XP 18-594) and the concrete performance test (CPT/AFNOR P18-454). After the tests, the samples were examined using optical and scanning electron microscopy. Based on the results, the significance of the microbar test has to be examined very critically. The agreement of measured expansion, reacted rock types and the composition of the reaction products between the on-site concrete and the reproduced concrete subjected to the CPT clearly indicates that the reaction mechanisms in the structure and in the concrete performance test are comparable. As such, the concrete performance test seems to be an appropriate tool to test the potential reactivity of specific concrete mixtures.

Leemann, Andreas, E-mail: andreas.leemann@empa.ch [Empa, Dübendorf (Switzerland)] [Empa, Dübendorf (Switzerland); Merz, Christine [Holcim (Schweiz) AG, Würenlingen (Switzerland)] [Holcim (Schweiz) AG, Würenlingen (Switzerland)

2013-07-15T23:59:59.000Z

300

Numerical homogenization of concrete microstructures without explicit meshes  

SciTech Connect (OSTI)

Life management of electric hydro or nuclear power plants requires to estimate long-term concrete properties on facilities, for obvious safety and serviceability reasons. Decades-old structures are foreseen to be operational for several more decades. As a large number of different concrete formulations are found in EDF facilities, empirical models based on many experiments cannot be an option for a large fleet of power plant buildings. To build predictive models, homogenization techniques offer an appealing alternative. To properly upscale creep, especially at long term, a rather precise description of the microstructure is required. However, the complexity of the morphology of concrete poses several challenges. In particular, concrete is formulated to maximize the packing density of the granular skeleton, leading to aggregates spanning several length scales with small inter particle spacings. Thus, explicit meshing of realistic concrete microstructures is either out of reach of current meshing algorithms or would produce a number of degrees of freedom far higher than the current generic FEM codes capabilities. This paper proposes a method to deal with complex matrix-inclusions microstructures such as the ones encountered at the mortar or concrete scales, without explicitly meshing them. The microstructure is superimposed to an independent mesh, which is a regular Cartesian grid. This inevitably yields so called 'gray elements', spanning across multiple phases. As the reliability of the estimate of the effective properties highly depends on the behavior affected to these gray elements, special attention is paid to them. As far as the question of the solvers is concerned, generic FEM codes are found to lack efficiency: they cannot reach high enough levels of discretization with classical free meshes, and they do not take advantage of the regular structure of the mesh. Thus, a specific finite differences/finite volumes solver has been developed. At first, generic off-the-shelf linear system solvers were used. To further improve the efficiency in terms of memory requirements, specific variants of the preconditioned conjugate gradient were implemented. This allowed to homogenize the conductivity of a concrete-like microstructure using more than 10{sup 9} degrees of freedom on a rather common hardware for 2010 (a PC embedding 48 GB of RAM). Taking benefit of the properties of the regular Cartesian grid we have also investigated a multi-level method to improve the CPU efficiency of the code.

Sanahuja, Julien, E-mail: julien.sanahuja@edf.fr; Toulemonde, Charles, E-mail: charles.toulemonde@edf.fr

2011-12-15T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

HYDRAULIC AND PHYSICAL PROPERTIES OF SALTSTONE GROUTS AND VAULT CONCRETES  

SciTech Connect (OSTI)

The Saltstone Disposal Facility (SDF), located in the Z-Area of the Savannah River Site (SRS), is used for the disposal of low-level radioactive salt solution. The SDF currently contains two vaults: Vault 1 (6 cells) and Vault 4 (12 cells). Additional disposal cells are currently in the design phase. The individual cells of the saltstone facility are filled with saltstone. Saltstone is produced by mixing the low-level radioactive salt solution, with blast furnace slag, fly ash, and cement (dry premix) to form a dense, micro-porous, monolithic, low-level radioactive waste form. The saltstone is pumped into the disposal cells where it subsequently solidifies. Significant effort has been undertaken to accurately model the movement of water and contaminants through the facility. Key to this effort is an accurate understanding of the hydraulic and physical properties of the solidified saltstone. To date, limited testing has been conducted to characterize the saltstone. The primary focus of this task was to estimate the hydraulic and physical properties of three types of saltstone and two vault concretes. The saltstone formulations included saltstone premix batched with (1) Deliquification, Dissolution, and Adjustment (DDA) salt simulant (w/pm 0.60), (2) Actinide Removal Process (ARP)/Modular Caustic Side Solvent Extraction Unit (MCU) salt simulant (w/pm 0.60), and (3) Salt Waste Processing Facility (SWPF) salt simulant (w/pm 0.60). The vault concrete formulations tested included the Vault 1/4 concrete and two variations of the Vault 2 concrete (Mix 1 and Mix 2). Wet properties measured for the saltstone formulations included yield stress, plastic viscosity, wet unit weight, bleed water volume, gel time, set time, and heat of hydration. Hydraulic and physical properties measured on the cured saltstone and concrete samples included saturated hydraulic conductivity, moisture retention, compressive strength, porosity, particle density, and dry bulk density. These properties were determined following a minimum 28 day curing period. Additional testing of the three saltstone formulations was conducted following a minimum 90 day curing period. The compressive strength of each saltstone and concrete material was measured at approximately 14, 28, 56, and 90 days. Recommended hydraulic property values for each saltstone grout and the vault concretes are provided. The hydraulic properties provided for each material include the saturated hydraulic conductivity, dry bulk density, particle density, and porosity. In addition, water retention data are presented for each material along with the van Genuchten transport parameters as determined using the RETC code.

Dixon, K; John Harbour, J; Mark Phifer, M

2008-11-25T23:59:59.000Z

302

Interstate Oil and Gas Conservation Compact (Maryland) | Department of  

Broader source: Energy.gov (indexed) [DOE]

Interstate Oil and Gas Conservation Compact (Maryland) Interstate Oil and Gas Conservation Compact (Maryland) Interstate Oil and Gas Conservation Compact (Maryland) < Back Eligibility Commercial Construction Fed. Government Industrial Institutional Investor-Owned Utility Local Government Municipal/Public Utility Retail Supplier Rural Electric Cooperative Systems Integrator Tribal Government Utility Program Info State Maryland Program Type Siting and Permitting Provider Interstate Oil and Gas Compact Commission This legislation authorizes the State to join the Interstate Compact for the Conservation of Oil and Gas. The Compact is an agreement that has been entered into by 30 oil- and gas-producing states, as well as eight associate states and 10 international affiliates (including seven Canadian provinces). Members participate in the Interstate Oil and Gas Compact

303

Finite Element Stress Computations Applied to Images of Damaged Concrete: A Possible New Diagnostic Tool for Concrete Petrography  

E-Print Network [OSTI]

Reprinted from the Twenty-Third International Conference on Cement Microscopy. Proceedings. International in the assessment of degradation mechanisms. #12;INTRODUCTION There is a recurring problem in the field of concrete and environmental history can help guide the petrographer's approach to the problem. For example, if the temperature

Bentz, Dale P.

304

Activities in support of continuing the service of nuclear power plant concrete structures  

SciTech Connect (OSTI)

In general, nuclear power plant concrete structure s performance has been very good; however, aging of concrete structures occurs with the passage of time that can potentially result in degradation if is effects are not controlled. Safety-related nuclear power plant concrete structures are described. In-service inspection and testing requirements in the U.S. are summarized. The interaction of the license renewal process and concrete structures is noted. A summary of operating experience related to aging of nuclear power plant concrete structures is provided. Several candidate areas are identified where additional research would be beneficial for aging management of nuclear power plant concrete structures. Finally, an update on recent activities at Oak Ridge National Laboratory related to aging management of nuclear power plant concrete structures is provided.

Naus, Dan J [ORNL

2012-01-01T23:59:59.000Z

305

Compact Imaging Spectrometer Utilizing Immersed Gratings  

DOE Patents [OSTI]

A compact imaging spectrometer with an immersive diffraction grating that compensates optical distortions. The imaging spectrometer comprises an entrance slit for transmitting light, a system for receiving the light and directing the light, an immersion grating, and a detector array. The entrance slit, the system for receiving the light, the immersion grating, and the detector array are positioned wherein the entrance slit transmits light to the system for receiving the light and the system for receiving the light directs the light to the immersion grating and the immersion grating receives the light and directs the light through an optical element to the detector array.

Chrisp, Michael P. (Danville, CA); Lerner, Scott A. (Corvallis, OR); Kuzmenko, Paul J. (Livermore, CA); Bennett, Charles L. (Livermore, CA)

2006-03-21T23:59:59.000Z

306

Compact fluorescent lamp applications in luxury hotels  

SciTech Connect (OSTI)

Over the past several years, consumers, lighting designers, and energy conservationists have paid increasing attention to the special characteristics of compact fluorescent lamps (CFLs). CFLs can typically be used to replace incandescent lamps of three to four times their own wattage, and their color rendering indices (CRIs)-80 to 85-make them virtually indistinguishable from incandescents. The typical 10,0000-hour life of a CFL often makes savings in labor its most desirable feature when compared to a shorter-lived incandescent lamp.

Gilleskie, R.J.

1996-01-01T23:59:59.000Z

307

Compact proton spectrometers for measurements of shock  

SciTech Connect (OSTI)

The compact Wedge Range Filter (WRF) proton spectrometer was developed for OMEGA and transferred to the National Ignition Facility (NIF) as a National Ignition Campaign (NIC) diagnostic. The WRF measures the spectrum of protons from D-{sup 3}He reactions in tuning-campaign implosions containing D and {sup 3}He gas; in this work we report on the first proton spectroscopy measurement on the NIF using WRFs. The energy downshift of the 14.7-MeV proton is directly related to the total {rho}R through the plasma stopping power. Additionally, the shock proton yield is measured, which is a metric of the final merged shock strength.

Mackinnon, A; Zylstra, A; Frenje, J A; Seguin, F H; Rosenberg, M J; Rinderknecht, H G; Johnson, M G; Casey, D T; Sinenian, N; Manuel, M; Waugh, C J; Sio, H W; Li, C K; Petrasso, R D; Friedrich, S; Knittel, K; Bionta, R; McKernan, M; Callahan, D; Collins, G; Dewald, E; Doeppner, T; Edwards, M J; Glenzer, S H; Hicks, D; Landen, O L; London, R; Meezan, N B

2012-05-02T23:59:59.000Z

308

The design of offshore concrete structures in the future  

SciTech Connect (OSTI)

During the last couple of decades a number of offshore concrete structures have been realized, particularly in the North Sea, but also in other locations. These structures support extensive hydrocarbon production activities of considerable economic worth. Four recent and ongoing projects are described in some detail, to highlight the design and construction of such large projects. Design is important for the successful realization of expensive and multidisciplinary offshore projects. This is true for the detail engineering phase as well as the preceding conceptual and pre-engineering phases. The key to successful design of offshore concrete structures in the future lies in the understanding of key elements of the conceptual design, and their mutual dependence.

Johnsrud, J.K.; Olsen, T.O.

1994-12-31T23:59:59.000Z

309

Analysis of thermal transfer of reinforced concrete submarine oil tanks  

SciTech Connect (OSTI)

The temperature distributions of reinforced concrete submarine oil tanks (RCSOT) obtained by the flat wall method and the cylinder wall method, are compared with the experimental data of the thermal transfer of the RCSOT. The precision and suitable scope of the different methods are discussed. The principle for selecting analysis method for solving thermal transfer of the RCSOT is given. The analytical and experimental temperature distributions show that the wall of the RCSOT should consist of double layer walls and the empty space between double layer walls should be filled with sand or other heat insulation materials to reduce the temperature difference between the inner and outer surfaces of the wall and to prevent the concrete from cracking.

Song, Y.P.; Zhao, G.F. [Dalian Univ. of Technology (China)

1994-12-31T23:59:59.000Z

310

Northwest Interstate Compact on Low-Level Radioactive Waste Management  

Broader source: Energy.gov (indexed) [DOE]

Northwest Interstate Compact on Low-Level Radioactive Waste Northwest Interstate Compact on Low-Level Radioactive Waste Management (Multiple States) Northwest Interstate Compact on Low-Level Radioactive Waste Management (Multiple States) < Back Eligibility Utility Fed. Government Commercial Investor-Owned Utility State/Provincial Govt Industrial Construction Municipal/Public Utility Local Government Rural Electric Cooperative Tribal Government Institutional Nonprofit Program Info Start Date 1981 State Alaska Program Type Siting and Permitting Provider Northwest Interstate Compact The Northwest Interstate Compact on Low-Level Radioactive Waste Management, enacted in 1981, was ratified by Congress in 1985. The Compact is a cooperative effort of the party states to protect their citizens, and maintain and enhance economic viability, while sharing the responsibilities

311

Atlantic Interstate Low-Level Radioactive Waste Management Compact (South  

Broader source: Energy.gov (indexed) [DOE]

Atlantic Interstate Low-Level Radioactive Waste Management Compact Atlantic Interstate Low-Level Radioactive Waste Management Compact (South Carolina) Atlantic Interstate Low-Level Radioactive Waste Management Compact (South Carolina) < Back Eligibility Utility Commercial Agricultural Investor-Owned Utility Industrial Construction Municipal/Public Utility Local Government Installer/Contractor Rural Electric Cooperative Tribal Government Program Info Start Date 1986 State South Carolina Program Type Environmental Regulations Siting and Permitting Provider Atlantic Compact Commission The Atlantic (Northeast) Interstate Low-Level Radioactive Waste Management Compact is a cooperative effort to plan, regulate, and administer the disposal of low-level radioactive waste in the region. The states of Connecticut, New Jersey, and South Carolina are party to this compact

312

Sabine River Compact (Multiple States) | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Sabine River Compact (Multiple States) Sabine River Compact (Multiple States) Sabine River Compact (Multiple States) < Back Eligibility Utility Fed. Government Commercial Agricultural Investor-Owned Utility State/Provincial Govt Industrial Construction Municipal/Public Utility Local Government Residential Installer/Contractor Rural Electric Cooperative Tribal Government Low-Income Residential Schools Retail Supplier Institutional Multi-Family Residential Systems Integrator Fuel Distributor Nonprofit General Public/Consumer Transportation Savings Category Water Buying & Making Electricity Home Weatherization Program Info State Texas Program Type Siting and Permitting Provider Sabine River Compact Commission The Sabine River Compact Commission administers the Sabine River Compact to ensure that Texas receives its equitable share of quality water from the

313

Compact wavefunctions from compressed imaginary time evolution  

E-Print Network [OSTI]

Simulation of quantum systems promises to deliver physical and chemical predictions for the frontiers of technology. Unfortunately, the exact representation of these systems is plagued by the exponential growth of dimension with the number of particles, or colloquially, the curse of dimensionality. The success of approximation methods has hinged on the relative simplicity of physical systems with respect to the exponentially complex worst case. Exploiting this relative simplicity has required detailed knowledge of the physical system under study. In this work, we introduce a general and efficient black box method for many-body quantum systems that utilizes technology from compressed sensing to find the most compact wavefunction possible without detailed knowledge of the system. It is a Multicomponent Adaptive Greedy Iterative Compression (MAGIC) scheme. No knowledge is assumed in the structure of the problem other than correct particle statistics. This method can be applied to many quantum systems such as spins, qubits, oscillators, or electronic systems. As an application, we use this technique to compute ground state electronic wavefunctions of hydrogen fluoride and recover 98% of the basis set correlation energy or equivalently 99.996% of the total energy with $50$ configurations out of a possible $10^7$. Building from this compactness, we introduce the idea of nuclear union configuration interaction for improving the description of reaction coordinates and use it to study the dissociation of hydrogen fluoride and the helium dimer.

Jarrod R. McClean; Alán Aspuru-Guzik

2014-09-25T23:59:59.000Z

314

Thermodynamics of magnetized binary compact objects  

SciTech Connect (OSTI)

Binary systems of compact objects with electromagnetic field are modeled by helically symmetric Einstein-Maxwell spacetimes with charged and magnetized perfect fluids. Previously derived thermodynamic laws for helically symmetric perfect-fluid spacetimes are extended to include the electromagnetic fields, and electric currents and charges; the first law is written as a relation between the change in the asymptotic Noether charge {delta}Q and the changes in the area and electric charge of black holes, and in the vorticity, baryon rest mass, entropy, charge and magnetic flux of the magnetized fluid. Using the conservation laws of the circulation of magnetized flow found by Bekenstein and Oron for the ideal magnetohydrodynamic fluid, and also for the flow with zero conducting current, we show that, for nearby equilibria that conserve the quantities mentioned above, the relation {delta}Q=0 is satisfied. We also discuss a formulation for computing numerical solutions of magnetized binary compact objects in equilibrium with emphasis on a first integral of the ideal magnetohydrodynamic-Euler equation.

Uryu, Koji [Department of Physics, University of the Ryukyus, Senbaru, Nishihara, Okinawa 903-0213 (Japan); Gourgoulhon, Eric [Laboratoire Univers et Theories, UMR 8102 du CNRS, Observatoire de Paris, Universite Paris Diderot, F-92190 Meudon (France); Markakis, Charalampos [Department of Physics, University of Wisconsin-Milwaukee, Post Office Box 413, Milwaukee, Wisconsin 53201 (United States)

2010-11-15T23:59:59.000Z

315

FRPs in Reinforced and Prestressed Concrete Applications: Moving Forward  

E-Print Network [OSTI]

and the rotation capacity requirements. The principle was demonstrated by testing in flexure a number of small scale pretensioned concrete beams with aramid FRP tendons [48]. Beams with fully bonded, unbonded or partially bonded tendons were considered... , as the tendons are external to the structure, the monitoring and testing of the tendons is greatly facilitated. Aramid fibre ropes have been used in both new construction and also to upgrade existing structures [54]. A study by Leung considered beams...

Lees, Janet M.

2001-08-29T23:59:59.000Z

316

Evaluation of a microplane model for progressive fracture in concrete  

E-Print Network [OSTI]

in stress with increasing strain. A realistic constitutive model which accounts I' or the post ? cracking regime or strain ? softening region is an important part in the nonlinear analysis of concrete structures. The purpose of this study is to evaluate a..., as in metals, but also by microcracking and void formations. It is this major difference between metals and geomaterials that requires a model which accounts for the stress decrements caused by microcracking and void formations. The plastic ? fracturing...

Loper, James Harris

2012-06-07T23:59:59.000Z

317

Rutting and drainage design methodology for a concrete block pavement  

E-Print Network [OSTI]

. . . . 2 Experience based design chart used in Denmark. . . . . 10 3 Experience based design chart used in South Africa. . . . . . . . . . . . . . 4 Marais' design curve based on Westergaard's slab theory. . . . . 12 5 CCA design chart used in Great... 150 Fi 3 ? Ex erience based desi n chart used in South Africa. ' ~ Modifications Based On Existing Design Procedures For Pavements One of the first design procedures for concrete block pavements was developed by Marais in 1967 and based on rigid...

Poduska, Daryl Jason

1998-01-01T23:59:59.000Z

318

Informationsveranstaltung 21.10.2014, HIL E 4, 16.45 Uhr  

E-Print Network [OSTI]

of Self Compacted Clay Concrete Sustainability assessment of Concrete Solutions Robustness of building

319

Corrosion of reinforced concrete in the Persian Gulf region  

SciTech Connect (OSTI)

The Kuwait liquefied gas/sulfur (LGS) plant is located on a small island in the southern part of the Persian Gulf. The plant was built in phases between 1973 and 1977. Designed to manufacture liquefied natural and petroleum gas and to extract sulfur, the LGS plant consists of two similar process unit trains served by a common boiler and utility plant. The major reinforced-concrete structures at the plant include the cooling water outfall, the cooling water intake, the operations building, structures supporting elevated pipe and equipment, boiler stack foundations, bridge over the flume, the loading jetty, sulfur plant structures, substations, and storage tank foundations. The first signs of distress in the plant structures were reported in 1980: cracking, spalling, and delamination of concrete cover and corrosion of reinforcing steel. In some cases, deterioration had progressed to the extent that safety and life expectancy of the structures were at risk. Subsequently, several investigations were conducted on various structures from 1980 to 1987 to identify the causes of the deterioration. The principal cause of the deterioration was corrosion of reinforcing steel caused by the presence of chlorides; marine salts were the main source. Construction-related contributing factors included insufficient concrete cover, use of sulfate-resistant (ASTM Type V) portland cement, and an elevated water-to-cement ratio.

Novokshchenov, V. [Kuwait Inst. for Scientific Research, Safat (Kuwait)

1995-01-01T23:59:59.000Z

320

Western Interstate Nuclear Compact State Nuclear Policy (Multiple States) |  

Broader source: Energy.gov (indexed) [DOE]

Western Interstate Nuclear Compact State Nuclear Policy (Multiple Western Interstate Nuclear Compact State Nuclear Policy (Multiple States) Western Interstate Nuclear Compact State Nuclear Policy (Multiple States) < Back Eligibility Agricultural Commercial Construction Fed. Government Fuel Distributor Industrial Institutional Investor-Owned Utility Local Government Municipal/Public Utility Nonprofit Retail Supplier Rural Electric Cooperative State/Provincial Govt Systems Integrator Transportation Tribal Government Utility Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State Arizona Program Type Siting and Permitting Provider Western Interstate Energy Board Legislation authorizes states' entrance into the Western Interstate Nuclear Compact, which aims to undertake the cooperation of participating states in

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

DEFINITIONS OF COMPACTNESS AND THE AXIOM OF CHOICE ...  

E-Print Network [OSTI]

Apr 17, 2001 ... [gj] L. Gillman and M. Jerrison, Rings of Continuous Functions, Van Nostrand, 1960. [he] H. Herrlich, Compactness and the axiom of choice, ...

1910-20-32T23:59:59.000Z

322

Appalachian States Low-Level Radioactive Waste Compact (Maryland)  

Broader source: Energy.gov [DOE]

This legislation authorizes Maryland's entrance into the Appalachian States Low-Level Radioactive Waste Compact, which seeks to promote interstate cooperation for the proper management and disposal...

323

Preliminary study of neutron absorption by concrete with boron carbide addition  

SciTech Connect (OSTI)

Concrete has become a conventional material in construction of nuclear reactor due to its properties like safety and low cost. Boron carbide was added as additives in the concrete construction as it has a good neutron absorption property. The sample preparation for concrete was produced with different weight percent of boron carbide powder content. The neutron absorption rate of these samples was determined by using a fast neutron source of Americium-241/Be (Am-Be 241) and detection with a portable backscattering neutron detector. Concrete with 20 wt % of boron carbide shows the lowest count of neutron transmitted and this indicates the most neutrons have been absorbed by the concrete. Higher boron carbide content may affect the concrete strength and other properties.

Abdullah, Yusof, E-mail: yusofabd@nuclearmalaysia.gov.my; Yusof, Mohd Reusmaazran; Zali, Nurazila Mat; Ahmad, Megat Harun Al Rashid Megat; Yazid, Hafizal [Malaysian Nuclear Agency, Bangi, 43000 Kajang, Selangor (Malaysia); Ariffin, Fatin Nabilah Tajul; Ahmad, Sahrim [School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor (Malaysia); Hamid, Roszilah [Department of Civil and Structural Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor (Malaysia); Mohamed, Abdul Aziz [College of Engineering, Universiti Tenaga National, Jalan Ikram-Uniten, 43000 Kajang, Selangor (Malaysia)

2014-02-12T23:59:59.000Z

324

An overview on the potential of geopolymers for concrete infrastructure rehabilitation  

Science Journals Connector (OSTI)

Infrastructure rehabilitation represents a multitrillion dollar opportunity for the construction industry. In USA alone the rehabilitation needs are estimated to exceed 1.6 trillion dollars over the next 5 years. Since the majority of the existent infrastructures are concrete based this means that concrete infrastructure rehabilitation is a hot issue to be dealt with. Besides the sooner concrete deterioration is tackled the lower are the rehabilitation costs. This paper provides a literature review on concrete repair materials, highlighting the current problems face by them. It covers concrete surface treatments, patch repair and FRP strengthening. The case of trenchless rehabilitation of concrete sewage pipelines is also discussed. The potential of geopolymers to overcome those limitations is analyzed.

F. Pacheco-Torgal; Z. Abdollahnejad; S. Miraldo; S. Baklouti; Y. Ding

2012-01-01T23:59:59.000Z

325

TIDAL NOVAE IN COMPACT BINARY WHITE DWARFS  

SciTech Connect (OSTI)

Compact binary white dwarfs (WDs) undergoing orbital decay due to gravitational radiation can experience significant tidal heating prior to merger. In these WDs, the dominant tidal effect involves the excitation of outgoing gravity waves in the inner stellar envelope and the dissipation of these waves in the outer envelope. As the binary orbit decays, the WDs are synchronized from outside in (with the envelope synchronized first, followed by the core). We examine the deposition of tidal heat in the envelope of a carbon-oxygen WD and study how such tidal heating affects the structure and evolution of the WD. We show that significant tidal heating can occur in the star's degenerate hydrogen layer. This layer heats up faster than it cools, triggering runaway nuclear fusion. Such 'tidal novae' may occur in all WD binaries containing a CO WD, at orbital periods between 5 minutes and 20 minutes, and precede the final merger by 10{sup 5}-10{sup 6} years.

Fuller, Jim; Lai Dong [Department of Astronomy, Cornell University, Ithaca, NY 14850 (United States)

2012-09-01T23:59:59.000Z

326

Compact microwave ion source for industrial applications  

SciTech Connect (OSTI)

A 2.45 GHz microwave ion source for ion implanters has many good properties for industrial application, such as easy maintenance and long lifetime, and it should be compact for budget and space. But, it has a dc current supply for the solenoid and a rf generator for plasma generation. Usually, they are located on high voltage platform because they are electrically connected with beam extraction power supply. Using permanent magnet solenoid and multi-layer dc break, high voltage deck and high voltage isolation transformer can be eliminated, and the dose rate on targets can be controlled by pulse duty control with semiconductor high voltage switch. Because the beam optics does not change, beam transfer components, such as focusing elements and beam shutter, can be eliminated. It has shown the good performances in budget and space for industrial applications of ion beams.

Cho, Yong-Sub; Kim, Dae-Il; Kim, Han-Sung; Seol, Kyung-Tae; Kwon, Hyeok-Jung; Hong, In-Seok [Proton Engineering Frontier Project, Korea Atomic Energy Research Institute, Daejeon 305-353 (Korea, Republic of)

2012-02-15T23:59:59.000Z

327

What are the Luminous Compact Blue Galaxies?  

E-Print Network [OSTI]

Luminous Compact Blue Galaxies (LCBGs) are common at z~1, contributing significantly to the total star formation rate density. By z~0, they are a factor of ten rarer. While we know that LCBGs evolve rapidly, we do not know what drives their evolution nor into what types of galaxies they evolve. We present the results of a single-dish HI survey of local LCBGs undertaken to address these questions. Our results indicate that LCBGs have M(HI) and M(DYN) consistent with low-mass spirals, but typically exhaust their gas reservoirs in less than 2 Gyr. Overall, the properties of LCBGs are consistent with them evolving into high-mass dwarf elliptical or dwarf irregular galaxies or low-mass, late-type spiral galaxies.

D. J. Pisano; C. A. Garland; R. Guzman; J. Perez Gallego; F. J. Castander; N. Gruel

2007-12-07T23:59:59.000Z

328

Internal Kinematics of Luminous Compact Blue Galaxies  

E-Print Network [OSTI]

We describe the dynamical properties which may be inferred from HST/STIS spectroscopic observations of luminous compact blue galaxies (LCBGs) between 0.1

Matthew A. Bershady; M. Vils; C. Hoyos; R. Guzman; D. C. Koo

2004-11-22T23:59:59.000Z

329

Compact imaging spectrometer utilizing immersed gratings  

DOE Patents [OSTI]

A compact imaging spectrometer with an immersive diffraction grating that compensates optical distortions. The imaging spectrometer comprises an entrance slit for transmitting light, means for receiving the light and directing the light, an immersion grating, and a detector array. The entrance slit, the means for receiving the light, the immersion grating, and the detector array are positioned wherein the entrance slit transmits light to the means for receiving the light and the means for receiving the light directs the light to the immersion grating and the immersion grating receives the light and directs the light to the means for receiving the light, and the means for receiving the light directs the light to the detector array.

Chrisp, Michael P. (Danville, CA); Lerner, Scott A. (Corvallis, OR); Kuzmenko, Paul J. (Livermore, CA); Bennett, Charles L. (Livermore, CA)

2007-07-03T23:59:59.000Z

330

Compact conscious animal positron emission tomography scanner  

DOE Patents [OSTI]

A method of serially transferring annihilation information in a compact positron emission tomography (PET) scanner includes generating a time signal for an event, generating an address signal representing a detecting channel, generating a detector channel signal including the time and address signals, and generating a composite signal including the channel signal and similarly generated signals. The composite signal includes events from detectors in a block and is serially output. An apparatus that serially transfers annihilation information from a block includes time signal generators for detectors in a block and an address and channel signal generator. The PET scanner includes a ring tomograph that mounts onto a portion of an animal, which includes opposing block pairs. Each of the blocks in a block pair includes a scintillator layer, detection array, front-end array, and a serial encoder. The serial encoder includes time signal generators and an address signal and channel signal generator.

Schyler, David J. (Bellport, NY); O'Connor, Paul (Bellport, NY); Woody, Craig (Setauket, NY); Junnarkar, Sachin Shrirang (Sound Beach, NY); Radeka, Veljko (Bellport, NY); Vaska, Paul (Sound Beach, NY); Pratte, Jean-Francois (Stony Brook, NY); Volkow, Nora (Chevy Chase, MD)

2006-10-24T23:59:59.000Z

331

Modeling of interaction between corrosion-induced concrete cover crack and steel corrosion rate.  

E-Print Network [OSTI]

??Chloride-induced corrosion of steel reinforcement in concrete may cause severe damage to RC structures. Longitudinal cover cracks may form during the rust expansion process. Currently,… (more)

Cao, Chong

2012-01-01T23:59:59.000Z

332

E-Print Network 3.0 - asphalt concrete bases Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

other highways, rural roads, or urban streets are asphalt surface Horvath... conducted an LCA of concrete and asphalt pavements based on process flows, including pave- ment...

333

Energy Efficiency Improvement and Cost Saving Oportunities for the Concrete Industry  

E-Print Network [OSTI]

of energy management: energy audits/assessments, energyto Titan America, energy audits conducted in concrete plantsmanagement programs Energy audit Energy teams Employee

Kermeli, Katerina

2013-01-01T23:59:59.000Z

334

Properties and mechanism on flexural fatigue of polypropylene fiber reinforced concrete containing slag  

Science Journals Connector (OSTI)

Properties and mechanism were investigated on flexural fatigue of concrete containing polypropylene fibers and ground granulated blast furnace slag(GGBFS). Four polypropylene fibers’ volume fractions and five ...

Huili Zhang ???; Kanliang Tian

2011-06-01T23:59:59.000Z

335

ERDC/GSLTR-02-4 Rapid Strengthening of Reinforced Concrete  

E-Print Network [OSTI]

of the Army position, unless so designated by other authorized documents. PRINTED ON RECYCLED PAPER #12;ERDC.................................................................................................17 5--FRP/Concrete Connection Tests.......................................................................18 Testing Procedure

Bank, Lawrence C.

336

Emerging Energy-efficiency and CO2 Emission-reduction Technologies for Cement and Concrete Production  

E-Print Network [OSTI]

Looping Technology Description: Amine scrubbing carboncarbon capture using absorption technologies Calera process CO 2 sequestration in concrete curing technology Carbonate looping

Hasanbeigi, Ali

2013-01-01T23:59:59.000Z

337

221-U Facility concrete and reinforcing steel evaluations specification for the canyon disposition initiative (CDI)  

SciTech Connect (OSTI)

This describes a test program to establish the in-situ material properties of the reinforced concrete in Building 221-U for comparison to the original design specifications. Field sampling and laboratory testing of concrete and reinforcing steel structural materials in Building 221-U for design verification will be undertaken. Forty seven samples are to be taken from radiologically clean exterior walls of the canyon. Laboratory testing program includes unconfined compressive strength of concrete cores, tensile strength of reinforcing steel, and petrographic examinations of concrete cores taken from walls below existing grade.

Baxter, J.T.

1998-05-28T23:59:59.000Z

338

Evaluation of concrete structures affected by alkali-silica reaction and delayed ettringite formation.  

E-Print Network [OSTI]

??Alkali-silica reaction (ASR) and delayed ettringite formation (DEF) are expansive reactions that can lead to the premature deterioration of concrete structures. Both have been implicated… (more)

Giannini, Eric Richard

2012-01-01T23:59:59.000Z

339

IMPACT OF ALTERNATIVE CEMENTITIOUS MATERIAL ON THE1 MECHANICAL AND TRANSFER PROPERTIES OF CONCRETE2  

E-Print Network [OSTI]

. The subject of his PhD thesis was the risk of development of Delayed9 Ettringite Formation in concretes. His

340

Nondestructive evaluation of reinforced concrete structures affected by alkali-silica reaction and delayed ettringite formation.  

E-Print Network [OSTI]

??Alkali-silica reaction (ASR) and delayed ettringite formation (DEF) deterioration have been a problem for the concrete infrastructure in the state of Texas and around the… (more)

Kreitman, Kerry Lynn

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Accelerated test methods for evaluating alkali-silica reactivity of recycled concrete aggregates.  

E-Print Network [OSTI]

??This thesis reports the findings of a study carried out to determine the effectiveness of Accelerated Tests in evaluating the Alkali-Silica Reactivity of Recycled Concrete… (more)

Johnson, Robert C (Author)

2011-01-01T23:59:59.000Z

342

Energy Efficiency Improvement and Cost Saving Oportunities for the Concrete Industry  

SciTech Connect (OSTI)

The U.S. concrete industry is the main consumer of U.S.-produced cement. The manufacturing of ready mixed concrete accounts for more than 75% of the U.S. concrete production following the manufacturing of precast concrete and masonry units. The most significant expenditure is the cost of materials accounting for more than 50% of total concrete production costs - cement only accounts for nearly 24%. In 2009, energy costs of the U.S. concrete industry were over $610 million. Hence, energy efficiency improvements along with efficient use of materials without negatively affecting product quality and yield, especially in times of increased fuel and material costs, can significantly reduce production costs and increase competitiveness. The Energy Guide starts with an overview of the U.S. concrete industry’s structure and energy use, a description of the various manufacturing processes, and identification of the major energy consuming areas in the different industry segments. This is followed by a description of general and process related energy- and cost-efficiency measures applicable to the concrete industry. Specific energy and cost savings and a typical payback period are included based on literature and case studies, when available. The Energy Guide intends to provide information on cost reduction opportunities to energy and plant managers in the U.S. concrete industry. Every cost saving opportunity should be assessed carefully prior to implementation in individual plants, as the economics and the potential energy and material savings may differ.

Kermeli, Katerina; Worrell, Ernst; Masanet, Eric

2011-12-01T23:59:59.000Z

343

Impact of Transportation on Cost, Energy and Particulate Emissions for Recycled Concrete Aggregate.  

E-Print Network [OSTI]

??IMPACT OF TRANSPORTATION ON COST, ENERGY AND PARTICULATE EMISSIONS FOR RECYCLED CONCRETE AGGREGATE Transportation distances can have a huge impact on cost, energy, and particulate… (more)

Hameed, Mohamed

2009-01-01T23:59:59.000Z

344

Modelling the mechanical behaviour of pharmaceutical powders during compaction  

E-Print Network [OSTI]

are made of dry powder through a powder compaction process. In the pharmaceutical industry, billionsModelling the mechanical behaviour of pharmaceutical powders during compaction C.-Y. Wua,T, O.M. Ruddyb , A.C. Benthamb , B.C. Hancockc , S.M. Besta , J.A. Elliotta a Pfizer Institute for Pharmaceutical

Elliott, James

345

FUSION RULES FOR REPRESENTATIONS OF COMPACT QUANTUM GROUPS  

E-Print Network [OSTI]

FUSION RULES FOR REPRESENTATIONS OF COMPACT QUANTUM GROUPS TEODOR BANICA Introduction The compact to equivalence) as a sum of irreducible representations a b c + d + e + · · · These formulae are called fusion rules for irreducible representations of G. The fusion semiring R+ (G) is by definition the set

Banica, Teodor

346

Production, Cost, and Soil Compaction Estimates for Two Western Juniper  

E-Print Network [OSTI]

Production, Cost, and Soil Compaction Estimates for Two Western Juniper Extraction Systems, production rates, and soil compaction impacts of two systems for harvesting western juniper (Juniperus, and bucking using a chainsaw and skidding logs with a rubber-tired grapple skidder and a mechanical system

Dodson, Beth

347

Use of Residual Solids from Pulp and Paper Mills for Enhancing Strength and Durability of Ready-Mixed Concrete  

SciTech Connect (OSTI)

This research was conducted to establish mixture proportioning and production technologies for ready-mixed concrete containing pulp and paper mill residual solids and to study technical, economical, and performance benefits of using the residual solids in the concrete. Fibrous residuals generated from pulp and paper mills were used, and concrete mixture proportions and productions technologies were first optimized under controlled laboratory conditions. Based on the mixture proportions established in the laboratory, prototype field concrete mixtures were manufactured at a ready-mixed concrete plant. Afterward, a field construction demonstration was held to demonstrate the production and placement of structural-grade cold-weather-resistant concrete containing residual solids.

Tarun R. Naik; Yoon-moon Chun; Rudolph N. Kraus

2003-09-18T23:59:59.000Z

348

Interstate Oil and Gas Conservation Compact (Multiple States) | Department  

Broader source: Energy.gov (indexed) [DOE]

Interstate Oil and Gas Conservation Compact (Multiple States) Interstate Oil and Gas Conservation Compact (Multiple States) Interstate Oil and Gas Conservation Compact (Multiple States) < Back Eligibility Commercial Developer Industrial Investor-Owned Utility Municipal/Public Utility Utility Program Info State Alabama Program Type Environmental Regulations Provider Interstate Oil and Gas Compact Commission The Interstate Oil and Gas Compact Commission assists member states efficiently maximize oil and natural gas resources through sound regulatory practices while protecting the nation's health, safety and the environment. The Commission serves as the collective voice of member governors on oil and gas issues and advocates states' rights to govern petroleum resources within their borders. The Commission formed the Geological CO2 Sequestration Task Force, which

349

Southwestern Low-Level Radioactive Waste Disposal Compact (South Dakota) |  

Broader source: Energy.gov (indexed) [DOE]

Southwestern Low-Level Radioactive Waste Disposal Compact (South Southwestern Low-Level Radioactive Waste Disposal Compact (South Dakota) Southwestern Low-Level Radioactive Waste Disposal Compact (South Dakota) < Back Eligibility Utility Investor-Owned Utility Industrial Construction Municipal/Public Utility Rural Electric Cooperative Fuel Distributor Program Info State South Dakota Program Type Siting and Permitting Provider Southwestern Low-Level Radioactive Waste Commission This legislation authorizes the state's entrance into the Southwestern Low-Level Radioactive Waste Disposal Compact, which provides for the cooperative management of low-level radioactive waste. The Compact is administered by a commission, which can regulate and impose fees on in-state radioactive waste generators. The states of Arizona, California,

350

COMPACTION OF FIBERBOARD OVERPACK MATERIALS IN A 9975 SHIPPING PACKAGE  

SciTech Connect (OSTI)

Compaction of lower layers in the 9975 fiberboard overpack has been observed in packages that contain excess moisture. Dynamic loading of the package during transportation may also contribute to compaction of the fiberboard. This condition is being tested and analyzed to better understand these compaction mechanisms and provide a basis from which to evaluate their impact to the safety basis for transportation (Safety Analysis Report for Packaging) and storage (facility Design Safety Analysis) at the Savannah River Site (SRS). A test program has been developed and is being implemented to identify the extent of the compaction as a function of fiberboard moisture and typical transport dynamic loadings. Test conditions will be compared to regulatory requirements for dynamic loading. Characterization of the recovery of short-term compaction following the application of dynamic loading is also being evaluated. Interim results from this test program will be summarized.

Stefek, T.; Daugherty, W.; Estochen, E.; Murphy, J.

2010-05-27T23:59:59.000Z

351

Perceptions of compact fluorescent lamps in the residential market  

SciTech Connect (OSTI)

Compact fluorescent lamps offer significant energy savings over other forms of residential lighting and last up to 10 times longer than conventional incandescent bulbs. In order to better understand existing barriers to acceptance and future opportunities for growth of compact fluorescent lighting in the residential retrofit sector, a three stage research project was designed and conducted by MACRO Consulting, Inc. Assessment of whether or not the benefits of compact fluorescent lamps are sufficient to overcome price resistance was one of the major purposes of this project. Residential customers were interviewed in focus group sessions to help determine key issues and motivating forces in the lighting/energy saving/cost saving equation. Residential customers in 5 major market areas were contacted by telephone, and data about their awareness, knowledge and use of compact fluorescent lighting were collected. These customers also participated in an attribute rating exercise in which compact fluorescent lamps were compared with fluorescent tubes and incandescent bulbs on a series of product attributes. A price elasticity exercise was also conducted. Teleconferences with retailers of compact fluorescent lamps were conducted in order to explore their knowledge of and attitudes towards compact fluorescent lamps. Customers agree that energy savings and longer life are both positive attributes for residential lighting products, but they are not yet ready to make the switch away from inexpensive, versatile and readily available incandescent bulbs to compact fluorescent lamps. Compact fluorescent lamps are rated poorly (even by satisfied'' users) on each of seven positive attributes of home lighting. Major barriers to increased use of compact fluorescent lamps include price, convenience, and performance. Prices above $10 are considered outrageous''. Product improvements are needed for appearance, light output and versatility.

Weiner, J.; Campbell, C.J. (Macro Consulting, Inc., Mountain View, CA (United States))

1992-07-01T23:59:59.000Z

352

CONCRETE REFLECTED ARRAYS OF U(93.2) METAL  

SciTech Connect (OSTI)

During the period from 1963 – 1973, experiments involving highly enriched uranium units were performed at the Oak Ridge National Laboratory Critical Experiments Facility to determine various critical configurations of three-dimensional arrays. The experiments formed a four-part series, and were reported by several different experimenters; the results of interest for this evaluation are those reported for the fourth experimentation, Critical Three-Dimensional Arrays of Neutron Interacting Units: Part IV, published and performed by D.W.Magnuson (Ref 1). Information is also available in the logbook . This set of experiments utilized subcritical metal units on a split table apparatus to determine critical configurations for 2×2×2 arrangements of highly enriched uranium reflected by concrete. Magnuson manipulated the configuration of several uranium cylinders and blocks within a concrete reflector. The different permutations utilized uranium cylinders of two different heights in various positions in the three dimensional array; certain cases also placed thin uranium blocks on top of the cylinders. The thickness of the surrounding concrete, as well as the inner dimensions of the concrete reflector was also varied in certain cases. The variations resulted in fourteen different experimental permutations or configurations. All fourteen configurations were judged to be unacceptable for use as criticality safety benchmarks. All experiments were initially evaluated; however only three configurations were evaluated in detail. Configurations 2, 4, 6 and 12 were not evaluated in detail because they are subcritical and configurations 5, 7, 8, 9, and 10 were also were not evaluated in detail because they were supercritical by more than beta effective (~0.007), or prompt critical. The experiments evaluated in detail for this benchmark were configurations 1, 3, and 11. The experimental report also contains the information for HEU-MET-FAST-056. Closely related work has been recorded in HEU-MET-FAST-053, which is a benchmark evaluation of a different series of three dimensional array experiments with four different moderator materials. HEU-MET-FAST-023 and HEU-MET-FAST-026 are also related because they utilize the same metal cylinders as these experiments.

Mackenzie Gorham; John D. Bess; J. Blair Briggs; Virginia Dean; Davis Reed

2010-09-01T23:59:59.000Z

353

Predicting the fatigue life of asphalt concrete overlay systems  

E-Print Network [OSTI]

will simply be the da dN "y-intercept" and n is the slope of the curve. From the procedure listed above Saraf found the parameter A to be affected by the viscosity of the asphalt binder used in the mix, a decrease in viscosity gave an increase in A...PREDICTING THE FATIGUE LIFE OF ASPHALT CONCRETE OVERLAY SYSTEMS A Thesis by FREDERICK PHILIP GERMANN Submitted to the Graduate College of Texas A&M University in Partial fulfillment of the requirement for the degree of MASTER OF SCIENCE May...

Germann, Frederick P

1979-01-01T23:59:59.000Z

354

Toughness of composite steel-concrete structure of sandwich system  

SciTech Connect (OSTI)

Offshore structure should have a high degree of structural safety not only under normal conditions but also extreme conditions even under collision loadings. The authors carried out both experimental and theoretical investigations on the toughness of the sandwich composite structures. Experiments were carried out for the two-dimensional models of composite structures under pure bending and combined shear and bending as well. A nonlinear analysis was developed to predict the toughness of sandwich beam under pure bending. In the analysis the material nonlinearity of both concrete and steel plate were taken into consideration. The analysis were found to be very close to the experimental results.

Iwata, Setsuo [Hitachi Zosen Corp., Osaka (Japan); Hattori, Yoichi [Kanazawa Inst. of Tech. (Japan)

1994-12-31T23:59:59.000Z

355

Development of a low-profile portable concrete barrier  

E-Print Network [OSTI]

A low-profile portable concrete barrier (PCB) has been developed for use in low-speed (approximately 45 mph [73 km/h] or less) work zones. The purpose of the low-profile barrier is to shield the work zone and redirect errant vehicles while.... SEQUENTIAL PHOTOGRAPHS OF CRASH TESTS APPENDIX D. ACCELEROMETER TRACES AND PLOTS OF ROLL, PITCH AND YAW RATES APPENDIX E. TEST VEHICLE PROPERTIES VITA Page 6 8 8 10 10 13 13 17 18 19 20 24 29 29 41 50 52 53 63 68 73 82 85 LIST...

Guidry, Todd Randall

2012-06-07T23:59:59.000Z

356

Process for forming coal compacts and product thereof  

DOE Patents [OSTI]

A process for forming durable, mechanically strong compacts from coal particulates without use of a binder is disclosed. The process involves applying a compressive stress to a particulate feed comprising substantially water-saturated coal particles while the feed is heated to a final compaction temperature in excess of about 100.degree. C. The water present in the feed remains substantially in the liquid phase throughout the compact forming process. This is achieved by heating and compressing the particulate feed and cooling the formed compact at a pressure sufficient to prevent water present in the feed from boiling. The compacts produced by the process have a moisture content near their water saturation point. As a result, these compacts absorb little water and retain exceptional mechanical strength when immersed in high pressure water. The process can be used to form large, cylindrically-shaped compacts from coal particles (i.e., "coal logs") so that the coal can be transported in a hydraulic coal log pipeline.

Gunnink, Brett (Columbia, MO); Kanunar, Jayanth (Arlington, MA); Liang, Zhuoxiong (San Francisco, CA)

2002-01-01T23:59:59.000Z

357

COMPACTION OF FIBERBOARD IN A 9975 SHIPPING PACKAGE  

SciTech Connect (OSTI)

Compaction of lower layers in the fiberboard overpack has been observed in 9975 packages that contain elevated moisture. Lab testing has resulted in a better understanding of (1) the relationship between the fiberboard moisture level and compaction of the lower fiberboard assembly, and (2) the behavior of the fiberboard during transport. In laboratory tests, higher moisture content has been shown to correspond to higher total compaction of fiberboard material, greater rate of compaction, and continued compaction over a longer period of time. In addition, laboratory tests have shown that the application of a dynamic load results in higher fiberboard compaction. The test conditions and sample geometric/loading configurations were chosen to simulate the regulatory requirements for 9975 package input dynamic loading. Dynamic testing was conducted over a period of several months to acquire immediate and cumulative changes in geometric data for various moisture levels. Currently, one sample set has undergone a complete dynamic test regimen, while testing of another set is still in-progress. The dynamic input, data acquisition, test effects on sample dynamic parameters, and interim results from this test program will be summarized and compared to regulatory specifications for dynamic loading. This will provide a basis from which to evaluate the impact of moisture and fiberboard compaction on the safety basis for transportation (Safety Analysis Report for Packaging) and storage (facility Documented Safety Analysis) at the Savannah River Site (SRS).

Stefek, T.; Daugherty, W.; Estochen, E.; Leduc, D.

2011-05-11T23:59:59.000Z

358

MACHO (MAssive Compact Halo Objects) Data  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The primary aim of the MACHO Project is to test the hypothesis that a significant fraction of the dark matter in the halo of the Milky Way is made up of objects like brown dwarfs or planets: these objects have come to be known as MACHOs, for MAssive Compact Halo Objects. The signature of these objects is the occasional amplification of the light from extragalactic stars by the gravitational lens effect. The amplification can be large, but events are extremely rare: it is necessary to monitor photometrically several million stars for a period of years in order to obtain a useful detection rate. For this purpose MACHO has a two channel system that employs eight CCDs, mounted on the 50 inch telescope at Mt. Stromlo. The high data rate (several GBytes per night) is accommodated by custom electronics and on-line data reduction. The Project has taken more than 27,000 images with this system since June 1992. Analysis of a subset of these data has yielded databases containing light curves in two colors for 8 million stars in the LMC and 10 million in the bulge of the Milky Way. A search for microlensing has turned up four candidates toward the Large Magellanic Cloud and 45 toward the Galactic Bulge. The web page for data provides links to MACHO Project data portals and various specialized interfaces for viewing or searching the data. (Specialized Interface)

359

Development and Construction of Low-Cracking High-Performance Concrete (LC-HPC) Bridge Decks: Free Shrinkage, Mixture Optimization, and Concrete Production  

E-Print Network [OSTI]

parts covering (1) the development of an aggregate optimization and concrete mixture design program entitled KU Mix, (2) free-shrinkage tests to evaluate potential LC-HPC mixtures developed for use in bridge decks, and (3) the construction...

Lindquist, Will David

2008-01-01T23:59:59.000Z

360

Axisymmetric analysis of a 1:6-scale reinforced concrete containment building using a distributed cracking model for the concrete  

SciTech Connect (OSTI)

Results of axisymmetric structural analyses of a 1:6 scale model of a reinforced concrete nuclear containment building are presented. Both a finite element shell analysis and a simplified membrane analysis were made to predict the structural response and ultimate pressure capacity of the model. Analytical results indicate that the model will fail at an internal pressure of 187 psig when the stress level in the hoop reinforcement at the midsection of the cylinder exceeds the ultimate strength of the bar splices. 5 refs., 34 figs., 6 tabs.

Weatherby, J.R.

1987-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Low Wind Speed Technology Phase I: Evaluation of Design and Construction Approaches for Economical Hybrid Steel/Concrete Wind Turbine Towers; BERGER/ABAM Engineers Inc.  

SciTech Connect (OSTI)

This fact sheet describes a subcontract with BERGER/ABAM Engineers Inc. to study the economic feasibility of concrete and hybrid concrete/steel wind turbine towers.

Not Available

2006-03-01T23:59:59.000Z

362

Project Profile: Development and Performance Evaluation of High Temperature Concrete for Thermal Energy Storage for Solar Power Generation  

Broader source: Energy.gov [DOE]

The University of Arkansas, under the Thermal Storage FOA, is developing a novel concrete material that can withstand operating temperatures of 500°C or more and is measuring the concrete properties.

363

Recycling process water in ready-mixed concrete operations. Final report, 1 September 1997--31 December 1998  

SciTech Connect (OSTI)

The objective of this study was to investigate water quality standards and the possibility of reusing concrete wastewater as aggregated irrigation and/or batch mixing water in the production of fresh concrete.

Chini, A.R.; Muszynski, L.C.; Ellis, B.S.

1999-02-22T23:59:59.000Z

364

A Review of Emerging Energy-efficiency and CO2 Emission-reduction Technologies for Cement and Concrete Production  

E-Print Network [OSTI]

Fly Ash Concrete. 2005 World of Coal Ash (WOCA), Lexington,Concrete. 2011 World of Coal Ash (WOCA) Conference – May 9-Materials Fly ash is a byproduct of coal burning that can

Hasanbeigi, Ali

2014-01-01T23:59:59.000Z

365

AN INVESTIGATION OF THE BONDING AT THE CONCRETE POLYMER COMPOSITE INTERFACE  

E-Print Network [OSTI]

AN INVESTIGATION OF THE BONDING AT THE CONCRETE POLYMER COMPOSITE INTERFACE Wai How Soong, S, USA. ABSTRACT Bonding between the concrete and polymer composite (reinforcement) tendon was studied) and surface roughness of composite reinforcement tendons on the two types of bond strengths were investigated

366

Paper Number 05 Structural Fuses and Concrete-Filled Steel Shapes for  

E-Print Network [OSTI]

Paper Number 05 Structural Fuses and Concrete-Filled Steel Shapes for Seismic- and Multi-hazard design concepts. This paper presents recent research on structural fuses and concrete-filled steel shapes composite rectangular columns of Bi-Steel panels. Experimental results from another series of tests

Bruneau, Michel

367

Influence of weather and global warming in chloride ingress into concrete: a stochastic approach  

E-Print Network [OSTI]

Influence of weather and global warming in chloride ingress into concrete: a stochastic approach E the influence of weather conditions and global warming on chloride ingress into concrete. The assessment including seasonal variations and global warming is also proposed in this work. Three scenarios of global

Paris-Sud XI, Université de

368

Dual Coding Theory and Chinese: Recall of Concrete and Abstract Sentences in Chinese-English Bilinguals  

E-Print Network [OSTI]

variable showed that significant main effects were found for languages, F (1, 76) =11.68, p = .001, n2 = .13, and for concreteness, F (1, 76) = 38.12, p < .001, n2 = 33. That is, Chinese was overall recalled significantly better than English, and concrete...

Chen, Tsuei-Fen

2010-10-12T23:59:59.000Z

369

Study of critical behavior in concrete during curing by application of dynamic linear and nonlinear means  

E-Print Network [OSTI]

a phase change, a critical behavior, from the liquid to solid state. The hardening of concrete causedStudy of critical behavior in concrete during curing by application of dynamic linear and nonlinear behavior, both compressional and shear waves are used in wide band pulse echo mode. Through the value

370

Does the Addition of Fly Ash to Concrete Present a Radon Hazard? J. A. Siegel1  

E-Print Network [OSTI]

Street, Suite 450, Austin, Texas, 78701, USA Summary: Fly ash, a waste material from coal-fired power of fly ash [9]. Fly ash is a waste material from coal fired power plants; when added to concrete, fly ashDoes the Addition of Fly Ash to Concrete Present a Radon Hazard? J. A. Siegel1 , M. Juenger1 and J

Siegel, Jeffrey

371

Properties of concrete incorporating high volumes of ASTM Class F fly ash  

E-Print Network [OSTI]

This thesis presents the results of research performed in developing high-volume fly ash (HVFA) concrete incorporating ASTM Type I cement and ASTM Class F fly ash from Big Brown Power Plant of TU Electric, Texas. In HVFA concrete, the proportion...

Li, Wei Tung

1995-01-01T23:59:59.000Z

372

Sustainable Use of Resources Recycling of Sewage Treatment Plant Water in Concrete  

E-Print Network [OSTI]

industries have the environmental and societal responsibility to contribute to sustainable development. The concrete industry is a significant contributor to air pollution and also a consumer of vast quantities widely used construction material in the world. Production of portland cement used in concrete produces

Wisconsin-Milwaukee, University of

373

Effect of coating on the hygric performance of a hemp concrete wall Yacine At Oumziane 1  

E-Print Network [OSTI]

concrete, coating ABSTRACT Constructions built with environmentally friendly materials like hemp concrete know currently a real development thanks to their low environmental impact and their interesting thermo In the context of sustainable development, one of the concerns in building construction is the choice

Boyer, Edmond

374

A PERMEABLE ACTIVE AMENDMENT CONCRETE (PAAC) FOR CONTAMINANT REMEDIATION AND EROSION CONTROL  

SciTech Connect (OSTI)

The final project report for SEED SERDP ER - 2134 describes the development of permeable active amendment concrete (PAAC), which was evaluated through four tasks: 1) development of PAAC; 2) assessment of PAAC for contaminant removal; 3) evaluation of promising PAAC formulations for potential environmental impacts; and 4) assessment of the hydraulic, physical, and structural properties of PAAC. Conventional permeable concrete (often referred to as pervious concrete) is concrete with high porosity as a result of an extensive and interconnected void content. It is made from carefully controlled amounts of water and cementitious materials used to create a paste that forms a coating around aggregate particles. The mixture has a substantial void content (e.g., 15% - 25%) that results in a highly permeable structure that drains quickly. In PAAC, the aggregate material is partly replaced by chemically-active amendments that precipitate or adsorb contaminants in water that flows through the concrete interstices. PAAC combines the relatively high structural strength, ample void space, and water permeability of pervious concrete with the contaminant sequestration ability of chemically-active amendments to produce a new material with superior durability and ability to control contaminant mobility. The high surface area provided by the concrete interstices in PAAC provides significant opportunity for contaminants to react with the amendments incorporated into the concrete matrix. PAAC has the potential to immobilize a large variety of organic and inorganic contaminants by incorporating different active sequestering agents including phosphate materials (rock phosphate), organoclays, zeolite, and lime individually or in combinations.

Knox, A.; Paller, M.; Dixon, K.

2012-06-29T23:59:59.000Z

375

A new concept for the contact at the interface of steel-concrete composite beams  

E-Print Network [OSTI]

A new concept for the contact at the interface of steel-concrete composite beams Samy GUEZOULI of contact at the interface of steel-concrete composite beams. The F.E. model "Pontmixte", able to study continuous composite beams at real scale, was based on a finite element of composite beam which considers

Boyer, Edmond

376

HYGROTHERMAL BEHAVIOUR OF A HEMP CONCRETE WALL: INFLUENCE OF SORPTION MODELLING  

E-Print Network [OSTI]

HYGROTHERMAL BEHAVIOUR OF A HEMP CONCRETE WALL: INFLUENCE OF SORPTION MODELLING Yacine Aït-LGCGM, France KEYWORDS: transient HAM model, hemp concrete, porous media, sorption SUMMARY: Constructions built for sorption isotherm modelling.. 1. Introduction In the context of sustainable development, one

Boyer, Edmond

377

From mind to matter: neural correlates of abstract and concrete mindsets  

E-Print Network [OSTI]

From mind to matter: neural correlates of abstract and concrete mindsets Michael Gilead,1 Nira Scopus, Jerusalem 91905, Israel Much work in the field of social cognition shows that adopting an abstract (vs concrete) mindset alters the way people construe the world, thereby exerting substantial

Anat, Maril,

378

Anisotropic damage modelling of biaxial behaviour and rupture of concrete structures  

E-Print Network [OSTI]

Continuum Damage Mechanics at the Representative Element Volume scale is a relevant tool to deal with largeAnisotropic damage modelling of biaxial behaviour and rupture of concrete structures Ragueneau F with damage induced anisotropy modelling for concrete-like materials. A thermodynamics based constitutive

Boyer, Edmond

379

Southern States Energy Compact (Multiple States) | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Southern States Energy Compact (Multiple States) Southern States Energy Compact (Multiple States) Southern States Energy Compact (Multiple States) < Back Eligibility Agricultural Commercial Construction Developer Fed. Government Fuel Distributor General Public/Consumer Industrial Installer/Contractor Institutional Investor-Owned Utility Local Government Low-Income Residential Multi-Family Residential Municipal/Public Utility Nonprofit Residential Retail Supplier Rural Electric Cooperative Schools State/Provincial Govt Systems Integrator Transportation Tribal Government Utility Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State Alabama Program Type Environmental Regulations Industry Recruitment/Support Provider Southern States Energy Board

380

Iron-carbon compacts and process for making them  

DOE Patents [OSTI]

The present invention includes iron-carbon compacts and a process for making them. The process includes preparing a slurry comprising iron powder, furfuryl alcohol, and a polymerization catalyst for initiating the polymerization of the furfuryl alcohol into a resin, and heating the slurry to convert the alcohol into the resin. The resulting mixture is pressed into a green body and heated to form the iron-carbon compact. The compact can be used as, or machined into, a magnetic flux concentrator for an induction heating apparatus.

Sheinberg, Haskell (Santa Fe, NM)

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Area theorem and smoothness of compact Cauchy horizons  

E-Print Network [OSTI]

We obtain an improved version of the area theorem for not necessarily differentiable horizons which, in conjunction with a recent result on the completeness of generators, allows us to prove that under the null energy condition every compactly generated Cauchy horizon is smooth and compact. We explore the consequences of this result for time machines, topology change, black holes and cosmic censorship. For instance, it is shown that compact Cauchy horizons cannot form in a non-empty spacetime which satisfies the stable dominant energy condition wherever there is some source content.

E. Minguzzi

2014-06-23T23:59:59.000Z

382

Area theorem and smoothness of compact Cauchy horizons  

E-Print Network [OSTI]

We obtain an improved version of the area theorem for not necessarily differentiable horizons which, in conjunction with a recent result on the completeness of generators, allows us to prove that under the null energy condition every compactly generated Cauchy horizon is smooth and compact. We explore the consequences of this result for time machines, topology change, black holes and cosmic censorship. For instance, it is shown that compact Cauchy horizons cannot form in a non-empty spacetime which satisfies the stable dominant energy condition wherever there is some source content.

Minguzzi, E

2014-01-01T23:59:59.000Z

383

Compaction of wood chips - physical and pulping characteristics  

SciTech Connect (OSTI)

The temperatures of the uncompacted chips of Pinus taeda were, in general, higher than those of compacted chips when stored outdoors in containers for 236 days. The results of the study after storage indicated that the moisture content (MC) of compacted chips is the same as that of green chips, the uncompacted equivalent mass of chips exhibits a substantial loss in MC, and there is approximately 18% increase in MC of the uncompacted chips simulating a stockpile when compared with MC of green chips. The compaction process neither damaged wood fibers nor altered the chip response to conventional pulping.

Hassan, A.E.; Reeves, R.H.

1980-01-01T23:59:59.000Z

384

Compact Stars in low-mass X-ray binaries  

E-Print Network [OSTI]

We propose a model for compact stars in low-mass X-ray binaries(LMXBs) namely KS 1731-260, EXO 1745-248 and 4U 1608-52. Here we investigate the physical phenomena of a compact star in the LMXBs. Using our model, we have calculated central density, surface density, mass(M) and red-shift for the above mentioned compact stars, which is very much consistent with the reported data. We also obtain the possible equation of state(EOS) of the stars which is physically acceptable.

Sk. Monowar Hossein; Sajahan Molla; Md. Abdul Kayum Jafry; Mehedi Kalam

2014-08-13T23:59:59.000Z

385

HIGH-DENSITY CONCRETE WITH CERAMIC AGGREGATE BASED ON DEPLETED URANIUM DIOXIDE  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

DENSITY CONCRETE WITH CERAMIC AGGREGATE BASED ON DEPLETED URANIUM DENSITY CONCRETE WITH CERAMIC AGGREGATE BASED ON DEPLETED URANIUM DIOXIDE S.G. Ermichev, V.I. Shapovalov, N.V.Sviridov (RFNC-VNIIEF, Sarov, Russia) V.K. Orlov, V.M. Sergeev, A. G. Semyenov, A.M. Visik, A.A. Maslov, A. V. Demin, D.D. Petrov, V.V. Noskov, V. I. Sorokin, O. I. Uferov (VNIINM, Moscow, Russia) L. Dole (ORNL, Oak Ridge, USA) Abstract - Russia is researching the production and testing of concretes with ceramic aggregate based on depleted uranium dioxide (UO 2 ). These DU concretes are to be used as structural and radiation-shielded material for casks for A-plant spent nuclear fuel transportation and storage. This paper presents the results of studies aimed at selection of ceramics and concrete composition, justification of their production technology, investigation of mechanical properties, and chemical stability.

386

Lightweight concrete materials and structural systems for water tanks for thermal storage. Final report  

SciTech Connect (OSTI)

Thermally efficient hot water storage tanks were designed, fabricated and evaluated. The tanks were made using cellular concrete at a nominal density of 100 lb/ft/sup 3/ for the structural elements and at a 30 lb/ft/sup 3/ density for the insulating elements. Thermal performance testing of the tanks was done using a static decay test since the test procedure specified in ASHRAE 94-77 was not experimentally practical. A series of composition modifications to the cellular concrete mix were investigated and the addition of alkaline resistant glass fibers was found to enhance the mechanical properties at no sacrifice in thermal behavior. Economic analysis indicated that cellular concrete provides a cost-effective insulating material. The total portability of the plant for producing cellular concrete makes cellular concrete amenable to on-site fabrication and uniquely adaptable to retrofit applications.

Buckman, R.W. Jr.; Elia, G.G.; Ichikawa, Y.

1980-12-01T23:59:59.000Z

387

Effects of the air–steam mixture on the permeability of damaged concrete  

SciTech Connect (OSTI)

Massive concrete structures such as the containments of nuclear power plant must maintain their tightness at any circumstances to prevent the escape of radioactive fission products into the environment. In the event of an accident like a Loss of Coolant Accident (LOCA), the concrete wall is submitted to both hydric and mechanical loadings. A new experimental device reproducing these extreme conditions (water vapor transfer, 140 °C and 5 bars) is developed in the GeM Laboratory to determine the effect of the saturation degree, the mechanical loading and the flowing fluid type on the concrete transfer properties. The experimental tests show that the previous parameters significantly affect the concrete permeability and the gas leakage rate. Their evolution as a function of the mechanical loading is characterized by two phases that are directly related to concrete microstructure and crack development.

Medjigbodo, Sonagnon [LUNAM Université, Institut de Recherche en Génie Civil et Mécanique (GeM UMR CNRS 6183), Centrale Nantes, 1 rue de la Noe, BP 92101, F-44321 CEDEX 3 Nantes (France)] [LUNAM Université, Institut de Recherche en Génie Civil et Mécanique (GeM UMR CNRS 6183), Centrale Nantes, 1 rue de la Noe, BP 92101, F-44321 CEDEX 3 Nantes (France); Darquennes, Aveline [LMT/ENS Cachan/CNRS UMR 8535/UPMC/PRES Université Sud Paris, Cachan (France)] [LMT/ENS Cachan/CNRS UMR 8535/UPMC/PRES Université Sud Paris, Cachan (France); Aubernon, Corentin [LUNAM Université, Institut de Recherche en Génie Civil et Mécanique (GeM UMR CNRS 6183), Centrale Nantes, 1 rue de la Noe, BP 92101, F-44321 CEDEX 3 Nantes (France)] [LUNAM Université, Institut de Recherche en Génie Civil et Mécanique (GeM UMR CNRS 6183), Centrale Nantes, 1 rue de la Noe, BP 92101, F-44321 CEDEX 3 Nantes (France); Khelidj, Abdelhafid [LUNAM Université, Institut de Recherche en Génie Civil et Mécanique (GeM UMR CNRS 6183), IUT de Saint Nazaire, 58 rue Michel Ange, BP 420 Heinlex, F-44600 Saint-Nazaire (France)] [LUNAM Université, Institut de Recherche en Génie Civil et Mécanique (GeM UMR CNRS 6183), IUT de Saint Nazaire, 58 rue Michel Ange, BP 420 Heinlex, F-44600 Saint-Nazaire (France); Loukili, Ahmed, E-mail: ahmed.loukili@ec-nantes.fr [LUNAM Université, Institut de Recherche en Génie Civil et Mécanique (GeM UMR CNRS 6183), Centrale Nantes, 1 rue de la Noe, BP 92101, F-44321 CEDEX 3 Nantes (France)] [LUNAM Université, Institut de Recherche en Génie Civil et Mécanique (GeM UMR CNRS 6183), Centrale Nantes, 1 rue de la Noe, BP 92101, F-44321 CEDEX 3 Nantes (France)

2013-12-15T23:59:59.000Z

388

Measurement of concrete E-modulus evolution since casting: A novel method based on ambient vibration  

SciTech Connect (OSTI)

The use of ambient vibration tests to characterize the evolution of E-modulus of concrete right after casting is investigated in this paper. A new methodology is proposed, which starts by casting a concrete cylindrical beam inside a hollow acrylic formwork. This beam is then placed horizontally, simply supported at both extremities, and vertical accelerations resulting from ambient vibration are measured at mid-span. Processing these mid-span acceleration time series using power spectral density functions allows a continuous identification of the first flexural frequency of vibration of the composite beam, which in turn is correlated with the evolutive E-modulus of concrete since casting. Together with experiments conducted with the proposed methodology, a complementary validation campaign for concrete E-modulus determination was undertaken by static loading tests performed on the composite beam, as well as by standard compressive tests of concrete cylinders of the same batch loaded at different ages.

Azenha, Miguel, E-mail: miguel.azenha@civil.uminho.p [LABEST - Laboratory for the Concrete Technology and Structural Behaviour, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto (Portugal); ISISE - Institute for Sustainability and Innovation in Structural Engineering, Universidade do Minho, Escola de Engenharia, Campus de Azurem, 4800-058 Guimaraes (Portugal); Magalhaes, Filipe [VIBEST - Laboratory of Vibrations and Structural Monitoring, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto (Portugal); Faria, Rui [LABEST - Laboratory for the Concrete Technology and Structural Behaviour, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto (Portugal); Cunha, Alvaro [VIBEST - Laboratory of Vibrations and Structural Monitoring, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto (Portugal)

2010-07-15T23:59:59.000Z

389

Fiber reinforcement of asphalt concrete using cow manure  

E-Print Network [OSTI]

to ASTM Designation: D 1075 -54 (Reapproved 1974) and another for Hveem and Marshall tests heating the specimens in water, the properties of which were the control properties for water suscepti- bility tests. Tes ting of Specimens Each compacted test... specimen prepared in accordance with the Marshall Method of Mixture Design was subjected to the fol owing 12 1 tests and analysis. (1) Bulk Specific Gravity according to ASTM Designation: D 2726- 14 73. In this test the specimen was weighed in air...

Bakar, Mohammed Abu

2012-06-07T23:59:59.000Z

390

Compact imaging Bragg spectrometer for fusion devices  

SciTech Connect (OSTI)

A compact imaging x-ray spectrometer has been designed for tokamaks and stellarators to measure the plasma parameters at different spatial chords. It has been optimized for high spectral resolution and high sensitivity. High spectral resolution is obtained by using solid state detectors and minimizing the imaging errors of the spherical crystals. It is shown, that using spherical crystals the solid angle and hence the throughput can be increased significantly, without compromising the spectral resolution. The design is useful for the measurement of the spectra of He- and H-like ions from Si to Kr. The spectral resolution is sufficient for the measurement of plasma parameters. The temporal resolution is high enough for transport studies by gas puff and laser ablation experiments. The design is based on a modified Johann spectrometer mount, utilizing a spherically bent crystal instead of the cylindrically bent crystal in the traditional Johann mount. The astigmatism of the wavelength selective reflection on the spherical crystal is applied to obtain imaging of an extended plasma source on a two-dimensional detector. For each element, a separate crystal is required, only in few cases, a crystal can be used for the spectra of two elements. For the spectra of most of the He-like ions from Si up to Kr, suitable crystal cuts have been found on quartz, silicon and germanium crystals with Bragg angles in a small interval around the design value of 53.5 deg. All of the crystals have the same radius. They are fixed on a rotational table. The distance to the detector is adjusted by an x-y table to fit to the Rowland circle.

Bertschinger, G.; Biel, W.; Jaegers, H.; Marchuk, O. [Institute of Plasma Physics, Forschungszentrum Juelich GmbH, EURATOM Association, Trilateral Euregio Cluster, D-52425 Juelich (Germany)

2004-10-01T23:59:59.000Z

391

Yellowstone River Compact (North Dakota) | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Yellowstone River Compact (North Dakota) Yellowstone River Compact (North Dakota) Yellowstone River Compact (North Dakota) < Back Eligibility Utility Fed. Government Commercial Agricultural Investor-Owned Utility State/Provincial Govt Industrial Construction Municipal/Public Utility Local Government Residential Installer/Contractor Rural Electric Cooperative Tribal Government Low-Income Residential Schools Retail Supplier Institutional Multi-Family Residential Systems Integrator Fuel Distributor Nonprofit General Public/Consumer Transportation Savings Category Water Buying & Making Electricity Program Info State North Dakota Program Type Siting and Permitting The Yellowstone River Compact, agreed to by the States of Montana, North Dakota, and Wyoming, provides for an equitable division and apportionment of the waters of the Yellowstone River, as well as for the conservation,

392

Lighting the Way with Compact Fluorescent Lighting | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Lighting the Way with Compact Fluorescent Lighting Lighting the Way with Compact Fluorescent Lighting Lighting the Way with Compact Fluorescent Lighting April 28, 2009 - 5:00am Addthis John Lippert There is a major push today to get homeowners to adopt compact fluorescent lamp (CFL) light bulbs. They have been on the market for nearly three decades, and many homeowners still do not use them widely. But the tide is definitely turning. Their availability and the percentage of homeowners familiar with the technology and purchasing them for their homes have been steadily rising. The products have improved considerably compared to early products, and their prices have plummeted. The ENERGY STAR® Change a Light, Change the World Campaign has been running now for more than half a dozen years. This campaign is designed to

393

Covered Product Category: Compact Fluorescent Lamps | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Covered Product Category: Compact Fluorescent Lamps Covered Product Category: Compact Fluorescent Lamps Covered Product Category: Compact Fluorescent Lamps October 7, 2013 - 10:48am Addthis ENERGY STAR Qualified Products Federal Energy Management Program (FEMP) provides acquisition guidance across a variety of product categories, including compact fluorescent lamps (CFLs), which are an ENERGY STAR-qualified product category. Federal laws and executive orders mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law. Most manufacturers display the ENERGY STAR label on complying models. For a model not displaying this label, check the manufacturer's literature to determine if it meets the efficiency requirements outlined by ENERGY STAR.

394

Toward a compact underwater structured light 3-D imaging system  

E-Print Network [OSTI]

A compact underwater 3-D imaging system based on the principles of structured light was created for classroom demonstration and laboratory research purposes. The 3-D scanner design was based on research by the Hackengineer ...

Dawson, Geoffrey E

2013-01-01T23:59:59.000Z

395

Codings of separable compact subsets of the first Baire class  

E-Print Network [OSTI]

Let $X$ be a Polish space and $K$ a separable compact subset of the first Baire class on $X$. For every sequence $\\bs$ dense in $\\kk$, the descriptive set-theoretic properties of the set \\[ \\lbf=\\{L\\in[\

Dodos, Pandelis

2008-01-01T23:59:59.000Z

396

Compact Cross-Dipole Sonic (CXD) | Open Energy Information  

Open Energy Info (EERE)

CXD) Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Compact Cross-Dipole Sonic (CXD) Author Weatherford Published Publisher Not Provided, 2010 DOI Not...

397

COMPACTNESS OF COMPOSITION OPERATORS ON BMOA Wayne Smith  

E-Print Network [OSTI]

COMPACTNESS OF COMPOSITION OPERATORS ON BMOA Wayne Smith Abstract. A function theoretic;2 WAYNE SMITH for all functions in the unit ball of BMOA; see Theorem 3.1 in [BCM]. M. Tjani [Tj, Theorem

Smith, Wayne

398

Mechanisms of compaction of quartz sand at diagenetic conditions  

E-Print Network [OSTI]

reserved. Keywords: compaction; subcritical crack growth; pressure solution; diagenesis; microstructures- nisms of subcritical crack growth and pressure solution (stress or strain induced dissolution, dif rate at long times under wet conditions reflect an increase in the contribution of subcritical cracking

Chester, Frederick M.

399

Lighting the Way with Compact Fluorescent Lighting | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Lighting the Way with Compact Fluorescent Lighting Lighting the Way with Compact Fluorescent Lighting Lighting the Way with Compact Fluorescent Lighting April 28, 2009 - 5:00am Addthis John Lippert There is a major push today to get homeowners to adopt compact fluorescent lamp (CFL) light bulbs. They have been on the market for nearly three decades, and many homeowners still do not use them widely. But the tide is definitely turning. Their availability and the percentage of homeowners familiar with the technology and purchasing them for their homes have been steadily rising. The products have improved considerably compared to early products, and their prices have plummeted. The ENERGY STAR® Change a Light, Change the World Campaign has been running now for more than half a dozen years. This campaign is designed to

400

Phase Transition in Compact QED(3) and the Josephson Junction  

E-Print Network [OSTI]

We study the finite temperature phase transition in 2+1 dimensional compact QED and its dual theory: Josephson junction. Duality of these theories at zero temperature was established long time ago by Hosotani. Phase transition in compact QED is well studied and we employ the `duality' to study the superconductivity phase transition in a Josephson junction. For a thick junction we obtain a critical temperature in terms of the geometrical properties of the junction.

Vakif K. Onemli; Murat Tas; Bayram Tekin

2001-08-22T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Compact Groups of Galaxies in the Las Campanas Redshift Survey  

E-Print Network [OSTI]

We have recently extracted a catalog of compact groups of galaxies (CGs) from the Las Campanas Redshift Survey. This catalog of Las Campanas Compact Groups (LCCGs) contains 76 CGs with a median redshift of z_med = 0.08. The physical properties of these CGs are similar to those from the Hickson (1982) and the Barton et al. (1996) catalogs. Here, we present an atlas of our catalog and briefly describe its general properties.

S. S. Allam; D. L. Tucker

2000-06-12T23:59:59.000Z

402

A study of hand tamper design for compaction of soils  

E-Print Network [OSTI]

Determination Standard Oven Dry Method versus Frying Pan Method Grain Size Distribution Curve Centerville Sand 34 Tamper Comparison Chart: Dry Density after 200 Blows per Square Foot of Layer Dry Density versus Compactive Effort Curve on 3. 0 Inch Square... assumed that the degree of compaction in a soil is dirertly proportional to the weight, height of drop, and number of blows per volume, and inversely propor- tional to the impact face area and the thickness of layer. While all previous tests appear...

McDonough, Brian

1961-01-01T23:59:59.000Z

403

Estimating of the Dry Unit Weight of Compacted Soils Using General Linear Model and Multi-layer Perceptron Neural Networks  

Science Journals Connector (OSTI)

Compaction of earth fill is a very important stage of construction projects. Degree of compaction is defined by relative compaction. The relative compaction of a compacted earth fill is calculated by dividing the dry unit weight obtained from in situ ... Keywords: Dry unit weight, Earth fill, General linear model, Multi-layer perceptron neural networks, Relative compaction, Standard Proctor test

Ersin Kolay, Tugce Baser

2014-05-01T23:59:59.000Z

404

ORNL_TM360_Concrete_NDE_Roadmap  

Broader source: Energy.gov (indexed) [DOE]

60 60 Light Water Reactor Sustainability Nondestructive Evaluation for Concrete Research and Development Roadmap September 2012 Prepared by Dwight Clayton Michael Hileman DOCUMENT AVAILABILITY Reports produced after January 1, 1996, are generally available free via the U.S. Department of Energy (DOE) Information Bridge. Web site http://www.osti.gov/bridge Reports produced before January 1, 1996, may be purchased by members of the public from the following source. National Technical Information Service 5285 Port Royal Road Springfield, VA 22161 Telephone 703-605-6000 (1-800-553-6847) TDD 703-487-4639 Fax 703-605-6900 E-mail info@ntis.gov Web site http://www.ntis.gov/support/ordernowabout.htm Reports are available to DOE employees, DOE contractors, Energy Technology Data Exchange

405

Computational Design of Novel Multiscale Concrete Rheometers | Argonne  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Suspended particles in a rheometer Suspended particles in a rheometer This simulation image shows suspended particles in a rheometer for NIST's proposed mortar SRM. The spheres, which are color coded by their starting location in the rheometer, are suspended in a cement paste with properties derived from NIST's cement paste SRM. Nicos Martys and Steven G. Satterfield, National Institute of Standards and Technology Computational Design of Novel Multiscale Concrete Rheometers PI Name: William George PI Email: wgeorge@nist.gov Institution: National Institute of Standards and Technology (NIST) Allocation Program: INCITE Allocation Hours at ALCF: 40 Million Year: 2014 Research Domain: Materials Science Understanding the mechanisms of dispersion or agglomeration of particulate matter in complex fluids, such as suspensions, is of technological

406

Mobile system for microwave removal of concrete surfaces  

DOE Patents [OSTI]

A method and apparatus for the microwave removal of contaminated concrete surfaces. The apparatus comprises a housing adapted to pass over a support surface. The housing includes a waveguide for directing microwave energy to the surface at an angle maximizing absorption of microwave energy by the surface. The apparatus is further provided with a source of microwave energy operably associated with the waveguide, wherein the microwave energy has a frequency of between about 10.6 GHz and about 24 GHz and acts to remove the uppermost layer from the surface. The apparatus further includes a debris containment assembly comprising a vacuum assembly operably associated with the housing. The vacuum assembly is adapted to remove debris from the area adjacent the surface.

White, Terry L. (Oak Ridge, TN); Bigelow, Timothy S. (Knoxville, TN); Schaich, Charles R. (Lenoir City, TN); Foster, Jr., Don (Knoxville, TN)

1997-01-01T23:59:59.000Z

407

Integrative seismic safety evaluation of a high concrete arch dam  

Science Journals Connector (OSTI)

Abstract An integrative seismic safety evaluation of an arch dam should include all sources of nonlinearities, dynamic interactions between different components and the external loads. The present paper investigates the calibration procedure and nonlinear seismic response of an existing high arch dam. The first part explains the conducted analyses for the static and thermal calibrations of the dam based on site measurements. The second part investigates the nonlinear seismic analysis of the calibrated model considering the effect of joints, cracking of mass concrete, reservoir–dam–rock interaction, hydrodynamic pressure inside the opened joints and the geometric nonlinearity. Penetration of the water inside the opened joints accelerates the damage process. The integrative seismic assessment of a case study shows that the dam will fail under the maximum credible earthquake scenario. The dam is judged to be severely damaged with extensive cracking and the joints undergo opening/sliding. A systematic procedure is proposed for seismic and post-seismic safety of dams.

M.A. Hariri-Ardebili; M.R. Kianoush

2014-01-01T23:59:59.000Z

408

A floating platform of concrete for offshore wind turbine  

Science Journals Connector (OSTI)

A floating platform concept is introduced in this paper for offshore wind turbine. A vertical cylinder on the top of an elliptical sphere forms the principal configuration of the platform. The analysis of the dynamic performance of an example platform with 5 MW wind turbine by means of the well-established linear theory for the dynamics of marine constructions in waves shows that the platform is able to secure the normal function of the wind turbine in waves up to rough sea state and has the required dynamic performance for survival in extreme waves by adopting a survival ballast condition. An important feature of this concept is that reinforced concrete can be used as cost-efficient construction material so that the service life several times longer than similar steel constructions can be obtained despite of the marine corrosive and erosive environment. Thus this kind of platform can become competitive in the economical sustainable and environment-friendly aspect.

Jianbo Hua

2011-01-01T23:59:59.000Z

409

Fly ash and concrete: a study determines whether biomass, or coal co-firing fly ash, can be used in concrete  

SciTech Connect (OSTI)

Current US national standards for using fly ash in concrete (ASTM C618) state that fly ash must come from coal combustion, thus precluding biomass-coal co-firing fly ash. The co-fired ash comes from a large and increasing fraction of US power plants due to rapid increases in co-firing opportunity fuels with coal. The fly ashes include coal fly ash, wood fly ash from pure wood combustion, biomass and coal co-fired fly ash SW1 and SW2. Also wood fly ash is blended with Class C or Class F to produce Wood C and Wood E. Concrete samples were prepared with fly ash replacing cement by 25%. All fly ash mixes except wood have a lower water demand than the pure cement mix. Fly ashes, either from coal or non coal combustion, increase the required air entraining agent (AEA) to meet the design specification of the mixes. If AEA is added arbitrarily without considering the amount or existence of fly ash results could lead to air content in concrete that is either too low or too high. Biomass fly ash does not impact concrete setting behaviour disproportionately. Switch grass-coal co-fired fly ash and blended wood fly ash generally lie within the range of pure coal fly ash strength. The 56 day flexure strength of all the fly ash mixes is comparable to that of the pure cement mix. The flexure strength from the coal-biomass co-fired fly ash does not differ much from pure coal fly ash. All fly ash concrete mixes exhibit lower chloride permeability than the pure cement mixes. In conclusion biomass coal co-fired fly ash perform similarly to coal fly ash in fresh and hardened concrete. As a result, there is no reason to exclude biomass-coal co-fired fly ash in concrete.

Wang, Shuangzhen; Baxter, Larry

2006-08-01T23:59:59.000Z

410

A concrete performance test for delayed ettringite formation: Part II validation  

Science Journals Connector (OSTI)

Delayed ettringite formation (DEF) is a rare problem of concrete, whose reaction mechanisms have been investigated by a large number of studies. In order to develop a performance test, the authors have conducted a feasibility study and an optimization study followed by this validation study. A performance test was previously developed to evaluate the risk of expansion as a result of DEF for a given “concrete/heating” combination to be evaluated. This paper presents the results of the validation study and explains the necessary conditions that must be applied for this test to be used as part of a rigorous preventive procedure. Data has been collected to reproduce the heat development in concrete under actual conditions on site or in a prefabrication factory. Concrete/heating combinations were studied for which 10 or 20 years' experience of the use of the concrete in wet environments existed. After nearly 300 days of testing, all the laboratory results reproduced the behaviour observed in-situ. On the basis of these macroscopic measurements and microscopic observations, DEF susceptible concretes can be distinguished from concretes that have never caused problems, despite being heated to 80 °C in early age. This test program therefore, confirms the reliability of the proposed performance test.

Alexandre Pavoine; Loïc Divet; Stéphane Fenouillet

2006-01-01T23:59:59.000Z

411

Study on the characteristics of high-strength lightweight concrete for icy waters  

SciTech Connect (OSTI)

The authors have developed a new lightweight coarse aggregate whose surface is covered by a high molecular paraffin to prevent water absorption into the aggregate under high pumping pressure. The coated aggregate makes it possible to produce lightweight concrete with high durability against freeze/thaw cycles, abrasion and fire. In order to verify the efficiency of the coated aggregate and the durability of the concrete using the aggregate, various tests on the coated aggregate and concrete have been carried out. This paper reports on the main results obtained from various tests.

Asai, Y.; Itoh, Y.; Kanie, S.; Sakai, M. [Taisei Corp., Tokyo (Japan); Saeki, H. [Hokkaido Univ., Sapporo (Japan)

1994-12-31T23:59:59.000Z

412

Numerical modelling of the strength of highly porous aerated autoclaved concrete  

SciTech Connect (OSTI)

Highly porous building materials like aerated autoclaved concrete are characterized by low thermal conductivity and high mechanical strength, which both strongly depend on porosity. The influence of porosity distribution on the compressive strength of aerated autoclaved concrete was investigated by using finite element analysis and multiaxial Weibull theory. Calculations of failure probability of microstructures with ordered as well as random pore configurations show a dependence of compressive strength on the Weibull modulus of the matrix material and the size and arrangement of pores. The results of the calculations are compared to experimental data of aerated autoclaved concrete.

Schenider, T.; Greil, P. [Univ. of Erlangen-Nuernberg, Erlangen (Germany). Dept. of Materials Science; Schober, G. [Hebel AG, Fuerstenfeldbruck (Germany). Materialtechnische Entwicklung

1998-12-31T23:59:59.000Z

413

Tolerable Strains for HMA Overlays over Concrete Pavements  

E-Print Network [OSTI]

.13 Heating of the gyratory compaction mold Figure 3.14 Pouring of the mix into a heated mold Figure 3.15 Placing of a mold into the Superpave gyratory compactor Figure 3.16 Mold inside the Superpave gyratory compactor Figure 3.17 Extruding of a... Control Panel 26 3.1.2 Direct shear box Direct shear box is generally used to determine shear resistance of soil. The box comprises of two rectangular sections placed on each other. A screw system can be used to adjust the spacing between...

Gautam, Ashwani

2009-06-10T23:59:59.000Z

414

Compact Reversed-Field Pinch Reactors (CRFPR): preliminary engineering considerations  

SciTech Connect (OSTI)

The unique confinement physics of the Reversed-Field Pinch (RFP) projects to a compact, high-power-density fusion reactor that promises a significant reduction in the cost of electricity. The compact reactor also promises a factor-of-two reduction in the fraction of total cost devoted to the reactor plant equipment (i.e., fusion power core (FPC) plus support systems). In addition to operational and developmental benefits, these physically smaller systems can operate economically over a range of total power output. After giving an extended background and rationale for the compact fusion approaches, key FPC subsystems for the Compact RFP Reactor (CRFPR) are developed, designed, and integrated for a minimum-cost, 1000-MWe(net) system. Both the problems and promise of the compact, high-power-density fusion reactor are quantitatively evaluated on the basis of this conceptual design. The material presented in this report both forms a framework for a broader, more expanded conceptual design as well as suggests directions and emphases for related research and development.

Hagenson, R.L.; Krakowski, R.A.; Bathke, C.G.; Miller, R.L.; Embrechts, M.J.; Schnurr, N.M.; Battat, M.E.; LaBauve, R.J.; Davidson, J.W.

1984-08-01T23:59:59.000Z

415

Concrete Company Aims Higher for More Wind Energy | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Concrete Company Aims Higher for More Wind Energy Concrete Company Aims Higher for More Wind Energy Concrete Company Aims Higher for More Wind Energy July 29, 2010 - 6:41pm Addthis The EnergySmart Jobs program is a three-pronged approach to creating “green jobs” for Californians while also increasing energy efficiency at businesses around the state. | File photo The EnergySmart Jobs program is a three-pronged approach to creating "green jobs" for Californians while also increasing energy efficiency at businesses around the state. | File photo Stephen Graff Former Writer & editor for Energy Empowers, EERE What does this mean for me? Tindall Corporation received $16.7 million in 48C tax credits to build new plant Kansas facility will manufacture concrete wind tower bases over 100 meters in height

416

The Object of the Atlantic: Concrete Aesthetics in Cuba, Brazil, and Spain, 1868-1968  

E-Print Network [OSTI]

Concrete Aesthetics in Cuba, Brazil, and Spain, 1868–1968,in the Back- lands of Brazil. Pittsburgh: University ofCosta, Emília Viotti da. “Brazil: The Age of Reform, 1870–

Price, Rachel L.

2014-01-01T23:59:59.000Z

417

Concrete Security for Entity Recognition: The Jane Doe Protocol (Full Paper)  

E-Print Network [OSTI]

://medsec.medien.uni-weimar.de/ 2 Technical University of Denmark http://www.erikzenner.name/ 3 escrypt Inc., USA http a formal proof of its concrete security. The protocol neither em- ploys asymmetric cryptography, nor

418

USING THE CHLORIDE MIGRATION RATE TO PREDICT THE CHLORIDE PENETRATION RESISTANCE OF CONCRETE  

Science Journals Connector (OSTI)

An experimental investigation is conducted to study the relationship between the chloride diffusion coefficient and charge passed. In this study, the concrete specimens made with different w/c (ranging from 0....

S.W. Cho; S.C. Chiang

2006-01-01T23:59:59.000Z

419

Mechanical properties of polypropylene-fiber reinforced concrete after gamma irradiation  

E-Print Network [OSTI]

and Engineering and Center for Advanced Research and Technology (CART), University of North Texas, 1150 Union properties of hydraulic concretes elaborated with Port- land cement, water, silica sand, marble

North Texas, University of

420

Tilt-up concrete panels : an investigation of flexural stresses and punching shear during lifting  

E-Print Network [OSTI]

Tilt-up construction is becoming more popular in the United States due to its ease of construction, reliability, and relatively low construction and maintenance costs. In its most typical form, a concrete panel is cast on ...

Bono, Matthew P. (Matthew Paul)

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Corrosion initiation and propagation on corrosion resistant alloys embedded in concrete by accelerated chloride transport.  

E-Print Network [OSTI]

??Two duplex stainless steels rebars: UNS32304SS and UNS32101SS, were selected to investigate the corrosion initiation and propagation in reinforced concrete specimens. The investigation is divided… (more)

Gutierrez Tellez, Francisco.

2013-01-01T23:59:59.000Z

422

DYNAPCON: a computer code for dynamic analysis of prestressed concrete structures. [LMFBR  

SciTech Connect (OSTI)

A finite element computer code for the transient analysis of prestressed concrete reactor vessels (PCRVs) for LMFBR containment is described. The method assumes rotational symmetry of the structure. Time integration is by an explicit method. The quasistatic prestressing operation of the PCRV model is performed by a dynamic relaxation technique. The material model accounts for the crushing and tensile cracking in arbitrary direction in concrete and the elastic-plastic behavior of reinforcing steel. The variation of the concrete tensile cracking and compressive crushing limits with strain rate is taken into account. Relative slip is permitted between the concrete and tendons. Several example solutions are presented and compared with experimental results. These sample problems range from simply supported beams to small scale models of PCRV's. It is shown that the analytical methods correlate quite well with experimental results, although in the vicinity of the failure load the response of the models tend to be quite sensitive to input parameters.

Marchertas, A.H.

1982-09-01T23:59:59.000Z

423

Concrete Security Analysis of CTR-OFB and CTR-CFB Modes of Operation  

Science Journals Connector (OSTI)

In [1...], they gave the notions of security for the symmetric encryption and provided a concrete security analysis of the XOR, CTR, and CBC schemes. Among the three schemes, the CTR scheme achieves the best conc...

Jaechul Sung; Sangjin Lee; Jongin Lim…

2002-01-01T23:59:59.000Z

424

Evaluation of the filler effects on fatique cracking and permanent deformation of asphalt concrete mixtures  

E-Print Network [OSTI]

The addition of hydrated lime to asphalt has shown to be beneficial with an improvement in the Theological properties of the binder, as well as resistance to permanent deformation (rutting) and fatigue cracking of asphalt concrete mixtures...

Izzo, Richard P

1997-01-01T23:59:59.000Z

425

Environmental durability of FRP bond to concrete subjected to freeze-thaw action  

E-Print Network [OSTI]

An experimental study was performed to determine the environmental durability of the adhesive bond between fiber-reinforced plastic (FRP) and concrete. The study specifically focused on freeze-thaw cycling exposure of such ...

Dohnálek, Pavel

2006-01-01T23:59:59.000Z

426

Neutron scattering in concrete and wood: Part II—oblique incidence  

Science Journals Connector (OSTI)

......Scientific and Technical Notes Neutron scattering in concrete and wood: Part...radiotherapy rooms. (b) Geometry of neutron scattering simulations. Another empirical...due to capture gamma rays. NEUTRON SCATTERING-MONTE CARLO SIMULATION RESULTS......

A. Facure; A. X. Silva; J. C. Rivera; R. C. Falcão

2008-02-01T23:59:59.000Z

427

Cast-Concrete Products Made with FBC Ash and Wet-Collected Coal-Ash  

E-Print Network [OSTI]

. DOI: 10.1061/ ASCE 0899-1561 2005 17:6 659 CE Database subject headings: Recycling; Ashes; Concrete et al. 1991 . Fluidized bed combustion FBC ash is the ash produced by an FBC boiler in which the coal

Wisconsin-Milwaukee, University of

428

A regression model predicting the compressive strength of concrete by means of nondestructive, acoustic measurements  

E-Print Network [OSTI]

A sample size of 81, 4" diameter concrete standard cylinders were tested using nondestructive means. These cylinders were collected from three different ready-mix plants across Texas located in Houston, San Antonio and Victoria. The sound...

Pinto, Zeena Blossom

2012-06-07T23:59:59.000Z

429

Design and analysis of a concrete modular housing system constructed with 3D panels  

E-Print Network [OSTI]

An innovative modular house system design utilizing an alternative concrete residential building system called 3D panels is presented along with an overview of 3D panels as well as relevant methods and markets. The proposed ...

Sarcia, Sam Rhea, 1982-

2004-01-01T23:59:59.000Z

430

A Continuum Coupled Moisture-mechanical Constitutive Model for Asphalt Concrete  

E-Print Network [OSTI]

constitutive relationships are implemented in the Pavement Analysis using Nonlinear Damage Approach (PANDA) finite element (FE) package to model the moisture damage effect on the complex environmental-mechanical response of asphalt concrete. The developed...

Shakiba, Maryam

2013-12-09T23:59:59.000Z

431

Chip Seals for Asphalt Concrete Pavements: A Proposed Emulsion Residue Specification and Existing Pavement Texture Evaluation  

E-Print Network [OSTI]

Chip seals are a pavement surface treatment used for maintaining asphalt concrete pavements. National Cooperative Highway Research Program (NCHRP) Project 14-17 was performed to produce a national Chip Seal Manual which would consolidate the best...

Hoyt, Denise

2012-07-16T23:59:59.000Z

432

Advancement of Erosion Testing, Modeling, and Design of Concrete Pavement Subbase Layers  

E-Print Network [OSTI]

Concrete pavement systems have great capacity to provide long service lives; however, if the subbase layer is improperly designed or mismanaged, service life would be diminished significantly since the subbase layer performs many important roles...

Jung, Youn Su

2010-10-12T23:59:59.000Z

433

Modeling the Effect of Curing on Early Age Distress Potential of Concrete Pavement  

E-Print Network [OSTI]

in concrete structure. The results indicated that the constructability index was able to capture and demonstrate the effect of different parameters mentioned above on the constructability of rigid pavement/overlay projects....

Bari, Muhammad Ehsanul

2014-04-11T23:59:59.000Z

434

Influence of coarse aggregate size, shape and surface texture on rutting of hot mix asphalt concrete  

E-Print Network [OSTI]

The objectives of this study were to: 1 ) Evaluate the influence of coarse aggregate shape and surface texture on deformation characteristics of asphalt concrete, 2) Characterize aggregate elongation, shape and texture using fractal dimensional...

Yeggoni, Mohan

2012-06-07T23:59:59.000Z

435

New production process for insulation blocks composed of EPS and lightweight concrete containing pumice aggregate  

Science Journals Connector (OSTI)

This study introduces a new production method for production of the insulation blocks made of pumice aggregate, lightweight concrete and expanded polystyrene foam (EPS). Products produced via this method ... × he...

Ali Sariisik; Gencay Sariisik

2012-09-01T23:59:59.000Z

436

Effect of cumulative seismic damage and corrosion on life-cycle cost of reinforced concrete bridges  

E-Print Network [OSTI]

reinforced concrete (RC) bridges in earthquake prone regions. The approach is developed by combining cumulative seismic damage and damage associated to corrosion due to environmental conditions. Cumulative seismic damage is obtained from a low-cycle fatigue...

Kumar, Ramesh

2009-05-15T23:59:59.000Z

437

High-performance heavy concrete as a multi-purpose shield  

Science Journals Connector (OSTI)

......materials other than depleted uranium(14). Considering the possible hazards of depleted uranium, it can be claimed that...transmission through concrete. Health Phys. (2003) 84:180-187...web.ead.anl.gov/uranium/pdf/ducretecosteffec......

S. M. J. Mortazavi; M. A. Mosleh-Shirazi; P. Roshan-Shomal; N. Raadpey; M. Baradaran-Ghahfarokhi

2010-12-01T23:59:59.000Z

438

Determining the Impact of Concrete Roadways on Gamma Ray Background Readings for Radiation Portal Monitoring Systems  

E-Print Network [OSTI]

locations have reported abnormally high gamma background count rates. The higher background data has been attributed, in part, to the concrete surrounding the portal monitors. Higher background can ultimately lead to more material passing through the RPMs...

Ryan, Christopher Michael

2012-07-16T23:59:59.000Z

439

Assessment of durability performance of "Early-Opening-to-Traffic" Portland Cement Concrete pavement and patches  

E-Print Network [OSTI]

-thaw, shrinkage, chemical attack, abrasion resistance, fatigue life, volumetric expansion, practicality, and concrete costs. The assessment discusses material combinations, mixture designs, and construction practices on performance. A computer program using...

Shrestha, Pradhumna Babu

1999-01-01T23:59:59.000Z

440

Effects from Alkali-Silica Reacton and Delayed Ettringite Formation on Reinforced Concrete Column Lap Splices.  

E-Print Network [OSTI]

??Reinforced concrete bridge columns can deteriorate prematurely due to the alkali-silica reaction (ASR) and/or delayed ettringite formation (DEF), causing internal expansion and cracking on the… (more)

Eck, Mary

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Concrete Company Aims Higher for More Wind Energy | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Concrete Company Aims Higher for More Wind Energy Concrete Company Aims Higher for More Wind Energy Concrete Company Aims Higher for More Wind Energy July 29, 2010 - 6:41pm Addthis The EnergySmart Jobs program is a three-pronged approach to creating “green jobs” for Californians while also increasing energy efficiency at businesses around the state. | File photo The EnergySmart Jobs program is a three-pronged approach to creating "green jobs" for Californians while also increasing energy efficiency at businesses around the state. | File photo Stephen Graff Former Writer & editor for Energy Empowers, EERE What does this mean for me? Tindall Corporation received $16.7 million in 48C tax credits to build new plant Kansas facility will manufacture concrete wind tower bases over 100 meters in height

442

Ultrasonic Inspection of Tendon Ducts in Concrete Slabs Using 3D-SAFT  

Science Journals Connector (OSTI)

The main purpose to use ultrasonic pulse echo techniques for concrete are the following testing B;problems: Injections faults in tendon ducts because they lead to a loss of the...

M. Krause; W. Müller; H. Wiggenhauser

1997-01-01T23:59:59.000Z

443

Concrete Plant International (2008) REACT: Reducing Early-Age Cracking Today  

E-Print Network [OSTI]

construction. As is usually the case, the truth likely lies between these two extremes, perhaps humidity, wind speed, and concrete temperature to the evaporation rate from a water surface. Recently

Bentz, Dale P.

444

Seismic Performance, Modeling, and Failure Assessment of Reinforced Concrete Shear Wall Buildings  

E-Print Network [OSTI]

Post- Tensioned Concrete Buildings,” PEER Report 2011/104,RC shear walls in high-rise buildings,” The Young ResearcherExtended 3D Analysis of Building Structures, Computers and

Tuna, Zeynep

2012-01-01T23:59:59.000Z

445

Laboratory Evaluation of Hot-Mix Asphalt Concrete Fatigue Cracking Resistance  

E-Print Network [OSTI]

LABORATORY EVALUATION OF HOT-MIX ASPHALT CONCRETE FATIGUE CRACKING RESISTANCE A Thesis by BRANDON PARKER JAMISON Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 2010 Major Subject: Civil Engineering LABORATORY EVALUATION OF HOT-MIX ASPHALT CONCRETE FATIGUE CRACKING RESISTANCE A Thesis by BRANDON PARKER JAMISON Submitted to the Office of Graduate...

Jamison, Brandon Parker

2012-02-14T23:59:59.000Z

446

A visual assessment of the concrete vaults which surround underground waste storage tanks  

SciTech Connect (OSTI)

Radioactive waste produced at the Savannah River Site (SRS) is stored in underground tanks. There are four different waste tank designs. For each waste tank design the outermost containment shield between the waste and the soil is a concrete vault surrounding the carbon steel liner(s). Should the primary and/or secondary liner be breached, the concrete vault would slow transport of the waste so that contamination of the soil is minimized. The type 3 waste tanks have a stated design life of 40--60 years. With the uncertainty of the schedule for transfer of the waste to the Defense Waste Processing Facility, it is conceivable that the tanks will be required to function past their design life. The Department of Energy formed a Waste Tank Structural Integrity Panel to investigate the potential for aging and degradation of underground radioactive waste storage tanks employed in the weapons complex. The panel is focusing on how each site in the complex: (1) inspects the waste tanks for degradation, (2) understands the potential degradation mechanisms which may occur at their sites, and (3) mitigates the known potential degradation mechanisms. In addition to the carbon steel liners, the degradation of the concrete vault has also been addressed by the panel. High Level Waste Engineering (HLWE) at SRS has formed a task team to identify key issues that determine and/or effect the condition of the concrete. In June 1993, slides were reviewed which showed the inside of the concrete vault in Type 1, 2, and 4 tanks. The authors subsequently visited the tank farm and assessed the visible portions of the outer concrete vault. Later a team of engineers knowledgeable in concrete degradation performed a walk-down. Photographs showing the concrete condition were taken at this time. This report summarizes the findings of these walk-downs and reinforces previous recommendations.

Wiersma, B.J.; Shurrab, M.S.

1993-12-01T23:59:59.000Z

447

LWR Sustainability: Assessment of Aging of Nuclear Power Plant Safety Related Concrete Strutures  

SciTech Connect (OSTI)

Current regulatory testing and inspection requirements are reviewed and a summary of degradation experience is presented. Techniques commonly used to inspect NPP concrete structures to assess and quantify age-related degradation are summarized. An approach for conduct of condition assessments of structures in NPPs is presented. Criteria, based primarily on visual indications, are provided for use in classification and assessment of concrete degradation. Materials and techniques for repair of degraded structures are generally discussed.

Graves III, Herman [U.S. Nuclear Regulatory Commission; Naus, Dan J [ORNL

2013-01-01T23:59:59.000Z

448

Special challenges in design and construction of concrete structures in shallow water and soft soil  

SciTech Connect (OSTI)

The paper summarizes briefly the trends in offshore concrete structures in the North Sea and reviews the main decisive design requirements. General design process and foundation design with emphasis on soft soil conditions are described and discussed. Further the paper presents 3 gravity based concrete platforms for soft soil in 145 m, 75 m and 20 m water depths, respectively. Particulars on the construction site and work, and main items on project execution model are discussed.

Loset, O. [Kvaerner Concrete Construction, Hovik (Norway); Schroder, K. [Norwegian Geotechnical Inst., Oslo (Norway)

1994-12-31T23:59:59.000Z

449

Improved design procedure for embedded plates in gravity anchors for precast concrete panels  

E-Print Network [OSTI]

is considered, and second, the shear area of the concrete resisting the applied shear to the studs is considered. Typically, the latter parameter controls the design, since most plate and stud anchorages are installed fairly close to the edge of a wall panel...IMPROVED DESIGN PROCEDURE FOR EMBEDDED PLATES IN GRAVITy ANCHORS FOR PRECAST CONCRETE PANELS A Thesis by Lawrence Fred Fragomeli Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements...

Fragomeli, Lawrence Fred

2012-06-07T23:59:59.000Z

450

Characterization of basin concrete in support of structural integrity demonstration for extended storage  

SciTech Connect (OSTI)

Concrete core samples from C basin were characterized through material testing and analysis to verify the design inputs for structural analysis of the L Basin and to evaluate the type and extent of changes in the material condition of the concrete under extended service for fuel storage. To avoid the impact on operations, core samples were not collected from L area, but rather, several concrete core samples were taken from the C Basin prior to its closure. C basin was selected due to its similar environmental exposure and service history compared to L Basin. The microstructure and chemical composition of the concrete exposed to the water was profiled from the water surface into the wall to evaluate the impact and extent of exposure. No significant leaching of concrete components was observed. Ingress of carbonation or deleterious species was determined to be insignificant. No evidence of alkali-silica reactions (ASR) was observed. Ettringite was observed to form throughout the structure (in air voids or pores); however, the sulfur content was measured to be consistent with the initial concrete that was used to construct the facility. Similar ettringite trends were observed in the interior segments of the core samples. The compressive strength of the concrete at the mid-wall of the basin was measured, and similar microstructural analysis was conducted on these materials post compression testing. The microstructure was determined to be similar to near-surface segments of the core samples. The average strength was 4148 psi, which is well-above the design strength of 2500 psi. The analyses showed that phase alterations and minor cracking in a microstructure did not affect the design specification for the concrete.

Duncan, A.

2014-09-30T23:59:59.000Z

451

Stress-Strain Model of Unconfined and Confined Concrete and Stress-block Parameters  

E-Print Network [OSTI]

identified that concrete compressive strength, confining reinforcement ratio and section geometry as the major parameters that control the stress-strain relation of confined concrete. The authors identified that a convenient way of expressing... consideration within spacing 21 , = yield stress of confining reinforcement, = center distance between hoop/ties confining reinforcement. The influence of the section geometry was represented by the ?section geometry factor?, , which expresses...

Murugesan Reddiar, Madhu Karthik

2010-07-14T23:59:59.000Z

452

Cape Light Compact - Commercial, Industrial and Municipal Buildings Energy  

Broader source: Energy.gov (indexed) [DOE]

Cape Light Compact - Commercial, Industrial and Municipal Buildings Cape Light Compact - Commercial, Industrial and Municipal Buildings Energy Efficiency Rebate Program Cape Light Compact - Commercial, Industrial and Municipal Buildings Energy Efficiency Rebate Program < Back Eligibility Commercial Industrial Local Government Savings Category Heating & Cooling Commercial Heating & Cooling Heating Cooling Manufacturing Other Construction Heat Pumps Appliances & Electronics Commercial Lighting Lighting Commercial Weatherization Water Heating Maximum Rebate Retrofit: 50% of cost of upgraded equipment, or an amount that buys down the cost of the project to a 1.5 year simple payback. New Construction: 70% of incremental cost of higher efficiency equipment, or an amount that buys down the incremental investment to a 1.5 year simple

453

Energy Cost Calculator for Compact Fluorescent Lamps | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Compact Fluorescent Lamps Compact Fluorescent Lamps Energy Cost Calculator for Compact Fluorescent Lamps October 8, 2013 - 2:18pm Addthis This tool calculates the payback period for your calc retrofit project. Modify the default values to suit your project requirements. Existing incandescent lamp wattage Watts Incandescent lamp cost dollars Incandescent lamp life 1000 hours calc wattage Watts calc cost dollars calc life (6000 hours for moderate use, 10000 hours for high use) 8000 hours Number of lamps in retrofit project Hours operating per week hours Average cost of electricity 0.06 $/kWh Relamper labor costs $/hr Time taken to retrofit all lamps in this project min Time taken to relamp one lamp min Type of Relamping Practiced: Group Relamping: Calculate Simple Payback Period months

454

Cape Light Compact - Residential Energy Efficiency Rebate Program |  

Broader source: Energy.gov (indexed) [DOE]

Cape Light Compact - Residential Energy Efficiency Rebate Program Cape Light Compact - Residential Energy Efficiency Rebate Program Cape Light Compact - Residential Energy Efficiency Rebate Program < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heating Home Weatherization Commercial Weatherization Cooling Construction Design & Remodeling Sealing Your Home Ventilation Heat Pumps Windows, Doors, & Skylights Solar Water Heating Maximum Rebate Home Energy Assessment/Weatherization: $2,000 Income Eligible Weatherization Measures: $2,000 - $3,000 Program Info State Massachusetts Program Type Local Rebate Program Rebate Amount Home Energy Assessment/Weatherization: 75% Single Family Energy Star Home: $750 - $8,000 Multi-Family Energy Star Home: $350 - $4,000/unit Income Eligible Weatherization Measures: 100% of cost

455

Engineering Prototype for a Compact Medical Dielectric Wall Accelerator  

Science Journals Connector (OSTI)

A compact accelerator system architecture based on the dielectric wall accelerator (DWA) for medical proton beam therapy has been developed by the Compact Particle Acceleration Corporation (CPAC). The major subsystems are a Radio Frequency Quadrupole (RFQ) injector linac a pulsed kicker to select the desired proton bunches and a DWA linear accelerator incorporating a high gradient insulator (HGI) with stacked Blumleins to produce the required acceleration energy. The Blumleins are switched with solid state laser?driven optical switches integrated into the Blumlein assemblies. Other subsystems include a high power pulsed laser fiber optic distribution system electrical charging system and beam diagnostics. An engineering prototype has been constructed and characterized and these results will be used within the next three years to develop an extremely compact 150 MeV system capable of modulating energy beam current and spot size on a shot?to?shot basis. This paper presents the details the engineering prototype experimental results and commercialization plans.

Anthony Zografos; Andy Hening; Vladimir Joshkin; Kevin Leung; Dave Pearson; Henry Pearce?Percy; Mario Rougieri; Yoko Parker; John Weir; Donald Blackfield; Yu?Jiuan Chen; Steven Falabella; Gary Guethlein; Brian Poole; Robert W. Hamm; Reinard Becker

2011-01-01T23:59:59.000Z

456

Compact multiwavelength transmitter module for multimode fiber optic ribbon cable  

DOE Patents [OSTI]

A compact multiwavelength transmitter module for multimode fiber optic ribbon cable, which couples light from an M.times.N array of emitters onto N fibers, where the M wavelength may be distributed across two or more vertical-cavity surface-emitting laser (VCSEL) chips, and combining emitters and multiplexer into a compact package that is compatible with placement on a printed circuit board. A key feature is bringing together two emitter arrays fabricated on different substrates--each array designed for a different wavelength--into close physical proximity. Another key feature is to compactly and efficiently combine the light from two or more clusters of optical emitters, each in a different wavelength band, into a fiber ribbon.

Deri, Robert J. (Pleasanton, CA); Pocha, Michael D. (Livermore, CA); Larson, Michael C. (Goleta, CA); Garrett, Henry E. (Livermore, CA)

2002-01-01T23:59:59.000Z

457

Discovery of an isolated compact elliptical galaxy in the field  

E-Print Network [OSTI]

We present the discovery of an isolated compact elliptical (cE) galaxy, found during a search of SDSS DR7 for cEs, and for which we obtained WHT/ACAM imaging. It is ~900 kpc distant from its nearest neighbour, has an effective r-band radius of ~500 pc and a B-band mean surface brightness within its effective radius of 19.75 mag/arcsec. Serendipitous deep SuprimeCam imaging shows that there is no underlying disk. Its isolated position suggests that there is an alternative channel to the stripping scenario for the formation of compact ellipticals. We also report analysis of recent deeper imaging of the previous candidate free-flying cE, which shows that it is, in fact, a normal dwarf elliptical (dE). Hence the new cE reported here is the first confirmed isolated compact elliptical to be found in the field.

Huxor, Avon; Price, James

2013-01-01T23:59:59.000Z

458

Compact two-beam push-pull free electron laser  

DOE Patents [OSTI]

An ultra-compact free electron laser comprising a pair of opposed superconducting cavities that produce identical electron beams moving in opposite directions such that each set of superconducting cavities accelerates one electron beam and decelerates the other electron beam. Such an arrangement, allows the energy used to accelerate one beam to be recovered and used again to accelerate the second beam, thus, each electron beam is decelerated by a different structure than that which accelerated it so that energy exchange rather than recovery is achieved resulting in a more compact and highly efficient apparatus.

Hutton, Andrew (Yorktown, VA)

2009-03-03T23:59:59.000Z

459

Radiation exposure inside reinforced concrete buildings at Nagasaki  

SciTech Connect (OSTI)

The biological effects on the residents of Hiroshima and Nagasaki due to initial-irradiation exposure during the nuclear attacks of World War II was recognized immediately as an important source of information. After the war, an extensive effort gathered data concerning the locations of individuals at the time of the attack and their subsequent medical histories. The data from personnel located in reinforced concrete buildings are particularly significant, since large groups of occupants received radiation injury without complications due to blast and thermal effects. In order to correlate the radiation dose with physiological effects, the dose to each individual must be calculated. Enough information about the construction of the buildings was available after the war to allow a radiation transport model to be constructed, but the accurate calculation of penetration into such large, thick-walled three dimensional structures was beyond the scope of computing technology until recently. Now, the availability of Cray vector computers and the development of a specially-constructed discrete ordinates transport code, TORT, have combined to allow the successful completion of such a study. This document describes the radiation transport calculations and tabulates the resulting doses by source component and individual case location. An extensive uncertainty analysis is also included. These data are to be used in another study as input to a formal statistical analysis, resulting in a new value for the LD50 dose, i.e., the dose at which the mortality risk is 50%. 55 refs., 67 figs., 70 tabs.

Rhoades, W.A.; Childs, R.L.; Ingersoll, D.T.

1989-05-01T23:59:59.000Z

460

Seismic response of reinforced concrete frames on monopile foundations  

Science Journals Connector (OSTI)

Abstract The paper focuses on the effects of soil–structure interaction on the seismic response of reinforced concrete frames on monopile foundations connected by tie beams. Such systems are usually designed by considering fixed restraints at the column bases and the effects of the foundation compliance have not yet been investigated. The soil–foundation system is analysed in the frequency domain by means of a numerical model that allows obtaining the dynamic impedance functions of the system and the foundation input motion necessary for the subsequent nonlinear inertial soil–structure interaction analysis which is performed in the time domain. Tie beams with different stiffness and soil deposits characterised by three different profiles of shear wave velocity are considered. Results of incremental dynamic analyses carried out on frames with monopile foundations are compared with those obtained considering double-pile foundations and the fixed base assumption. Soil–structure interaction is found to affect considerably the response of frames on monopile foundations by increasing the structural deformation and modifying the evolution of the dissipative mechanisms. Analyses accounting for the actual soil–foundation system compliance and the foundation input motion may be crucial for a reliable prediction of the actual distribution of stresses in the superstructure and the foundation elements.

Sandro Carbonari; Francesca Dezi; Fabrizio Gara; Graziano Leoni

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

THE CLASSIFICATION OF EXCEPTIONAL CDQL WEBS ON COMPACT COMPLEX SURFACES  

E-Print Network [OSTI]

THE CLASSIFICATION OF EXCEPTIONAL CDQL WEBS ON COMPACT COMPLEX SURFACES J. V. PEREIRA AND L. PIRIO Abstract. Codimension one webs are configurations of finitely many codi- mension one foliations in general equation among the first integrals of the foliations defining the web reminiscent of Abel's addition the

Pereira, Jorge Vitório

462

Recent progress on the Compact Ignition Tokamak (CIT)  

SciTech Connect (OSTI)

This report describes work done on the Compact Ignition Tokamak (CIT), both at the Princeton Plasma Physics Laboratory (PPPL) and at other fusion laboratories in the United States. The goal of CIT is to reach ignition in a tokamak fusion device in the mid-1990's. Scientific and engineering features of the design are described, as well as projected cost and schedule.

Ignat, D.W.

1987-01-01T23:59:59.000Z

463

Compact Routing on Internet-Like Graphs Dmitri Krioukov  

E-Print Network [OSTI]

Compact Routing on Internet-Like Graphs Dmitri Krioukov Email: dima@krioukov.net Kevin Fall Intel and simulation, we derive the stretch distribution of this routing scheme on Internet-like interdomain topologies that the average TZ stretch is quite low and virtually independent of . In particular, for the Internet interdomain

Yang, Xiaowei

464

Experimental pressure solution compaction of synthetic halite/calcite aggregates  

E-Print Network [OSTI]

Experimental pressure solution compaction of synthetic halite/calcite aggregates Sergey Zubtsova of weakening of sediment-like aggregates by addition of hard particles. Sieved mixtures of calcite and halite solution. The individual halite grains deform easily by pressure solution creep whereas calcite grains act

465

Compact anhydrous HCl to aqueous HCl conversion system  

DOE Patents [OSTI]

The present invention is directed to an inexpensive and compact apparatus adapted for use with a .sup.196 Hg isotope separation process and the conversion of anhydrous HCl to aqueous HCl without the use of air flow to carry the HCl vapor into the converter system.

Grossman, Mark W. (Belmont, MA); Speer, Richard (S. Hamilton, MA)

1993-01-01T23:59:59.000Z

466

ULTRA?COMPACT ACCELERATOR TECHNOLOGIES FOR APPLICATION IN NUCLEAR TECHNIQUES  

Science Journals Connector (OSTI)

We report on compact accelerator technology development for potential use as a pulsed neutron source quantitative post verifier. The technology is derived from our on?going compact accelerator technology development program for radiography under the US Department of Energy and for a clinic sized compact proton therapy systems under an industry sponsored Cooperative Research and Development Agreement. The accelerator technique relies on the synchronous discharge of a prompt pulse generating stacked transmission line structure with the beam transit. The goal of this technology is to achieve ?10 MV/m gradients for 10 s of nanoseconds pulses and ?100 MV/m gradients for ?1 ns systems. As a post verifier for supplementing existing x?ray equipment this system can remain in a charged stand?by state with little or no energy consumption. We describe the progress of our overall component development effort with the multilayer dielectric wall insulators (i.e. the accelerator wall) compact power supply technology kHz repetition?rate surface flashover ion sources and the prompt pulse generation system consisting of wide?bandgap switches and high performance dielectric materials.

S. Sampayan; G. Caporaso; Y.?J. Chen; V. Carazo; S. Falabella; G. Guethlein; S. Guse; J. R. Harris; S. Hawkins; C. Holmes; M. Krogh; S. Nelson; A. C. Paul; D. Pearson; B. Poole; R. Schmidt; D. Sanders; K. Selenes; S. Sitaraman; J. Sullivan; L. Wang; J. Watson

2009-01-01T23:59:59.000Z

467

SAFETY ASSESSMENT OF THE ARIES COMPACT STELLARATOR DESIGN  

E-Print Network [OSTI]

SAFETY ASSESSMENT OF THE ARIES COMPACT STELLARATOR DESIGN B. J. MERRILL,*a L. A. EL-GUEBALY,b C. This power plant design contains many innovative features to im- prove the physics, engineering, and safety-cooled by flowing lead lithium. In this paper we examine the safety and environmental performance of ARIES

California at San Diego, University of

468

Compact Printed Quadrifilar Helix Antennas for Stratospheric Balloons Telemetry  

E-Print Network [OSTI]

Compact Printed Quadrifilar Helix Antennas for Stratospheric Balloons Telemetry L. Hanane* (1, 2 for meteorological stratospheric balloons. The PQH antenna, patented by the CNES [1], is relatively simple over a wide range of elevation angle. However the reduction in size of modern stratospheric balloon

Boyer, Edmond

469

RESEARCH PAPER Compaction bands induced by borehole drilling  

E-Print Network [OSTI]

: boreholes are often drilled deep into weak porous sandstone formations for the purpose of extracting oil Introduction Boreholes drilled into the Earth's crust for facilitating the extraction of water, oil, naturalRESEARCH PAPER Compaction bands induced by borehole drilling R. Katsman Ã? E. Aharonov Ã? B. C

Einat, Aharonov

470

Carbon RRLs Carbon RRLs towards Ultra-compact HII Regions  

E-Print Network [OSTI]

Carbon RRLs Carbon RRLs towards Ultra-compact HII Regions Dana S. Balser D. Anish Roshi (Raman (Agnes Scott College) #12;Carbon RRLs Carbon Radio Recombination Lines (RRLs) NGC 2024 (Orion B) IC 1795 (W3) Palmer et al. (1967) #12;Carbon RRLs Photodissociation Regions (PDRs) Hollenbach & Tielens (1997

Balser, Dana S.

471

A compact plasma focus device and its neutron emission  

Science Journals Connector (OSTI)

A 2.2-kJ compact plasma focus device was developed and its characteristics of...7 was obtained at 15 hPa deuterium filling pressure. It was found that the neutron yieldY n is strongly correlated w...

Xinxin Wang; Min Han; Zhiwen Wang; Kun Liu

1999-02-01T23:59:59.000Z

472

Compact Wideband Dual-Polarized Microstrip Patch Antenna  

E-Print Network [OSTI]

Compact Wideband Dual-Polarized Microstrip Patch Antenna K. Rambabu*, M. Alam, J. Bornemann and M for microstrip patch antennas. There are numerous methods to couple multiple resonances. Examples include coupled patches [1], patches with slots (e.g. U- and E-shaped) [2], [3], stacked patches [4], and patches

Bornemann, Jens

473

Embedding the bicyclic semigroup into countably compact topological semigroups  

E-Print Network [OSTI]

We study algebraic and topological properties of topological semigroups containing a copy of the bicyclic semigroup $C(p,q)$. We prove that each topological semigroup $S$ with pseudocompact square contains no dense copy of $C(p,q)$. On the other hand, we construct a consistent example of a Tychonov countably compact semigroup containing a copy of $C(p,q)$.

Banakh, Taras; Gutik, Oleg

2008-01-01T23:59:59.000Z

474

Mossbauer Spectroscopic Study of Gamma Irradiation on the Structural Properties of Hematite, Magnetite and Limonite Concrete for Nuclear Reactor Shielding  

Science Journals Connector (OSTI)

This work investigate the effect of gamma irradiation on a heavy type of concrete, constructed for nuclear reactor shield. The effect of gamma irradiation was...

N.A. Eissa; M.S.I. Kany; A.S. Mohamed; A.A. Sallam; M.H. El Fouly

475

Performance-based approach to evaluate alkali-silica reaction potential of aggregate and concrete using dilatometer method  

E-Print Network [OSTI]

....................................................... 27 Aggregate Testing................................................................... 28 Cement-Aggregate Combination Testing ............................... 31 Gel Identification............................................................. 110 Chemistry of Pore Solution in Concrete ...................................... 113 Solubility of ASR Gel.................................................................. 113 Determination of Aggregate...

Shon, Chang Seon

2009-05-15T23:59:59.000Z

476

Earthquake Resilient Tall Reinforced Concrete Buildings at Near-Fault Sites Using Base Isolation and Rocking Core Walls.  

E-Print Network [OSTI]

?? This dissertation pursues three main objectives: (1) to investigate the seismic response of tall reinforced concrete core wall buildings, designed following current building codes,… (more)

Calugaru, Vladimir

2014-01-01T23:59:59.000Z

477

The response of some putting green soil mixtures to compaction  

E-Print Network [OSTI]

. . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . , 11 Sand, soil, and peat ratios used in the test . . . . . . 11 Capillay porosity, non-capillary porosity, visual ratings, weight of clippings, hydraulic conductivity, bulk density and total porosity as indicated . . . , . . . 60 Grams of oven dried...-percent-moisture sand-Houston Black clay various tensions retained by cores of concrete soil-peat when sub]ected to 12. 13. Volume-percent-moisture sand-Houston Black clay various tensions Volume-percent-moisture land sand-Houston Black to various tensions...

Howard, Hugh Leon

2012-06-07T23:59:59.000Z

478

Acoustic emission and compaction creep of quartz sand at subcritical stress  

E-Print Network [OSTI]

Time-dependent fluid-assisted mechanisms such as stress-induced dissolution and subcritical crack growth play an important role in porosity reduction and compaction of granular material in nature. Previous compaction creep experiments on loosely...

Lenz, Steven Christopher

2002-01-01T23:59:59.000Z

479

Safe and compact ammonia storage/delivery systems for SCR-DeNOX...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Safe and compact ammonia storagedelivery systems for SCR-DeNOX in automotive units Safe and compact ammonia storagedelivery systems for SCR-DeNOX in automotive units Presentation...

480

Effective temperature and compactivity of a lattice-gas under gravity  

E-Print Network [OSTI]

The notion of longitudinal effective temperature and its relation with the Edwards compactivity are investigated in an abstract lattice gas model of granular material compacting under gravity and weak thermal vibration.

Mauro Sellitto

2002-07-18T23:59:59.000Z

Note: This page contains sample records for the topic "roller compacted concrete" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Compaction Effects on Uniformity, Moisture Diffusion, and Mechanical Properties of Asphalt Pavements  

E-Print Network [OSTI]

Field compaction of asphalt mixtures is an important process that influences performance of asphalt pavements; however there is very little effort devoted to evaluate the influence of compaction on the uniformity and properties of asphalt mixtures...

Kassem, Emad Abdel-Rahman Ahmed

2011-08-08T23:59:59.000Z

482

Thermal Removal Of Tritium From Concrete And Soil To Reduce Groundwater Impacts  

SciTech Connect (OSTI)

Legacy heavy-water moderator operations at the Savannah River Site (SRS) have resulted in the contamination of equipment pads, building slabs, and surrounding soil with tritium. At the time of discovery the tritium had impacted the shallow (< 3-m) groundwater at the facility. While tritium was present in the groundwater, characterization efforts determined that a significant source remained in a concrete slab at the surface and within the associated vadose zone soils. To prevent continued long-term impacts to the shallow groundwater a CERCLA non-time critical removal action for these source materials was conducted to reduce the leaching of tritium from the vadose zone soils and concrete slabs. In order to minimize transportation and disposal costs, an on-site thermal treatment process was designed, tested, and implemented. The on-site treatment consisted of thermal detritiation of the concrete rubble and soil. During this process concrete rubble was heated to a temperature of 815 deg C (1,500 deg F) resulting in the dehydration and removal of water bound tritium. During heating, tritium contaminated soil was used to provide thermal insulation during which it's temperature exceeded 100 deg C (212 deg F), causing drying and removal of tritium. The thermal treatment process volatiles the water bound tritium and releases it to the atmosphere. The released tritium was considered insignificant based upon Clean Air Act Compliance Package (CAP88) analysis and did not exceed exposure thresholds. A treatability study evaluated the effectiveness of this thermal configuration and viability as a decontamination method for tritium in concrete and soil materials. Post treatment sampling confirmed the effectiveness at reducing tritium to acceptable waste site specific levels. With American Recovery and Reinvestment Act (ARRA) funding three additional treatment cells were assembled utilizing commercial heating equipment and common construction materials. This provided a total of four units to batch treat concrete rubble and soil. Post treatment sampling verified that the activity in the treated soil and concrete met the treatment standards for each medium which allowed the treated concrete rubble and soil to be disposed of on site as backfill. During testing and operations a total of 1,261-m{sup 3} (1,650-yd{sup 3}) of contaminated concrete and soils were treated with an actual incurred cost of $3,980,000. This represents a unit treatment cost of $3,156/m{sup 3} ($2,412/yd{sup 3}). In 2011 the project was recognized with an e-Star Sustainability Award by DOE's Office of Environmental Management.

Jackson, Dennis G.; Blount, Gerald C.; Wells, Leslie H.; Cardoso-Neto, Joao E.; Kmetz, Thomas F.; Reed, Misty L.

2012-12-04T23:59:59.000Z

483

E-Print Network 3.0 - aeropropulsion compact lightweight Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

has developed a true 3- component technique, no calibration, compact instrumentation... Hydro--propulsion Aeropropulsion Aero--propulsionpropulsion Micro jet...

484

Prediction of Asphalt Mixture Compactability from Mixture, Asphalt, and Aggregate Properties  

E-Print Network [OSTI]

. Predicted Plot of CV Neural Net of Entire Data Set for a ............................ 50 Figure 32. Predicted Plot of CV Neural Net of Entire Data Set for AV Nini ................... 51 Figure 33. a versus Predicted a... ................................................... 24 Table 5 HMA Mixing and Compaction Temperatures ............................................. 27 Table 6 Compaction Parameters a, c, and AV Nini ................................................... 38 Table 7 Compaction Parameters m1, m2...

Muras, Andrew J.

2010-07-14T23:59:59.000Z

485

Design of Compact Stacked-Patch Antennas in LTCC multilayer packaging modules for Wireless Applications  

E-Print Network [OSTI]

Design of Compact Stacked-Patch Antennas in LTCC multilayer packaging modules for Wireless: 404-894-3360 Fax: 404-894-4641 Abstract A simple procedure for the design of compact stacked-patch module was proposed for compact RF front-end, which is integrated with a patch antenna [2]. However

Tentzeris, Manos

486

Soranakom, C., Bakhshi M. , and Mobasher, B. " Role of Alkali Resistant Glass Fibers in Suppression of Restrained Shrinkage Cracking of Concrete Materials," 15th International Glass Fibre Reinforced Concrete Association  

E-Print Network [OSTI]

Soranakom, C., Bakhshi M. , and Mobasher, B. " Role of Alkali Resistant Glass Fibers in Suppression of Restrained Shrinkage Cracking of Concrete Materials," 15th International Glass Fibre Reinforced Concrete Association Congress, GRC 2008, CD-Proceedings, Prague, April 20-23, 2008. 1 Role of Alkali Resistant Glass

Mobasher, Barzin

487

Alkali-silica reaction products: Comparison between samples from concrete structures and laboratory test specimens  

SciTech Connect (OSTI)

Alkali-silica gels (ASG) were investigated in concrete from bridge structures (constructed from the 1920s to 2000), as well as in experimental specimens; employing optical microscopy, petrographic image analysis, and scanning electron microscopy combined with energy dispersive spectroscopy (SEM/EDS). The main differences were found in the chemical composition and morphology of the ASGs. ASGs which had formed in older concrete samples (50-80 years old) show a partly crystalline structure and higher Ca{sup 2+} content, indicating their aging and maturation. Younger concrete samples and experimental test specimens exhibit the presence of amorphous ASG. The chemistry of ASG from experimental specimens reflects the chemical composition of accelerating solutions. - Research Highlights: {yields} Quantitative analysis of alkali-silica gels {yields} Comparison of ASR in experimental conditions with ASR in bridge structures {yields} Investigation of factors affecting alkali-silica reaction {yields} Investigation of ASR of different types of aggregates.

Sachlova, Sarka, E-mail: lukschova@seznam.cz; Prikryl, Richard; Pertold, Zdenek

2010-12-15T23:59:59.000Z

488

Integration and road tests of a self-sensing CNT concrete pavement system for traffic detection  

Science Journals Connector (OSTI)

In this paper, a self-sensing carbon nanotube (CNT) concrete pavement system for traffic detection is proposed and tested in a roadway. Pre-cast and cast-in-place self-sensing CNT concrete sensors were simultaneously integrated into a controlled pavement test section at the Minnesota Road Research Facility (MnROAD), USA. Road tests of the system were conducted by using an MnROAD five-axle semi-trailer tractor truck and a van, respectively, both in the winter and summer. Test results show that the proposed self-sensing pavement system can accurately detect the passing of different vehicles under different vehicular speeds and test environments. These findings indicate that the developed self-sensing CNT concrete pavement system can achieve real-time vehicle flow detection with a high detection rate and a low false-alarm rate.

Baoguo Han; Kun Zhang; Tom Burnham; Eil Kwon; Xun Yu

2013-01-01T23:59:59.000Z

489

Study on a Kind of Eco-concrete Retaining Wall's Block with Water Purification Function  

Science Journals Connector (OSTI)

Considering the environmental protection requirements for retaining wall and slope protection in Civil engineering and construction of water conservancy, a new type of retaining wall materials and structures with functions of slop reinforcement, slope greening and water purification was studied. In this paper, it designed a kind of Eco-concrete retaining wall's block which has functions of slope vegetation planting and water purification, and studied functions of water purification of this kind of Eco-concrete retaining wall's block through the water quality purification experiment. It shows that, the maximal disposable removal rates of CoDcr, TN and TP are respectively 87%, 70% and 90%, which means that functions of water purification of this kind of Eco-concrete retaining wall's block are very good.

Song Wen-jie; Fu Hong-yuan; Wang Gui-yao

2012-01-01T23:59:59.000Z

490

Diffusion of Iodine and Rhenium in Category 3 Waste Encasement Concrete and Soil Fill Material  

SciTech Connect (OSTI)

Assessing long-term performance of Category 3 waste cement grouts for radionuclide encasement requires knowledge of the radionuclide-cement interactions and mechanisms of retention (i.e. sorption or precipitation). This understanding will enable accurate prediction of radionuclide fate when the waste forms come in contact with groundwater. A set of diffusion experiments using carbonated and non-carbonated concrete-soil half cells was conducted under unsaturated conditions (4% and 7% by wt moisture content). Spiked concrete half-cell specimens were prepared with and without colloidal metallic iron addition and were carbonated using supercritical carbon dioxide. Spikes of I and Re were added to achieve measurable diffusion profile in the soil part of the half-cell. In addition, properties of concrete materials likely to influence radionuclide migration such as carbonation were evaluated in an effort to correlate these properties with the release of iodine and rhenium.

Wellman, Dawn M.; Mattigod, Shas V.; Whyatt, Greg A.; Powers, Laura; Parker, Kent E.; Wood, Marcus I.

2006-12-15T23:59:59.000Z

491

ANALYTICAL RESULTS FOR MOX COLEMANITE CONCRETE SAMPLES RECEIVED ON NOVEMBER 21, 2013  

SciTech Connect (OSTI)

The Mixed Oxide Fuel Fabrication Facility (MFFF) will use colemanite bearing concrete neutron absorber panels credited with attenuating neutron flux in the criticality design analyses and shielding operators from radiation. The Savannah River National Laboratory (SRNL) is tasked with measuring the total density, partial hydrogen density, and partial boron density of the colemanite concrete. SRNL received two samples of colemanite concrete for analysis on November 21, 2013. The average total density of each of the samples measured by the ASTM method C 642, the average partial hydrogen density was measured using method ASTM E 1131, and the average partial boron density of each sample was measured according to ASTM C 1301. The lower limits and measured values for the total density, hydrogen partial density, and boron partial density are presented. For all the samples tested, the total density and the boron partial density met or exceeded the specified limit. None of the samples met the lower limit for hydrogen partial density.

Reigel, M.

2014-05-19T23:59:59.000Z

492

ANALYTICAL RESULTS FOR MOX COLEMANITE CONCRETE SAMPLES RECEIVED ON SEPTEMBER 4, 2013  

SciTech Connect (OSTI)

The Mixed Oxide Fuel Fabrication Facility (MFFF) will use colemanite bearing concrete neutron absorber panels credited with attenuating neutron flux in the criticality design analyses and shielding operators from radiation. The Savannah River National Laboratory (SRNL) is tasked with measuring the total density, partial hydrogen density, and partial boron density of the colemanite concrete. SRNL received three samples of colemanite concrete for analysis on September 4, 2013. The average total density of each of the samples measured by the ASTM method C 642, the average partial hydrogen density was measured using method ASTM E 1131, and the average partial boron density of each sample was measured according to ASTM C 1301. The lower limits and measured values for the total density, hydrogen partial density, and boron partial density are presented. For all the samples tested, the total density and the boron partial density met or exceeded the specified limit. None of the samples met the lower limit for hydrogen partial density.

Reigel, M.

2014-05-19T23:59:59.000Z

493

NERSC and CRD Help Decipher Science from Compact Accelerator Simulations -  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and CRD Help and CRD Help Decipher Science from Compact Accelerator Simulations NERSC and CRD Help Decipher Science from Compact Accelerator Simulations May 26, 2009 3D Particle Surfing : Electrons are moving from left to right in this LOASIS experiment. The blue shells show the plasma wake, while bunches of surfing electrons are shown as green and yellow. Green reveals low-energy particles, and yellow shows high-energy. The simulation was conducted in the VORPAL framework, and visualized with VisIt and VizSchema. Scientists use many different tools to understand the universe. While telescopes offer valuable insights about interactions between stars, planets and galaxies; particle accelerators give researchers a better understanding of the basic particles that make up these structures, as well

494

Design of the national compact stellarator experiment (NCSX)  

Science Journals Connector (OSTI)

The National Compact Stellarator Experiment (NCSX) [http://www.pppl.gov/ncsx/Meetings/CDR/CDRFinal/EngineeringOverview_R2.pdf] is being designed as a proof of principal test of a quasi-axisymmetric compact stellarator. This concept combines the high beta and good confinement features of an advanced tokamak with the low current, disruption-free characteristics of a stellarator. NCSX has a three-field-period plasma configuration with an average major radius of 1.4 m, an average minor radius of 0.33 m and a toroidal magnetic field on axis of up to 2 T. The stellarator core is a complex assembly of four coil systems that surround the highly shaped plasma and vacuum vessel. Heating is provided by up to four, 1.5 MW neutral beam injectors and provision is made to add 6 MW of ICRH. The experiment will be built at the Princeton Plasma Physics Laboratory, with first plasma expected in 2007.

B.E. Nelson; L.A. Berry; A.B. Brooks; M.J. Cole; J.C. Chrzanowski; H.-M. Fan; P.J. Fogarty; P.L. Goranson; P.J. Heitzenroeder; S.P. Hirshman; G.H. Jones; J.F. Lyon; G.H. Neilson; W.T. Reiersen; D.J. Strickler; D.E. Williamson

2003-01-01T23:59:59.000Z

495

Fracture toughness measurements with subsize disk compact specimens  

SciTech Connect (OSTI)

Special fixtures and test methods have been developed for testing small disk compact specimens (1.25 mm diam by 4.6 mm thick). Specimens of European type 316L austenitic stainless steel were irradiated to damage levels of about 3 dpa at nominal irradiation temperatures of either 90 or 250 C and tested over a temperature range from 20 to 250 C. Results show that irradiation to this dose level at these temperatures reduces the fracture toughness but the toughness remains quite high. The toughness decreases as the test temperature increases. Irradiation at 250 C is more damaging than at 90 C, causing larger decreases in the fracture toughness. The testing shows that it is possible to generate useful fracture toughness data with a small disk compact specimens.

Alexander, D.J.

1994-12-31T23:59:59.000Z

496

Stability of thin-shell interfaces inside compact stars  

E-Print Network [OSTI]

We use the thin-shell Darmois-Israel formalism to model and assess the stability of the interfaces separating phases, e.g. the core and the crust, within compact stars. We exemplify the relevance and non-triviality of this treatment in the simplest case of an incompressible star, in constant pressure phase transitions, and in the case of strange quark stars with crust.

Jonas P. Pereira; Jaziel G. Coelho; Jorge A. Rueda

2015-01-05T23:59:59.000Z

497

Compact Refractive Imaging Spectrometer Designs Utilizing Immersed Gratings  

DOE Patents [OSTI]

A compact imaging spectrometer comprising an entrance slit for directing light, a first means for receiving the light and focusing the light, an immersed diffraction grating that receives the light from the first means and defracts the light, a second means for receiving the light from the immersed diffraction grating and focusing the light, and an image plane that receives the light from the second means

Lerner, Scott A. (Livermore, CA); Bennett, Charles L. (Livermore, CA); Bixler, Jay V. (Oakland, CA); Kuzmenko, Paul J. (Livermore, CA); Lewis, Isabella T. (San Jose, CA)

2005-07-26T23:59:59.000Z

498

Microscopic analysis of irradiated AGR-1 coated particle fuel compacts  

SciTech Connect (OSTI)

The AGR-1 experiment involved irradiation of 72 TRISO-coated particle fuel compacts to a peak compact-average burnup of 19.5% FIMA with no in-pile failures observed out of 3 x 105 total particles. Irradiated AGR-1 fuel compacts have been cross-sectioned and analyzed with optical microscopy to characterize kernel, buffer, and coating behavior. Six compacts have been examined, spanning a range of irradiation conditions (burnup, fast fluence, and irradiation temperature) and including all four TRISO coating variations irradiated in the AGR-1 experiment. The cylindrical specimens were sectioned both transversely and longitudinally, then polished to expose from 36 to 79 individual particles near midplane on each mount. The analysis focused primarily on kernel swelling and porosity, buffer densification and fracturing, buffer–IPyC debonding, and fractures in the IPyC and SiC layers. Characteristic morphologies have been identified, 981 particles have been classified, and spatial distributions of particle types have been mapped. No significant spatial patterns were discovered in these cross sections. However, some trends were found between morphological types and certain behavioral aspects. Buffer fractures were found in 23% of the particles, and these fractures often resulted in unconstrained kernel protrusion into the open cavities. Fractured buffers and buffers that stayed bonded to IPyC layers appear related to larger pore size in kernels. Buffer–IPyC interface integrity evidently factored into initiation of rare IPyC fractures. Fractures through part of the SiC layer were found in only four classified particles, all in conjunction with IPyC–SiC debonding. Compiled results suggest that the deliberate coating fabrication variations influenced the frequencies of IPyC fractures and IPyC–SiC debonds.

Scott A. Ploger; Paul A. Demkowicz; John D. Hunn; Jay S. Kehn

2014-05-01T23:59:59.000Z

499

On a -ideal of compact sets Tamas Matrai,a  

E-Print Network [OSTI]

subsets of 2 and prove that it is not Tukey reducible to the ideal I1/n = {H : hH 1/h , Tukey reducibility 2000 MSC: 03E15, 54H05, 28A05 1. Complexity of -ideals of compact sets Let X". The notion of complexity we are concerned with in the present note is Tukey reducibility, i.e. the comparison

Mátrai, Tamás

500

A novel technique for the production of cool colored concrete tile and  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

A novel technique for the production of cool colored concrete tile and A novel technique for the production of cool colored concrete tile and asphalt shingle roofing products Title A novel technique for the production of cool colored concrete tile and asphalt shingle roofing products Publication Type Journal Article Year of Publication 2010 Authors Levinson, Ronnen M., Hashem Akbari, Paul Berdahl, Kurt Wood, Wayne Skilton, and Jerry Petersheim Journal Solar Energy Materials and Solar Cells Volume 94 Start Page 946 Issue 6 Pagination 946-954 Date Published 06/2010 Keywords asphalt shingle, concrete tile, Cool colored roof, Cool Colored Roofs, cool roofs, Heat Island, Polyvinylidene fluoride, Solar reflectance, surface roughness Abstract The widespread use of solar-reflective roofing materials can save energy, mitigate urban heat islands and slow global warming by cooling the roughly 20% of the urban surface that is roofed. In this study we created prototype solar-reflective nonwhite concrete tile and asphalt shingle roofing materials using a two-layer spray coating process intended to maximize both solar reflectance and factory-line throughput. Each layer is a thin, quick-drying, pigmented latex paint based on either acrylic or a poly(vinylidene fluoride)/acrylic blend. The first layer is a titanium dioxide rutile white basecoat that increases the solar reflectance of a gray-cement concrete tile from 0.18 to 0.79, and that of a shingle surfaced with bare granules from 0.06 to 0.62. The second layer is a "cool" color topcoat with weak near-infrared (NIR) absorption and/or strong NIR backscattering. Each layer dries within seconds, potentially allowing a factory line to pass first under the white spray, then under the color spray.