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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

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

2

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

3

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

4

Disk-shaped Compact Tension Test for Asphalt Concrete Fracture  

E-Print Network [OSTI]

Disk-shaped Compact Tension Test for Asphalt Concrete Fracture by M.P.Wagoner, W.G. Buttlar and G geometry is the ability to test cylindrical cores obtained from in-place asphalt concrete pavements finalizing the specimen geometry, a typical asphalt concrete surface mixture was tested at various

Paulino, Glaucio H.

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

Disk-shaped Compact Tension Test for Plain Concrete A. Amirkhanian1  

E-Print Network [OSTI]

Disk-shaped Compact Tension Test for Plain Concrete A. Amirkhanian1 , D. Spring1 , J. Roesler1 , K cracking prediction of concrete pavement systems. The single-edge notched beam test has been used energy in asphalt concrete using the disk-shaped compact tension (DCT) test. The benefit of this specimen

Paulino, Glaucio H.

9

Gurson's plasticity coupled to damage as a CAP model for concrete compaction in dynamics  

E-Print Network [OSTI]

1 Gurson's plasticity coupled to damage as a CAP model for concrete compaction in dynamics Fabrice (compaction) but also the plastic strains in compression and cracking in tension. Recently, new dynamic is generally described by means of the plasticity theory where the spherical and the deviatoric responses

10

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

11

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

12

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

13

Compact  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New SubstationCleanCommunity Involvement and Making aCompact soft x-ray multichord

14

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...

15

Rolling, Rolling, Rolling: Roller Window Shades | Department...  

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

anyway, even if our windows were of the highest efficiency. One of my colleagues in a solar energy group I belonged to was a distributor of a high R-value quilted roller window...

16

Phyllosilicate orientation demonstrates early timing of compactional stabilization in calcite-cemented concretions in the Barnett Shale (Late Mississippian), Fort Worth  

E-Print Network [OSTI]

-cemented concretions in the Barnett Shale (Late Mississippian), Fort Worth Basin, Texas (U.S.A) Ruarri J. Day-Stirrat a in revised form 8 April 2008 Accepted 16 April 2008 Keywords: Barnett Shale Goniometry Concretions Fabric Calcite-cemented zones in the prolific gas-producing Barnett Shale (Ft. Worth Basin, Texas) preserve very

17

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

18

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...

19

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

20

Analysis of Process Variable Effects on the Roller Imprinting Process  

E-Print Network [OSTI]

of metal forming processes,” Computers and Structures, Vol.2006). “A roller embossing process for rapid fabrication ofdesign of industrial forging processes,” Journal of Material

Vijayaraghavan, Athulan; Hayse-Gregson, Stuart; Valdez, Rodolfo; Dornfeld, David

2008-01-01T23:59:59.000Z

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.


21

Performance of Integrated Systems of Automated Roller Shade Systems and Daylight Responsive Dimming Systems  

E-Print Network [OSTI]

Roller Shade Systems and Daylight Responsive Dimming SystemsRoller Shade Systems and Daylight Responsive Dimming SystemsBerkeley, CA 94720 Abstract Daylight responsive dimming

Park, Byoung-Chul

2011-01-01T23:59:59.000Z

22

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...

23

Evaluation of the effects of crumb rubber and SBR on rutting resistance of asphalt concrete  

SciTech Connect (OSTI)

This paper presents the results of a study to evaluate the effects of addition of crumb rubber (CR) and styrene-butadiene rubber (SBR) on the rutting resistance of asphalt concrete. These two additives were blended with an AC-20 and an AC-30 grade asphalt cements at different levels of concentrations. These modified and unmodified asphalt blends were tested at intermediate and high temperatures to evaluate their rutting resistance characteristics. They were also used to make Florida type S-I structural surface mixtures. These mixtures were made into Marshall-size specimens by using Gyratory Testing Machine (GTM) equipped with air-roller to compact and density to three compaction levels which simulate three different conditions in the pavement. The FDOT`s (Florida Department of Transportation) Loaded Wheel Tester was also used to evaluate the rutting resistance of these asphalt mixtures. The test results indicate that the modified asphalt mixtures show relatively better rutting resistance and shear resistance as compared with the unmodified asphalt mixtures.

Shih, Chuang-Tsair; Tia, Mang; Ruth, B.E. [Univ. of Florida, Gainesville, FL (United States)

1996-12-31T23:59:59.000Z

24

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

25

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

26

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

27

And maybe that's feminist in a way?: Feminisms and Feminist Identity in Women's Flat Track Roller Derby Revival  

E-Print Network [OSTI]

, the rink filled with the sound of plastic slamming against polished concrete, and they slid to a halt while simultaneously turning to face the commotion. “Gauze! Ice!” Coaches rushed to the jammer, with a first aid kit and a bag of ice. From where I... for women are not unique (consider women’s rugby or women’s ice hockey), roller derby is uniquely a full-contact sport created by women and only for women without being duplicated from an existing all- or mostly-male sport. The revival project began...

Glorioso, Michelle

2011-05-31T23:59:59.000Z

28

Engine testing of ceramic cam-roller followers  

SciTech Connect (OSTI)

For several years, DDC has been developing monolithic ceramic heat engine components. One of the components, developed for an application in our state-of-the-art on-highway, heavy-duty diesel engine, the Series 60, is a silicon nitride cam-roller follower. Prior to starting this program, each valve train component in the Series 60 was considered for conversion to a ceramic material. Many advantages and disadvantages (benefits and risks) were considered. From this effort, one component was selected, the cam-roller follower. Using a system design approach, a ceramic cam-roller follower offered functional improvement at a reasonable cost. The purpose of the project was to inspect and test 100 domestically produced silicon nitride cam-roller followers built to the requirements of the DDC series 60 engine.

Kalish, Y. (Detroit Diesel Corp., MI (United States))

1992-04-01T23:59:59.000Z

29

Engine testing of ceramic cam-roller followers. Final report  

SciTech Connect (OSTI)

For several years, DDC has been developing monolithic ceramic heat engine components. One of the components, developed for an application in our state-of-the-art on-highway, heavy-duty diesel engine, the Series 60, is a silicon nitride cam-roller follower. Prior to starting this program, each valve train component in the Series 60 was considered for conversion to a ceramic material. Many advantages and disadvantages (benefits and risks) were considered. From this effort, one component was selected, the cam-roller follower. Using a system design approach, a ceramic cam-roller follower offered functional improvement at a reasonable cost. The purpose of the project was to inspect and test 100 domestically produced silicon nitride cam-roller followers built to the requirements of the DDC series 60 engine.

Kalish, Y. [Detroit Diesel Corp., MI (United States)

1992-04-01T23:59:59.000Z

30

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

31

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

32

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

33

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

34

Concrete Domains   

E-Print Network [OSTI]

This paper introduces the theory of a particular kind of computation domains called concrete domains. The purpose of this theory is to find a satisfactory framework for the notions of coroutine computation and sequentiality ...

Kahn, Gilles; Plotkin, Gordon

1993-01-01T23:59:59.000Z

35

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...

36

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...

37

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...

38

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

39

A testing technique for concrete under confinement at high rates of strain P. Forquin1,  

E-Print Network [OSTI]

1 A testing technique for concrete under confinement at high rates of strain P. Forquin1, , F://lmsX.polytechnique.fr/LMSX/ Abstract: A testing device is presented for the experimental study of dynamic compaction of concrete under numerical simulations of tests involving a set of 4 different concrete-like behaviours and different

40

Pin and roller attachment system for ceramic blades  

DOE Patents [OSTI]

In a turbine, a plurality of blades are attached to a turbine wheel by way of a plurality of joints which form a rolling contact between the blades and the turbine wheel. Each joint includes a pin and a pair of rollers to provide rolling contact between the pin and an adjacent pair of blades. Because of this rolling contact, high stress scuffing between the blades and the turbine wheel reduced, thereby inhibiting catastrophic failure of the blade joints.

Shaffer, James E. (Maitland, FL)

1995-01-01T23:59:59.000Z

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.


41

Pin and roller attachment system for ceramic blades  

DOE Patents [OSTI]

In a turbine, a plurality of blades are attached to a turbine wheel by way of a plurality of joints which form a rolling contact between the blades and the turbine wheel. Each joint includes a pin and a pair of rollers to provide rolling contact between the pin and an adjacent pair of blades. Because of this rolling contact, high stress scuffing between the blades and the turbine wheel reduced, thereby inhibiting catastrophic failure of the blade joints. 3 figs.

Shaffer, J.E.

1995-07-25T23:59:59.000Z

42

Concrete Pavement Surface Characteristics  

E-Print Network [OSTI]

, Broom, Belt, Carpet) Shot Peened Exposed Aggregate Porous (Pervious) Concrete Milled HMA and SurfaceImproving Concrete Pavement Surface Characteristics Pooled Fund TPF-5(139) National Concrete do with this knowledge? #12;Better Design and Construction Practices for Texturing Concrete Pavement

43

Municipal Solid Waste as an Energy Source by Roller-Grate Incineration  

E-Print Network [OSTI]

The Grumman/VKW (Duesseldorf) Roller-Grate System was developed specifically to mass-burn municipal solid wastes achieving efficient combustion by a rolling and mixing action of the fuel bed, and independent control of primary air and roller speed...

Karnoski, P. J.

1979-01-01T23:59:59.000Z

44

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

45

Concrete Material Models Concrete_1: Concrete Model with No Tensile Strength  

E-Print Network [OSTI]

Concrete Material Models Concrete_1: Concrete Model with No Tensile Strength INPUT Concrete_1, matID ¢f fc cu u, , ,e e0 Definitions (Fig. 1): fc : concrete compressive strength at 28 days (compression is negative) A0 : concrete strain at maximum strength (compression is negative) fcu : concrete crushing

Filippou, Filip C.

46

MHK Technologies/Wave Roller | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision hasInformation Earth's Heat JumpIncMAKGalway Bay IEOWCCatcher.png TechnologyRoller < MHK

47

Insulating polymer concrete  

DOE Patents [OSTI]

A lightweight insulating polymer concrete formed from a lightweight closed cell aggregate and a water resistance polymeric binder.

Schorr, H. Peter (Douglaston, NY); Fontana, Jack J. (Shirley, NY); Steinberg, Meyer (Melville, NY)

1987-01-01T23:59:59.000Z

48

E-Print Network 3.0 - atd roller bearing Sample Search Results  

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

roller bearing Page: << < 1 2 3 4 5 > >> 1 The Rail Technology Unit Validation of a Matlab Railway Vehicle Simulation Summary: The Rail Technology Unit Validation of a Matlab...

49

National Concrete Pavement Technology Center  

E-Print Network [OSTI]

.5 " concrete overlay with 1" asphalt interlayer (non porous surface mix) ·Pours- one 22' pass and one 16' ftNational Concrete Pavement Technology Center Concrete Overlay Technology TTCC/NC2 Meeting Savannah patches in 2008 Shortcut (2) to CD Drive.lnk #12;Need to Move Concrete Overlays Forward Concrete Overlay

50

Sonar probing of concrete  

E-Print Network [OSTI]

ABSTRACT Sonar Probing of Concrete (May 1988) John H. Mims, B. A. , Carleton College Chairman of Advisory Committee: Dr. Robert R, Unterberger Two systems were used for acoustical tests at concrete dams. The first system used a pair of donated... reflections from several concrete-air interfaces at the Norfork Dam, Arkansas. A reflection between two walls in the dam's operating gallery which were 6. 73 m apart was recorded at 3. 4 ms (peak value). After subtracting the appropriate delays, this value...

Mims, John Hornsby

1988-01-01T23:59:59.000Z

51

Concrete chemistry: Chemical admixtures, sprayed concrete, concrete binders and current R&D  

E-Print Network [OSTI]

Concrete chemistry: Chemical admixtures, sprayed concrete, concrete binders and current R&D Dr Roar Myrdal, R&D Director Construction Chemicals, Normet International Ltd. Adjunct Prof. Concrete Technology ­ School of Engineering ABSTRACT A short overview of chemical admixtures for concrete ­ types and how

Davies, Christopher

52

Strict $\\infty $-categories. Concrete Duality  

E-Print Network [OSTI]

An elementary theory of strict $\\infty $-categories with application to concrete duality is given. New examples of first and second order concrete duality are presented.

G. V. Kondratiev

2006-08-17T23:59:59.000Z

53

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

54

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

55

DIVISON 03 CONCRETE 03300 CAST-IN-PLACE CONCRETE  

E-Print Network [OSTI]

-IN-PLACE CONCRETE A. Design Considerations 1. Testing and inspection will be required for cast-in-place concrete of the Building Code. All testing and inspection of concrete work will be contracted for and paid for directly by the University, regardless of building class. The A/E must specify all testing and inspection of concrete work

56

Electrokinetic decontamination of concrete  

SciTech Connect (OSTI)

ELECTROSORB Electrokinetic Extraction Technology, developed by ISOTRON Corp., offers a cost-effective approach to treating contaminated concrete. Heavy metals/radionuclides trapped in concrete can be extracted using this process if they are chemically solubilized; solubilizers used are citric acid alone and a mixture of citric and nitric acids. A DC electric field is applied across the contaminated concrete to electrokinetically transport the solubilized contaminants from the concrete pores to a collector on the concrete surface. The collector is an extraction pad laid on the surface. The pad provides confinement for a planar electrode and solubilizer solution; it is operated under a vacuum to hold the pad against the concrete surface. Operation requires little attendance, reducing the workers` health hazards. The process incorporates a mechanism for recycling the solubilizer solution. A field demonstration of the process took place in Building 21 of DOE`s Mound facility in Miamisburg, OH, over 12 days in June 1996. The thorium species present in this building`s concrete floors included ThO{sub 2} and thorium oxalate. The nitric acid was found to facilitate Th extraction.

Lomasney, H.L.; SenGupta, A.K.; Yachmenev, V.

1996-12-31T23:59:59.000Z

57

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

58

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

59

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

60

Pervasive liquid metal based direct writing electronics with roller-ball pen  

SciTech Connect (OSTI)

A roller-ball pen enabled direct writing electronics via room temperature liquid metal ink was proposed. With the rolling to print mechanism, the metallic inks were smoothly written on flexible polymer substrate to form conductive tracks and electronic devices. The contact angle analyzer and scanning electron microscope were implemented to disclose several unique inner properties of the obtained electronics. An ever high writing resolution with line width and thickness as 200 ?m and 80 ?m, respectively was realized. Further, with the administration of external writing pressure, GaIn{sub 24.5} droplets embody increasing wettability on polymer which demonstrates the pervasive adaptability of the roller-ball pen electronics.

Zheng, Yi; Zhang, Qin [Beijing Key Lab of CryoBiomedical Eng. and Key Lab of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)] [Beijing Key Lab of CryoBiomedical Eng. and Key Lab of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); Liu, Jing, E-mail: jliu@mail.ipc.ac.cn [Beijing Key Lab of CryoBiomedical Eng. and Key Lab of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China) [Beijing Key Lab of CryoBiomedical Eng. and Key Lab of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing 100084 (China)

2013-11-15T23:59:59.000Z

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.


61

Seismic demands in precast concrete diaphragms  

E-Print Network [OSTI]

Reinforced and Prestressed Concrete Walls. ” Journal ofPrestressed and Precast Concrete Structures. ” PCI Journal ,methodology for precast concrete diaphragms part 2: Research

Schoettler, Matthew John

2010-01-01T23:59:59.000Z

62

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

63

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...

64

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

65

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.

66

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.

67

Sustainability of Concrete forSustainability of Concrete for Infrastructure  

E-Print Network [OSTI]

Sustainability of Concrete forSustainability of Concrete for Infrastructure Dr. Jason H. Ideker limits sustainability in concrete materials? ­ Degradation: Alkali-silica reaction ­ Environmental for infrastructure rehabilitation and rapid repair ­ Instrumentation and monitoring to track performance · Testing

Bertini, Robert L.

68

Magnetic Resonance Imaging of concrete  

E-Print Network [OSTI]

velocity · Relates Elastic modulus to speed of sound Assumes Concrete heterogeneous Can be affected by steel Modulus related to speed of sound Strength of concrete related to modulus Location of flaws structure · In both cases procedure is destructive Systems to monitor concrete modulus · Ultra-sonic pulse

Burgoyne, Chris

69

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

70

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

71

High temperature polymer concrete  

DOE Patents [OSTI]

This invention is concerned with a polymer concrete composition, which is a two-component composition useful with many bases including metal. Component A, the aggregate composition, is broadly composed of silica, silica flour, portland cement, and acrylamide, whereas Component B, which is primarily vinyl and acrylyl reactive monomers, is a liquid system.

Fontana, J.J.; Reams, W.

1984-05-29T23:59:59.000Z

72

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

73

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

E-Print Network [OSTI]

Foam-protected reinforced concrete structures under impact:and Repair of Reinforced Concrete with Carbon Overlays."Polymer Reinforcement for Concrete Structures (FRPRCS-08),

Oesterle, Michael G.

2009-01-01T23:59:59.000Z

74

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

75

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

E-Print Network [OSTI]

suited for testing reinforced concrete and concrete masonrytesting on mitigation strategies of reinforced concrete andConcrete Masonry Unit COR Coefficient of Restitution DIF Dynamic Increase Factor EMRTC Energetic Materials Research and Testing

Oesterle, Michael G.

2009-01-01T23:59:59.000Z

76

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...

77

Canadian River Compact (Texas)  

Broader source: Energy.gov [DOE]

The Canadian River Commission administers the Canadian River Compact which includes the states of New Mexico, Oklahoma, and Texas. Signed in 1950 by the member states, the Compact was subsequently...

78

NSTX LTXPEGASUS Compact CTF  

E-Print Network [OSTI]

isotope retention. ST-CTF Compact ST-CTF at ~ 10 MA range provide a compact nuclear component test to NSTX. Large vacuum vessel, no stabilizing plates, excellent set of profile and boundary diagnostics

Princeton Plasma Physics Laboratory

79

WIRELESS SENSORS EMBEDDED IN CONCRETE Amal Abbadi  

E-Print Network [OSTI]

WIRELESS SENSORS EMBEDDED IN CONCRETE Amal Abbadi 1 Phd Student, IRCICA, IEMN, Université Lille1 antennas with concrete are investigated at 860MHz. Simulations for different cases (different concrete are presented. KEYWORDS : Wireless sensor networks, concrete attenuation, embedded antenna, concrete

Paris-Sud XI, Université de

80

Preferred orientation of ettringite in concrete fractures  

E-Print Network [OSTI]

Z. (1988). Cement and Concrete Research , 18 , 823-829.R. (2006). Cement and Concrete Research 36 , 364-370.P.K. & Monteiro, P.J.M. (2006). Concrete. Microstructure,

Wenk, Hans-Rudolf

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

Seismic demands in precast concrete diaphragms  

E-Print Network [OSTI]

2004). “Load testing of a Precast Concrete Double-Tee FlangeStructural Testing, SP 211-8, American Concrete Institute,shake table testing of a precast concrete building, was

Schoettler, Matthew John

2010-01-01T23:59:59.000Z

82

Asphalt and Asphaltic Concrete  

E-Print Network [OSTI]

, and combined curb and gutter furnished and set, the rate for resetting old curbing; the rate per cubic yard for extra concrete, if any is used; the price per cubic yard for broken stone or gravel; the rate per square yard for paving and for relaying old...- tified and given access to the same at least ten days be- fore it is required for use, and any work in which re- jected cement was used will be rejected altogether. 5. The cement shall be packed in strong bags having printed on the outside the brand...

Young, A. R.

1914-05-01T23:59:59.000Z

83

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

84

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

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

CRAD, Nuclear Facility Construction - Structural Concrete, May 29, 2009 CRAD, Nuclear Facility Construction - Structural Concrete, May 29, 2009 May 29, 2009 Nuclear Facility...

85

DATABASE FOR PREMATURE CONCRETE DETERIORATION  

E-Print Network [OSTI]

0-4085-P3 DATABASE FOR PREMATURE CONCRETE DETERIORATION Author: Kevin J. Folliard Project 0. This product presents the architecture for a database to collect relevant information on materials and mixture in developing and populating various materials- and structures-specific databases for both new concrete

Texas at Austin, University of

86

THE JAPAN PRESSS PRECAST CONCRETE  

E-Print Network [OSTI]

Properties Demand performance Strong Connec- tion Outside of plastic hinge yield stiffness equivalent yield located at plastic hinges are allowed by emu- lating cast-in-place concrete connections. #12;5 DESIGN-in-place concrete #12;7 PERFORMANCE DEMAND TO CONNECTIONS: Seismic Load : Performance-based Approach Load Members

Shiohara, Hitoshi

87

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.

88

Nuclear Power Plant Concrete Structures  

SciTech Connect (OSTI)

A nuclear power plant (NPP) involves complex engineering structures that are significant items of the structures, systems and components (SSC) important to the safe and reliable operation of the NPP. Concrete is the commonly used civil engineering construction material in the nuclear industry because of a number of advantageous properties. The NPP concrete structures underwent a great degree of evolution, since the commissioning of first NPP in early 1960. The increasing concern with time related to safety of the public and environment, and degradation of concrete structures due to ageing related phenomena are the driving forces for such evolution. The concrete technology underwent rapid development with the advent of chemical admixtures of plasticizer/super plasticizer category as well as viscosity modifiers and mineral admixtures like fly ash and silica fume. Application of high performance concrete (HPC) developed with chemical and mineral admixtures has been witnessed in the construction of NPP structures. Along with the beneficial effect, the use of admixtures in concrete has posed a number of challenges as well in design and construction. This along with the prospect of continuing operation beyond design life, especially after 60 years, the impact of extreme natural events ( as in the case of Fukushima NPP accident) and human induced events (e.g. commercial aircraft crash like the event of September 11th 2001) has led to further development in the area of NPP concrete structures. The present paper aims at providing an account of evolution of NPP concrete structures in last two decades by summarizing the development in the areas of concrete technology, design methodology and construction techniques, maintenance and ageing management of concrete structures.

Basu, Prabir [International Atomic Energy Agency (IAEA)] [International Atomic Energy Agency (IAEA); Labbe, Pierre [Electricity of France (EDF)] [Electricity of France (EDF); Naus, Dan [Oak Ridge National Laboratory (ORNL)] [Oak Ridge National Laboratory (ORNL)

2013-01-01T23:59:59.000Z

89

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

90

Flaw-detection characteristics of the compact MIB-4 betatron  

SciTech Connect (OSTI)

The compact pulse betatron using electrons accelerated to an energy of up to 4 MeV (MIB-4) is designed for the radiographic inspection of reinforced-concrete structures and buildings, welded joints, various materials, and assemblies. Information which refines and complements the method of inspecting parts by means of the MIB-4 device is provided. The results obtained in testing this equipment abroad are given.

Boiko, D.A.; Filimonov, A.A.; Chakhlov, V.L.

1987-09-01T23:59:59.000Z

91

Interstate Mining Compact (Maryland)  

Broader source: Energy.gov [DOE]

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...

92

Reasoning with Concrete Domains Carsten Lutz  

E-Print Network [OSTI]

Reasoning with Concrete Domains Carsten Lutz RWTH Aachen, LuFg Theoretical Computer Science. Concrete domains allow the integration of description logic reasoning with reasoning about concrete objects for building real­world applications, is widely accepted. How­ ever, the complexity of reasoning with concrete

Lutz, Carsten

93

NCC Technical Training Opportunity in Concrete  

E-Print Network [OSTI]

NCC Technical Training Opportunity in Concrete Pavement Technology National Concrete Consortium training through the National Concrete Pavement Technology Center (CP Tech Center). · Michigan Tech for Concrete Pavement: You may select specific subjects within the manual for emphasis if that is of interest

94

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

95

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

96

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

97

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

98

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

99

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

100

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

1990-03-13T23:59:59.000Z

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

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

102

Laboratory compaction of cohesionless sands  

E-Print Network [OSTI]

on the maximum dry unit weight during compaction. Three different laboratory compaction methods were used: 1) Standard Proctor', 2) Modified Proctor; and 3) Vibrating hammer. The effects of the grain size distribution, particle shape and laboratory compaction...

Delphia, John Girard

1998-01-01T23:59:59.000Z

103

Seismic design, testing and analysis of reinforced concrete wall buildings  

E-Print Network [OSTI]

of Slender Reinforced Concrete Walls”. Structural Journal,T. (1975). “Reinforced Concrete Structures”. John Wiley &Design of Reinforced Concrete and Masonry Buildings”. John

Panagiotou, Marios

2008-01-01T23:59:59.000Z

104

Nonlinear seismic response analysis of steel-concrete composite frames  

E-Print Network [OSTI]

formulation of nonlinear steel- concrete composite beam ele-Behaviour of Composite Steel and Concrete Struc- turalE. (2001). “Analysis of steel-concrete composite frames with

Barbato, Michele

2008-01-01T23:59:59.000Z

105

Reliability based assessment of FRP rehabilitation of reinforced concrete girders  

E-Print Network [OSTI]

Polymer Reinforcing Bars in Concrete Environment. 2002 ,Corrosion of Steel in Concrete; Wiley-VCH: Weinheim, 2004.Mitchell, D. Prestressed Concrete Structures; Prentice Hall:

Wilcox, Patrick Carlo

2008-01-01T23:59:59.000Z

106

Seismic design, testing and analysis of reinforced concrete wall buildings  

E-Print Network [OSTI]

based on the material testing data of concrete cylinders inDESIGN, TESTING AND ANALYSIS OF REINFORCED CONCRETE WALLDESIGN, TESTING AND ANALYSIS OF REINFORCED CONCRETE WALL

Panagiotou, Marios

2008-01-01T23:59:59.000Z

107

Large-Scale Testing of Steel-Reinforced Concrete (SRC) Coupling Beams Embedded into Reinforced Concrete Structural Walls  

E-Print Network [OSTI]

Concrete Cylinder Testing the latter stages of testing, concrete spalling was observedObtained from Concrete Cylinder Testing f' c,test (ksi) ? 0,

Motter, Christopher John

2014-01-01T23:59:59.000Z

108

Compact microchannel system  

DOE Patents [OSTI]

The present invention provides compact geometries for the layout of microchannel columns through the use of turns and straight channel segments. These compact geometries permit the use of long separation or reaction columns on a small microchannel substrate or, equivalently, permit columns of a fixed length to occupy a smaller substrate area. The new geometries are based in part on mathematical analyses that provide the minimum turn radius for which column performance in not degraded. In particular, we find that straight channel segments of sufficient length reduce the required minimum turn radius, enabling compact channel layout when turns and straight segments are combined. The compact geometries are obtained by using turns and straight segments in overlapped or nested arrangements to form pleated or coiled columns.

Griffiths, Stewart

2003-09-30T23:59:59.000Z

109

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

110

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 presented in this work explored the possibilities of prestressing thin sheet glass concrete products

Meyer, Christian

111

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

112

The behaviour of concrete structures in fire   

E-Print Network [OSTI]

The nature of concrete-based structures means that they generally perform very well in fire. However, concrete is a complex material and its properties can change dramatically when exposed to high temperatures. This paper provides a ‘state...

Fletcher, Ian A; Welch, Stephen; Torero, Jose L; Carvel, Ricky O; Usmani, Asif

2007-03-29T23:59:59.000Z

113

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....

114

PERFORMANCE-RELATED SPECIAL PROVISION FOR HIGH PERFORMANCE CONCRETE MIX DESIGNS FOR CONCRETE SUPERSTRUCTURE (Tollway)  

E-Print Network [OSTI]

PERFORMANCE-RELATED SPECIAL PROVISION FOR HIGH PERFORMANCE CONCRETE MIX DESIGNS FOR CONCRETE of designing and furnishing high performance portland cement concrete for special applications to the decks the Illinois Tollway with a methodology to assure high quality concrete with reduced shrinkage potential, while

115

ACHIEVING "GREEN" CONCRETE THROUGH THE USE OF HIGH PERFORMANCE FIBER REINFORCED CONCRETE  

E-Print Network [OSTI]

, the porous and brittle nature of concrete, when interacting with environmental actions such as weathering1 ACHIEVING "GREEN" CONCRETE THROUGH THE USE OF HIGH PERFORMANCE FIBER REINFORCED CONCRETE Shih-Ho Chao1 , A. M., ASCE ABSTRACT Concrete is one of the most widely used materials for infrastructure all

Chao, Shih-Ho

116

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

E-Print Network [OSTI]

CPI ­ Concrete Plant International ­ 2 | 2013 www.cpi-worldwide.com2 PRECAST CONCRETE ELEMENTS with discrete zones of solid concrete can provide a high degree of structural composite action, but also creates the inner and outer wythes of concrete with a steel truss provides a high degree of com- posite action

117

PCC Mix Designs Using Recycled Concrete  

E-Print Network [OSTI]

PCC Mix Designs Using Recycled Concrete Pavements Mary E. Vancura, Derek Tompkins, & Lev Khazanovich 21st Annual Transportation Research Conference #12;·! Reassessment of recycled concrete aggregate (RCA) use in rigid pavements ·! History of RCA use ·! Characteristics of RCA concrete ·! RCA production

Minnesota, University of

118

Concrete Domains and Nominals United Carlos Areces  

E-Print Network [OSTI]

Concrete Domains and Nominals United Carlos Areces University of Amsterdam The Netherlands carlos(D), the extension of ALC with concrete domains, is known to be PSpace-complete, in this article we show on the concrete domain D used). The proof is by a reduction of a NExpTime-complete variant of the domino problem

Lutz, Carsten

119

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

DOE Patents [OSTI]

A method for producing quick setting concrete is provided comprising hydrng 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, Arun S. (Joliet, IL); Singh, Dileep (Westmont, IL); Pullockaran, Jose D. (Trenton, NJ); Knox, Lerry (Glen Ellyn, IL)

1997-01-01T23:59:59.000Z

120

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

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

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

122

Sabine River Compact (Multiple States)  

Broader source: Energy.gov [DOE]

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

123

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. The information present in the report provides data that (1) measures the effect of concrete wasteform properties likely to influence radionuclide migration; and (2) quantifies the rate of carbonation of concrete materials in a simulated vadose zone repository.

Bovaird, Chase C.; Jansik, Danielle P.; Wellman, Dawn M.; Wood, Marcus I.

2011-09-30T23:59:59.000Z

124

Field drilling tests on improved geothermal unsealed roller-cone bits. Final report  

SciTech Connect (OSTI)

The development and field testing of a 222 mm (8-3/4 inch) unsealed, insert type, medium hard formation, high-temperature bit are described. Increased performance was gained by substituting improved materials in critical bit components. These materials were selected on bases of their high temperature properties, machinability and heat treatment response. Program objectives required that both machining and heat treating could be accomplished with existing rock bit production equipment. Six of the experimental bits were subjected to air drilling at 240/sup 0/C (460/sup 0/F) in Franciscan graywacke at the Geysers (California). Performances compared directly to conventional bits indicate that in-gage drilling time was increased by 70%. All bits at the Geysers are subjected to reaming out-of-gage hole prior to drilling. Under these conditions the experimental bits showed a 30% increase in usable hole drilled, compared with the conventional bits. The materials selected improved roller wear by 200%, friction per wear by 150%, and lug wear by 150%. These tests indicate a potential well cost savings of 4 to 8%. Savings of 12% are considered possible with drilling procedures optimized for the experimental bits.

Hendrickson, R.R.; Jones, A.H.; Winzenried, R.W.; Maish, A.B.

1980-05-01T23:59:59.000Z

125

Compact Spreader Schemes  

SciTech Connect (OSTI)

This paper describes beam distribution schemes adopting a novel implementation based on low amplitude vertical deflections combined with horizontal ones generated by Lambertson-type septum magnets. This scheme offers substantial compactness in the longitudinal layouts of the beam lines and increased flexibility for beam delivery of multiple beam lines on a shot-to-shot basis. Fast kickers (FK) or transverse electric field RF Deflectors (RFD) provide the low amplitude deflections. Initially proposed at the Stanford Linear Accelerator Center (SLAC) as tools for beam diagnostics and more recently adopted for multiline beam pattern schemes, RFDs offer repetition capabilities and a likely better amplitude reproducibility when compared to FKs, which, in turn, offer more modest financial involvements both in construction and operation. Both solutions represent an ideal approach for the design of compact beam distribution systems resulting in space and cost savings while preserving flexibility and beam quality.

Placidi, M.; Jung, J. -Y.; Ratti, A.; Sun, C.

2014-07-25T23:59:59.000Z

126

EFFECTIVE TENSILE STRESS-STRAIN CHARACTERISTICS FOR REINFORCED CONCRETE  

E-Print Network [OSTI]

EFFECTIVE TENSILE STRESS-STRAIN CHARACTERISTICS FOR REINFORCED CONCRETE L. Hwang, Graduate Student of reinforced concrete structures, the concrete continues to contribute to the effective stiffness of structures for reinforced concrete developed for analysis of reinforced and/or prestressed concrete structures. The model

127

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

128

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

129

Concrete Pour in NSLS-II Ring  

ScienceCinema (OSTI)

The mezzanine floor of the ring building tunnel for NSLS-II was completed when the last concrete was placed in February 2011.

Bruno Semon

2013-07-22T23:59:59.000Z

130

Optimization Online - Concrete Structure Design Using Mixed ...  

E-Print Network [OSTI]

Nov 26, 2009 ... Abstract: We present a mixed-integer nonlinear programming (MINLP) formulation to achieve minimum-cost designs for reinforced concrete ...

Andres Guerra

2009-11-26T23:59:59.000Z

131

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

132

Journal of Educational Psychology Applying Grounded Coordination Challenges to Concrete  

E-Print Network [OSTI]

Journal of Educational Psychology Applying Grounded Coordination Challenges to Concrete Learning, M. I. (2013, August 19). Applying Grounded Coordination Challenges to Concrete Learning Materials.1037/a0034098 #12;Applying Grounded Coordination Challenges to Concrete Learning Materials: A Study

133

Integrated Materials and Construction Practices (IMCP) for Concrete Pavement  

E-Print Network [OSTI]

Integrated Materials and Construction Practices (IMCP) for Concrete Pavement Workshop Participant Handbook Prepared for Prepared by Federal Highway Administration National Concrete Pavement Technology and Construction Practices for Concrete Pavements Workshop Participant Handbook--Front Matter i Technical Report

134

High temperature polymer concrete compositions  

DOE Patents [OSTI]

This invention is concerned with a polymer concrete composition, which is a two-component composition useful with many bases including metal. Component A, the aggregate composition, is broadly composed of silica, silica flour, portland cement, and acrylamide, whereas Component B, which is primarily vinyl and acrylyl reactive monomers, is a liquid system. A preferred formulation emphasizing the major necessary components is as follows: ______________________________________ Component A: Silica sand 60-77 wt. % Silica flour 5-10 wt. % Portland cement 15-25 wt. % Acrylamide 1-5 wt. % Component B: Styrene 50-60 wt. % Trimethylolpropane 35-40 wt. % trimethacrylate ______________________________________ and necessary initiators, accelerators, and surfactants.

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

1985-01-01T23:59:59.000Z

135

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

136

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

DOE Patents [OSTI]

A method for producing quick setting concrete is provided comprising mixing 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. 2 figs.

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

1997-04-29T23:59:59.000Z

137

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

138

Semirealism, Concrete Structures and Theory Change Michel Ghins  

E-Print Network [OSTI]

Semirealism, Concrete Structures and Theory Change Michel Ghins Received: 15 November 2012 metaphysics for scientific realism. First, if particulars and laws are concrete structures, namely actual

Chakravartty, Anjan

139

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

140

Comprehensive Database on Concrete Creep and Shrinkage  

E-Print Network [OSTI]

Comprehensive Database on Concrete Creep and Shrinkage Zdenek P. Bazant and Guang-Hua Li Structural Database on Concrete Creep and Shrinkage Zdenek P. Bazant1 and Guang-Hua Li2 Abstract: As a sequel to the first large database created at Northwestern University in 1978, the paper presents a further

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

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

142

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

143

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

144

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

145

Accretion in Compact Binaries  

E-Print Network [OSTI]

Compact binaries have long been a paradigm for accretion theory. Much of our present view of how accretion occurs comes directly from the comparison of theory with observations of these sources. Since theory differs little for other objects such as active galaxies, increasing efforts have recently gone into searching for correspondences in observed behaviour. This chapter aims at giving a concise summary of the field, with particular emphasis on new developments since the previous edition of this book. These developments have been significant. Much of the earlier literature implicitly assumed that accreting binaries were fairly steady sources accreting most of the mass entering their vicinity, often with main-sequence companions, and radiating the resulting accretion luminosity in rough isotropy. We shall see that in reality these assumptions fail for the majority of systems. Most are transient; mass ejection in winds and jets is extremely common; a large (sometimes dominant) fraction of even short-period systems have evolved companions whose structure deviates significantly from the zero-age main sequence; and the radiation pattern of many objects is significantly anisotropic. It is now possible to give a complete characterization of the observed incidence of transient and persistent sources in terms of the disc instability model and formation constraints. X-ray populations in external galaxies, particularly the ultraluminous sources, are revealing important new insights into accretion processes and compact binary evolution.

Andrew R. King

2003-03-26T23:59:59.000Z

146

STRUCTURAL PERFORMANCE OF DEGRADED REINFORCED CONCRETE MEMBERS.  

SciTech Connect (OSTI)

This paper describes the results of a study to evaluate, in probabilistic terms, the effects of age-related degradation on the structural performance of reinforced concrete members at nuclear power plants. The paper focuses on degradation of reinforced concrete flexural members and shear walls due to the loss of steel reinforcing area and loss of concrete area (cracking/spalling). Loss of steel area is typically caused by corrosion while cracking and spalling can be caused by corrosion of reinforcing steel, freeze-thaw, or aggressive chemical attack. Structural performance in the presence of uncertainties is depicted by a fragility (or conditional probability of failure). The effects of degradation on the fragility of reinforced concrete members are calculated to assess the potential significance of various levels of degradation. The fragility modeling procedures applied to degraded concrete members can be used to assess the effects of degradation on plant risk and can lead to the development of probability-based degradation acceptance limits.

Braverman, J.I.; Miller, C.A.; Ellingwood, B.R.; Naus, D.J.; Hofmayer, C.H.; Bezler, P.; Chang, T.Y.

2001-03-22T23:59:59.000Z

147

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...

148

GUTs on Compact Type IIB Orientifolds  

SciTech Connect (OSTI)

We systematically analyze globally consistent SU(5) GUT models on intersecting D7-branes in genuine Calabi-Yau orientifolds with O3- and O7-planes. Beyond the well-known tadpole and K-theory cancellation conditions there exist a number of additional subtle but quite restrictive constraints. For the realization of SU(5) GUTs with gauge symmetry breaking via U(1)Y flux we present two classes of suitable Calabi-Yau manifolds defined via del Pezzo transitions of the elliptically fibred hypersurface P{sub 1,1,1,6,9}[18] and of the Quintic P{sub 1,1,1,1,1}[5], respectively. To define an orientifold projection we classify all involutions on del Pezzo surfaces. We work out the model building prospects of these geometries and present five globally consistent string GUT models in detail, including a 3-generation SU(5) model with no exotics whatsoever. We also realize other phenomenological features such as the 10 10 5{sub H} Yukawa coupling and comment on the possibility of moduli stabilization, where we find an entire new set of so-called swiss-cheese type Calabi-Yau manifolds. It is expected that both the general constrained structure and the concrete models lift to F-theory vacua on compact Calabi-Yau fourfolds.

Blumenhagen, Ralph; /Munich, Max Planck Inst.; Braun, Volker; /Dublin Inst.; Grimm, Thomas W.; /Bonn U.; Weigand, Timo; /SLAC

2008-12-01T23:59:59.000Z

149

Compact acoustic refrigerator  

DOE Patents [OSTI]

A compact acoustic refrigeration system actively cools components, e.g., electrical circuits, in a borehole environment. An acoustic engine includes first thermodynamic elements for generating a standing acoustic wave in a selected medium. An acoustic refrigerator includes second thermodynamic elements located in the standing wave for generating a relatively cold temperature at a first end of the second thermodynamic elements and a relatively hot temperature at a second end of the second thermodynamic elements. A resonator volume cooperates with the first and second thermodynamic elements to support the standing wave. To accommodate the high heat fluxes required for heat transfer to/from the first and second thermodynamic elements, first heat pipes transfer heat from the heat load to the second thermodynamic elements and second heat pipes transfer heat from first and second thermodynamic elements to the borehole environment. 18 figs.

Bennett, G.A.

1992-11-24T23:59:59.000Z

150

Compact acoustic refrigerator  

DOE Patents [OSTI]

A compact acoustic refrigeration system actively cools components, e.g., electrical circuits (22), in a borehole environment. An acoustic engine (12, 14) includes first thermodynamic elements (12) for generating a standing acoustic wave in a selected medium. An acoustic refrigerator (16, 26, 28) includes second thermodynamic elements (16) located in the standing wave for generating a relatively cold temperature at a first end of the second thermodynamic elements (16) and a relatively hot temperature at a second end of the second thermodynamic elements (16). A resonator volume (18) cooperates with the first and second thermodynamic elements (12, 16) to support the standing wave. To accommodate the high heat fluxes required for heat transfer to/from the first and second thermodynamic elements (12, 16), first heat pipes (24, 26) transfer heat from the heat load (22) to the second thermodynamic elements (16) and second heat pipes (28, 32) transfer heat from first and second thermodynamic elements (12, 16) to the borehole environment.

Bennett, Gloria A. (Los Alamos, NM)

1992-01-01T23:59:59.000Z

151

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

152

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

153

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. 26 figs.

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

1992-04-28T23:59:59.000Z

154

Amr Abdelrahman, PhD Professor of Concrete Structures,  

E-Print Network [OSTI]

Amr Abdelrahman, PhD Professor of Concrete Structures, Structural Engineering Dept., Ain Shams Behavior and Design of Reinforced and Prestressed Concrete Structures and Masonry Wall Design. He conducts concrete members and design of prestressed concrete members. He is a member in the Egyptian Code for Design

155

POURED EARTH AS CONCRETE Lionel RONSOUX, Mariette MOEVUS, Yves JORAND,  

E-Print Network [OSTI]

1 POURED EARTH AS CONCRETE Lionel RONSOUX, Mariette MOEVUS, Yves JORAND, Sandrine MAXIMILIEN and Contemporary Architecture Keywords: poured earth, clay concrete, grain packing, clay dispersion Abstract: In order to pour an earthen material in a liquid state, as a concrete, technologies used by concrete

Boyer, Edmond

156

Portland Cement Concrete Pavement Shannon Golden, Alabama DOT  

E-Print Network [OSTI]

Portland Cement Concrete Pavement Shannon Golden, Alabama DOT PORTLAND CEMENT CONCRETE PAVEMENT PROJECT · First in Alabama in more than 25 years! · IM-I059 (342) Etowah County ­ I-59 Concrete Pavement Rehabilitation with Unbonded Concrete Overlay ­ Length: 10.9 miles ­ Thickness: 11.0 to 13.5 inches ­ Volume: 300

157

1 INTRODUCTION 1.1 Textile reinforced concrete  

E-Print Network [OSTI]

1 INTRODUCTION 1.1 Textile reinforced concrete Textile reinforced concrete (TRC) is a new cementi on the funda- mentals of shortcut glass fibre reinforced concrete. In order to increase the effectiveness of the fibres embedded in the concrete matrix, the fibres are aligned in the direction of the tensile stresses

Paris-Sud XI, Université de

158

Model-Driven Analysis and Synthesis of Textual Concrete Syntax  

E-Print Network [OSTI]

Model-Driven Analysis and Synthesis of Textual Concrete Syntax Pierre-Alain Muller1 , Frédéric textual concrete syntaxes with meta-models is still a challenge. Textual concrete syntaxes compilers to generate parsers. Unfortunately, these generated parsers produce concrete syntax trees, leaving

Paris-Sud XI, Université de

159

Center for By-Products Utilization High Durability Concrete Using  

E-Print Network [OSTI]

TESTING · Fresh Concrete Properties ·Unit Weight (ASTM C 138) ·Air Content (ASTM C 237) ·Slump (ASTM C 143Center for By-Products Utilization High Durability Concrete Using High-Carbon Fly Ash and Pulp Mill-Products Utilization Durable Concrete in Northern Climates · Producing durable concrete in a freezing and thawing

Saldin, Dilano

160

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

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

Computers and Concrete, Vol. 3, No. 5 (2006) 313-334 313 Design optimization of reinforced concrete structures  

E-Print Network [OSTI]

Computers and Concrete, Vol. 3, No. 5 (2006) 313-334 313 Design optimization of reinforced concrete formulation aiming to achieve optimal design of reinforced concrete (RC) structures is presented here. Optimal and placing concrete and steel are incorporated as a function of member size using RS Means 2005 cost data

162

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

163

Air leakage of Insulated Concrete Form houses  

E-Print Network [OSTI]

Air leakage has been shown to increase building energy use due to additional heating and cooling loads. Although many construction types have been examined for leakage, an exploration of a large number of Insulated Concrete ...

Durschlag, Hannah (Hanna Rebekah)

2012-01-01T23:59:59.000Z

164

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

165

Compact neutron generator  

DOE Patents [OSTI]

A compact neutron generator has at its outer circumference a toroidal shaped plasma chamber in which a tritium (or other) plasma is generated. A RF antenna is wrapped around the plasma chamber. A plurality of tritium ion beamlets are extracted through spaced extraction apertures of a plasma electrode on the inner surface of the toroidal plasma chamber and directed inwardly toward the center of neutron generator. The beamlets pass through spaced acceleration and focusing electrodes to a neutron generating target at the center of neutron generator. The target is typically made of titanium tubing. Water is flowed through the tubing for cooling. The beam can be pulsed rapidly to achieve ultrashort neutron bursts. The target may be moved rapidly up and down so that the average power deposited on the surface of the target may be kept at a reasonable level. The neutron generator can produce fast neutrons from a T-T reaction which can be used for luggage and cargo interrogation applications. A luggage or cargo inspection system has a pulsed T-T neutron generator or source at the center, surrounded by associated gamma detectors and other components for identifying explosives or other contraband.

Leung, Ka-Ngo; Lou, Tak Pui

2005-03-22T23:59:59.000Z

166

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

167

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

168

Performance of Reinforced Concrete Column Lap Splices  

E-Print Network [OSTI]

PERFORMANCE OF REINFORCED CONCRETE COLUMN LAP SPLICES A Thesis by RYAN ALBERSON 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 August 2009 Major Subject: Civil Engineering PERFORMANCE OF REINFORCED CONCRETE COLUMN LAP SPLICES A Thesis by RYAN ALBERSON Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment...

Alberson, Ryan M.

2010-01-14T23:59:59.000Z

169

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

170

Yellowstone River Compact (North Dakota)  

Broader source: Energy.gov [DOE]

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...

171

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

172

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

173

Life-Cycle Evaluation of Concrete Building Construction as a Strategy for Sustainable Cities  

E-Print Network [OSTI]

of Portland Cement Concrete. P. C. A. [PCA]. Marceau, M.L. ,BIBM) (2009). Sustainable Benefits of Concrete Structures.Brussels, Belgium, European Concrete Platform ASBL ( Bureau

Stadel, Alexander

2013-01-01T23:59:59.000Z

174

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

175

Hybrid Simulation of the Seismic Response of Squat Reinforced Concrete Shear Walls  

E-Print Network [OSTI]

ACI Symposium on Reinforced Concrete Structures in SeismicStudies of Reinforced Concrete Walled Bents under Static2009. Update to ASCE/SEI 41 Concrete Provisions, PEER Report

Whyte, Catherine Alexandra

2012-01-01T23:59:59.000Z

176

Energy Efficiency Improvement and Cost Saving Oportunities for the Concrete Industry  

E-Print Network [OSTI]

Armor. 2010. Sustainable Concrete Plant Guidelines, Pilot-B. Ivery, J. Flaherty. 2004. Concrete Batch Plant Operator.National Ready Mixed Concrete Association Fleet Benchmarking

Kermeli, Katerina

2013-01-01T23:59:59.000Z

177

Reliability-based characterization of prefabricated FRP composites for rehabilitation of concrete structures  

E-Print Network [OSTI]

FRP Strengthening of Reinforced Concrete Structures, Ph.D.for Prestressed Concrete Bridge Girders Strengthened withof Reinforced Normal Weight Concrete Members, Structural

Jin, Sung-Jun

2008-01-01T23:59:59.000Z

178

Experimental damage-gas flow correlations for cyclically loaded reinforced concrete walls  

E-Print Network [OSTI]

vessels. ” Cement and Concrete research, 32, XTRACT (2007).of air permeability in a concrete shear wall subjected tocharacteristics in cracked concrete. ” Nuclear Engineering

Soppe, Travis E.

2009-01-01T23:59:59.000Z

179

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

E-Print Network [OSTI]

2010. Cement and concrete nanoscience and nanotechnology.of 100 Percent Fly Ash Concrete. 2005 World of Coal Ash (carbon dioxide in precast concrete. TECHNOLOGY REVIEW – A

Hasanbeigi, Ali

2013-01-01T23:59:59.000Z

180

Experimental damage-gas flow correlations for cyclically loaded reinforced concrete walls  

E-Print Network [OSTI]

of work focused on testing reinforced concrete panels underof work focused on testing reinforced concrete panels underfocuses on testing nine reinforced concrete wall panels

Soppe, Travis E.

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.


181

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

E-Print Network [OSTI]

J.W. , (2009). Testing and Reinforced Concrete Coupling2010). "Testing and Modeling of Reinforced Concrete Couplingscale testing of four-story reinforced concrete and post-

Tuna, Zeynep

2012-01-01T23:59:59.000Z

182

Instantaneous In-Situ Determination of Water-Cement Ratio of Fresh Concrete  

E-Print Network [OSTI]

microstructure of concrete, and testing methods. Steven D.resistivity; fresh concrete; nondestructive testing; qualityin concrete structures, and nondestructive testing methods.

Mancio, Mauricio; Moore, Jeffrey R.; Brooks, Zenzile; Monteiro, Paulo J. M.; Glaser, Steve D.

2010-01-01T23:59:59.000Z

183

Characterization of Effective Built-in Curling and Concrete Pavement Cracking on the Palmdale Test Sections  

E-Print Network [OSTI]

of Concrete and Implications for Choice of Testing Standard.J. R. Non-Destructive Testing of Concrete Pavements forAsphalt Concrete Accelerated Pavement Testing American

Rao, Shreenath; Roesler, Jeffery R.

2005-01-01T23:59:59.000Z

184

Experimental simulations of explosive loading on structural components : reinforced concrete columns with advanced composite jackets  

E-Print Network [OSTI]

5]. 3.A.4 Material Testing Concrete Concrete cylinders wereConcrete Institute ANFO Ammonium Nitrate and Fuel Oil ASTM ASTM International (American Society for Testing

Rodríguez-Nikl, Tonatiuh

2006-01-01T23:59:59.000Z

185

Improving the design and performance of concrete bridges in seismic regions  

E-Print Network [OSTI]

compression testing for both concrete and grout are listedcompression testing for both concrete and grout are listedcompression testing for both concrete and grout are listed

Tobolski, Matthew Joseph

2010-01-01T23:59:59.000Z

186

Flow conditions of fresh mortar and concrete in different pipes  

SciTech Connect (OSTI)

The variation in fresh concrete flow rate over the pipe cross section was investigated on differently coloured and highly flowable concrete mixes flowing through pipes of different materials (rubber, steel, acryl). First, uncoloured (gray) concrete was poured through the pipe and the pipe blocked. Similar but coloured (black) concrete was then poured into the pipe filled with gray concrete, flowing after the gray concrete for a while before being blocked and hardened. The advance of the colouring along the pipe wall (showing boundary flow rate) was observed on the moulded concrete surface appearing after removing the pipe from the hardened concrete. The shapes of the interfaces between uncoloured and coloured concrete (showing variation of flow rate over the pipe cross section) were observed on sawn surfaces of concrete half cylinders cut along the length axes of the concrete-filled pipe. Flow profiles over the pipe cross section were clearly seen with maximum flow rates near the centre of the pipe and low flow rate at the pipe wall (typically rubber pipe with reference concrete without silica fume and/or stabilizers). More plug-shaped profiles, with long slip layers and less variation of flow rate over the cross section, were also seen (typically in smooth acrylic pipes). Flow rate, amount of concrete sticking to the wall after flow and SEM-images of pipe surface roughness were observed, illustrating the problem of testing full scale pumping.

Jacobsen, Stefan, E-mail: stefan.jacobsen@ntnu.n [Norwegian University of Science and Technology, Dept of Structural Engineering, Trondheim (Norway); Haugan, Lars; Hammer, Tor Arne [SINTEF Byggforsk AS Building and Infrastructure, Trondheim (Norway); Kalogiannidis, Evangelos [Norwegian University of Science and Technology, Dept of Structural Engineering, Trondheim (Norway)

2009-11-15T23:59:59.000Z

187

The implications of compartment fire non-uniformity for the membrane action of reinforced concrete slabs   

E-Print Network [OSTI]

to the complexity of concrete material behaviour and also due to concrete’s reputation of superior fire performance. Concrete technology is, however, continually evolving; structures are increasingly slender, more highly stressed and have higher compressive...

Deeny, Susan

2011-01-01T23:59:59.000Z

188

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

189

TRANSPORT THROUGH CRACKED CONCRETE: LITERATURE REVIEW  

SciTech Connect (OSTI)

Concrete containment structures and cement-based fills and waste forms are used at the Savannah River Site to enhance the performance of shallow land disposal systems designed for containment of low-level radioactive waste. Understanding and measuring transport through cracked concrete is important for describing the initial condition of radioactive waste containment structures at the Savannah River Site (SRS) and for predicting performance of these structures over time. This report transmits the results of a literature review on transport through cracked concrete which was performed by Professor Jason Weiss, Purdue University per SRR0000678 (RFP-RQ00001029-WY). This review complements the NRC-sponsored literature review and assessment of factors relevant to performance of grouted systems for radioactive waste disposal. This review was performed by The Center for Nuclear Waste Regulatory Analyses, San Antonio, TX, and The University of Aberdeen, Aberdeen Scotland and was focused on tank closure. The objective of the literature review on transport through cracked concrete was to identify information in the open literature which can be applied to SRS transport models for cementitious containment structures, fills, and waste forms. In addition, the literature review was intended to: (1) Provide a framework for describing and classifying cracks in containment structures and cementitious materials used in radioactive waste disposal, (2) Document the state of knowledge and research related to transport through cracks in concrete for various exposure conditions, (3) Provide information or methodology for answering several specific questions related to cracking and transport in concrete, and (4) Provide information that can be used to design experiments on transport through cracked samples and actual structures.

Langton, C.

2012-05-11T23:59:59.000Z

190

Concrete material characterization reinforced concrete tank structure Multi-Function Waste Tank Facility  

SciTech Connect (OSTI)

The purpose of this report is to document the Multi-Function Waste Tank Facility (MWTF) Project position on the concrete mechanical properties needed to perform design/analysis calculations for the MWTF secondary concrete structure. This report provides a position on MWTF concrete properties for the Title 1 and Title 2 calculations. The scope of the report is limited to mechanical properties and does not include the thermophysical properties of concrete needed to perform heat transfer calculations. In the 1970`s, a comprehensive series of tests were performed at Construction Technology Laboratories (CTL) on two different Hanford concrete mix designs. Statistical correlations of the CTL data were later generated by Pacific Northwest Laboratories (PNL). These test results and property correlations have been utilized in various design/analysis efforts of Hanford waste tanks. However, due to changes in the concrete design mix and the lower range of MWTF operating temperatures, plus uncertainties in the CTL data and PNL correlations, it was prudent to evaluate the CTL data base and PNL correlations, relative to the MWTF application, and develop a defendable position. The CTL test program for Hanford concrete involved two different mix designs: a 3 kip/in{sup 2} mix and a 4.5 kip/in{sup 2} mix. The proposed 28-day design strength for the MWTF tanks is 5 kip/in{sup 2}. In addition to this design strength difference, there are also differences between the CTL and MWTF mix design details. Also of interest, are the appropriate application of the MWTF concrete properties in performing calculations demonstrating ACI Code compliance. Mix design details and ACI Code issues are addressed in Sections 3.0 and 5.0, respectively. The CTL test program and PNL data correlations focused on a temperature range of 250 to 450 F. The temperature range of interest for the MWTF tank concrete application is 70 to 200 F.

Winkel, B.V.

1995-03-03T23:59:59.000Z

191

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

192

Hybrid Simulation of the Seismic Response of Squat Reinforced Concrete Shear Walls  

E-Print Network [OSTI]

quasi-static reinforced concrete testing protocol from ITGOn the days of testing, three concrete cylinders from the

Whyte, Catherine Alexandra

2012-01-01T23:59:59.000Z

193

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.

194

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...

195

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

196

FRP-to-concrete bond behaviour under high strain rates   

E-Print Network [OSTI]

Fibre reinforced polymer (FRP) composites have been used for strengthening concrete structures since early 1990s. More recently, FRP has been used for retrofitting concrete structures for high energy events such as impact ...

Li, Xiaoqin

2012-06-25T23:59:59.000Z

197

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

198

Evaluation of a microplane model for progressive fracture in concrete  

E-Print Network [OSTI]

). These test results laid the foundation for researchers to attack the problem of modeling concrete subjected to multiaxial stresses. Today, many computer codes exist which can model aspects of the behavior of concrete (Colville and Abbasi 1974; Bazant...

Loper, James Harris

1988-01-01T23:59:59.000Z

199

Lightweight concrete : investigations into the production of natural fiber reinforcement  

E-Print Network [OSTI]

The purpose of this study is to investigate the benefits of adding natural fiber tensile reinforcement to aerated concrete. Concrete is a great composite material which can be created in various proportions and with various ...

Garbis, Leonidia Maria

2013-01-01T23:59:59.000Z

200

Controlling Thermal Properties of Asphalt Concrete and its Multifunctional Applications  

E-Print Network [OSTI]

) by controlling thermal properties of the construction materials. To change thermal properties of asphalt concrete, expanded polypropylene (EPP) pellet and graphite were selected as the additives and mixed into asphalt concrete. Experimental tests are classified...

Shi, Xijun

2014-08-10T23:59:59.000Z

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

Material flow analysis of concrete in the United States  

E-Print Network [OSTI]

Concrete is the second most consumed material in the world after water. Due to the sheer mass of concrete consumed annually and its associated resource and environmental impacts, improving the materials management of ...

Low, Man-Shi

2005-01-01T23:59:59.000Z

202

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

203

Compact accelerator for medical therapy  

DOE Patents [OSTI]

A compact accelerator system having an integrated particle generator-linear accelerator with a compact, small-scale construction capable of producing an energetic (.about.70-250 MeV) proton beam or other nuclei and transporting the beam direction to a medical therapy patient without the need for bending magnets or other hardware often required for remote beam transport. The integrated particle generator-accelerator is actuable as a unitary body on a support structure to enable scanning of a particle beam by direction actuation of the particle generator-accelerator.

Caporaso, George J.; Chen, Yu-Jiuan; Hawkins, Steven A.; Sampayan, Stephen E.; Paul, Arthur C.

2010-05-04T23:59:59.000Z

204

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

205

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

206

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

207

The Transfer of Scientific Principles Using Concrete and Idealized  

E-Print Network [OSTI]

The Transfer of Scientific Principles Using Concrete and Idealized Simulations Robert L. Goldstone the first simulation was manipulated. The elements either remained concrete throughout the simulation, remained idealized, or switched midway into the simulation from concrete to idealized or vice versa

Goldstone, Robert

208

Silica dust control when drilling concrete Page 1 of 2  

E-Print Network [OSTI]

Silica dust control when drilling concrete Page 1 of 2 Drilling into concrete releases a fine sandy and routinely drill into concrete are at risk of developing this disease. Controlling the dust Hammer drills are available with attached dust removal systems. These draw dust from the drill end, down the attachment

Knowles, David William

209

BOND PROPERTIES OF CFCC PRESTRESSING STRANDS IN PRETENSIONED CONCRETE BEAMS  

E-Print Network [OSTI]

BOND PROPERTIES OF CFCC PRESTRESSING STRANDS IN PRETENSIONED CONCRETE BEAMS by Nolan G. Domenico plastic prestressing strands (CFCC) in pretensioned concrete beams. The bond characteristics are examined for 15.2 mm diameter and 12.5 mm diameter seven-wire CFCC strands. Ten prestressed concrete beams

210

The Description Logic ALCN HR+ Extended with Concrete Domains  

E-Print Network [OSTI]

The Description Logic ALCN HR+ Extended with Concrete Domains: A Practically Motivated Approach, role hierarchies, transitively closed roles, generalized concept inclusions, and concrete domains. As in other languages based on concrete domains (e.g. ALC(D)) a so-called ex- istential predicate restriction

Moeller, Ralf

211

Building Cathedrals and Breaking down Reinforced Concrete Walls  

E-Print Network [OSTI]

Building Cathedrals and Breaking down Reinforced Concrete Walls Michel Brou´e Institut Henri distinction between great mathematicians Concrete walls breakers Michel Brou´e (Institut Henri Poincar´e) John Concrete walls breakers Cathedrals builders Michel Brou´e (Institut Henri Poincar´e) John Thompson

Broué, Michel - Institut de Mathématiques de Jussieu, Université Paris 7

212

Adapting Optimization Techniques to Description Logics with Concrete Domains  

E-Print Network [OSTI]

Adapting Optimization Techniques to Description Logics with Concrete Domains Anni-Yasmin Turhan backtracking and model merging can be adapted to description logics with concrete domains. We propose al) a new requirement for concrete domains in order to enable dependency directed backtracking for all clash

Haarslev, Volker

213

Guide to Dowel LoadTransfer Systems for Jointed Concrete  

E-Print Network [OSTI]

Guide to Dowel LoadTransfer Systems for Jointed Concrete Roadway Pavements TECH BRIEF SEPTEMBER 2011 #12;#12;GUIDE TO DOWEL LOAD TRANSFER SYSTEMS FOR JOINTED CONCRETE ROADWAY PAVEMENTS i Technical and Subtitle Guide to Dowel Load Transfer Systems for Jointed Concrete Roadway Pavements 5. Report Date

214

Effects of g Radiation on Fiber-Reinforced Polymer Concrete  

E-Print Network [OSTI]

Effects of g Radiation on Fiber-Reinforced Polymer Concrete Gonzalo Marti´nez-Barrera,1,2 Luis F% of nylon fibers. The fiber-containing polymer concretes (PCs) were subjected to 5, 10, 50, and 100 k Engineers INTRODUCTION AND SCOPE It is well known that polymer concrete (PC) is three to five times stronger

North Texas, University of

215

Designing Precast Concrete Cross Wall Joints Against Progressive Collapse  

E-Print Network [OSTI]

Designing Precast Concrete Cross Wall Joints Against Progressive Collapse Researcher: Mohamad concrete cross wall constructions. Ronan Point Collapse (http://en.wikipedia.org/wiki/Ronan_Point) #12;Due gap is listed as follows: · Limited number of studies for designing precast concrete cross wall

Birmingham, University of

216

Concrete Browsing Of A Graphical Toolkit Library Denys Duchier  

E-Print Network [OSTI]

Concrete Browsing Of A Graphical Toolkit Library Denys Duchier Department of Computer Science and promote reuse. This paper introduces Concrete Browsing as an improved method of consult- ing a graphical library, and Spreading Computation as novel paradigm for search and retrieval. A concrete browser allows

Duchier, Denys

217

From Abstract to Concrete Norms in Agent Institutions  

E-Print Network [OSTI]

From Abstract to Concrete Norms in Agent Institutions Davide Grossi and Frank Dignum Utrecht accounts for how (abstract) norms can be incorporated in the (concrete) procedures constituting. This abstract is organized as follows. In Section 2 we make the problem we are focusing on concrete by means

Dignum, Frank

218

Permeable Interlocking Concrete Pavement (PICP) for Stormwater Management  

E-Print Network [OSTI]

Permeable Interlocking Concrete Pavement (PICP) for Stormwater Management Benefits and Uses Traditional Concrete · Long-term Maintenance Required by Routine Vacuum Sweeping · Sweeping Cost May Be Off-set by Possible Reduction in Deicing Costs · Repairs Can be Made in Freezing Temperatures with Reinstated Concrete

219

Concrete Browsing Of A Graphical Toolkit Library Denys Duchier  

E-Print Network [OSTI]

Concrete Browsing Of A Graphical Toolkit Library Denys Duchier Department of Computer Science and promote reuse. This paper introduces Concrete Browsing as an improved method of consult­ ing a graphical library, and Spreading Computation as novel paradigm for search and retrieval. A concrete browser allows

Duchier, Denys

220

CIVE 452 Spring 1998 Design of Reinforced Concrete Structures  

E-Print Network [OSTI]

CIVE 452 Spring 1998 Design of Reinforced Concrete Structures Instructor: M.O. Eberhard Office: 233 of concrete and steel (CIVE 363). The purpose of the course is to provide seniors with an introduction to the behavior and design of reinforced concrete structures. Course Outline Text Reading 1. Introduction Ch. 1, 2

Eberhard, Marc O.

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

Compressive Strength of Gamma-Irradiated Polymer Concrete  

E-Print Network [OSTI]

Compressive Strength of Gamma-Irradiated Polymer Concrete Gonzalo Marti´nez-Barrera,1,2 Uriel concrete (PC) was developed by using differ- ent concentrations of silica sand as aggregate of Plastics Engineers INTRODUCTION Polymer concrete (PC) is a particulate composite where thermoset resins

North Texas, University of

222

COLORADO DEPARTMENT OF TRANSPORTATION Sustainability of Concrete Pavement  

E-Print Network [OSTI]

COLORADO DEPARTMENT OF TRANSPORTATION Sustainability of Concrete Pavement I-225 - Mississippi to 6 · 2 Mile Reconstruction Existing: · 4 Lane Divided Highway · 8" Concrete Pavement (Recycled on-site) · 4" Asphalt Overlay (Recycled off-site) Project Design: · 6 Lane Divided Highway · 13" Concrete

223

Model coupling friction and adhesion for steel-concrete interfaces  

E-Print Network [OSTI]

Model coupling friction and adhesion for steel- concrete interfaces Michel Raous Laboratoire de: In this paper the interface behaviour between steel and concrete, during pull out tests, is numerically a variable friction coefficient in order to simulate the behaviour of the steel-concrete interface during

Boyer, Edmond

224

The Description Logic ALCNHR + Extended with Concrete Domains  

E-Print Network [OSTI]

The Description Logic ALCNHR + Extended with Concrete Domains: A Practically Motivated Approach restrictions, role hierarchies, transitively closed roles, generalized concept inclusions, and concrete domains. As in other languages based on concrete domains (e.g. ALC(D)) a so­called ex­ istential predicate restriction

Haarslev, Volker

225

Adapting Optimization Techniques to Description Logics with Concrete Domains  

E-Print Network [OSTI]

Adapting Optimization Techniques to Description Logics with Concrete Domains Anni­Yasmin Turhan backtracking and model merging can be adapted to description logics with concrete domains. We propose al) a new requirement for concrete domains in order to enable dependency directed backtracking for all clash

Haarslev, Volker

226

NExpTime-complete Description Logics with Concrete Domains  

E-Print Network [OSTI]

NExpTime-complete Description Logics with Concrete Domains Carsten Lutz LuFG Theoretical Computer Science RWTH Aachen, Germany lutz@cs.rwth-aachen.de Abstract. Concrete domains are an extension \\concrete properties" of objects such as sizes, weights, and durations. It is known that reasoning with ALC

Baader, Franz

227

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 experiments examine the effects of varying the relative concreteness of physics word problems on student performance.Previous studies have found that concrete representations benefit performance for relatively

Heckler, Andrew F.

228

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 four materials: concrete, iron, lead, and water. Unlike previous compilations of albedo data, modern obtained by fits to results of Monte Carlo calculations for concrete,3 and later extended to water, iron

Shultis, J. Kenneth

229

Effects of elevated temperatures on mechanical properties of concrete containing  

E-Print Network [OSTI]

Effects of elevated temperatures on mechanical properties of concrete containing haematite and A. Beycioglu5 Concretes containing different proportions of haematite (15, 30, 45 and 60%) were of concretes were determined according to ASTM C39 and ASTM C469. A rule based Mamdani type fuzzy logic model

North Texas, University of

230

A NOVEL MICROWAVE CAMERA FOR NDE OF CONCRETE STRUCTURES  

E-Print Network [OSTI]

A NOVEL MICROWAVE CAMERA FOR NDE OF CONCRETE STRUCTURES By Maria Q. Feng1 , Yoo Jin Kim2 , Franco De Flaviis3 , and Luis Jofre 4 ABSTRACT: Nondestructive assessment of concrete structures heavily and cracks inside concrete caused by aging, deterioration, and seismic loading. The authors have developed

De Flaviis, Franco

231

NExpTime-complete Description Logics with Concrete Domains  

E-Print Network [OSTI]

that reasoning with the concrete do- main D (i.e., testing the satis#12;ability of #12;nite conjunctionsChapter 1 NExpTime-complete Description Logics with Concrete Domains Carsten Lutz Abstract. Description Logics (DLs) incorporating concrete domains are useful formalisms for integrated reasoning about

Baader, Franz

232

TTUS FP&C Design & Building Standards Division 3 Concrete  

E-Print Network [OSTI]

All concrete products shall be designed, formed, transported, placed, tested, and finished in strict accordance with the American Society for Testing and Materials (ASTM) and the American Concrete Institute, and submit test reports during concrete placement. Page 1 of 4 #12;TTUS FP&C Design & Building

Gelfond, Michael

233

TRNEWS279MARCHAPRIL2012 The authors are Concrete  

E-Print Network [OSTI]

. Most prefer the Standard Test Method for Electrical Indication of Concrete's Ability to Resist Chloride measurements across a wide range of permeability values, sample testing ages, and concrete mix designs (FigureTRNEWS279MARCH­APRIL2012 46 The authors are Concrete Research Engineers, Louisiana Transportation

Harms, Kyle E.

234

SERVICEABILITY LIMIT STATES OF CONCRETE BEAMS PRESTRESSED BY CFRP BARS  

E-Print Network [OSTI]

reinforcements. The experimental program consisted of testing eight concrete beams prestressed by CFRP bars beams prestressed by Leadline CFRP bars were tested, in addition to two concrete beams prestressedAbstract SERVICEABILITY LIMIT STATES OF CONCRETE BEAMS PRESTRESSED BY CFRP BARS by Amr A

235

Experimental and Analytical Reexamination of Classic Concrete Beam Tests  

E-Print Network [OSTI]

Experimental and Analytical Reexamination of Classic Concrete Beam Tests F. J. Vecchio1 and W. Shim CE Database subject headings: Beams; Concrete; Tests; Ductility; Finite elements; Models; Shear paper describing the testing of a series of 12 reinforced concrete beams Bresler and Scordelis 1963

Vecchio, Frank J.

236

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

E-Print Network [OSTI]

of three blocks with two mortar joints and both cells fully16 in. concrete blocks with two mortar joints (Figure 6.21).between the mortar joints and the block were equal to 200

Oesterle, Michael G.

2009-01-01T23:59:59.000Z

237

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

238

Evaluation of mechanical properties of high strength concrete for prestressed concrete bridge design  

E-Print Network [OSTI]

follows that used by the American Concrete Institute (ACI) Committee 363 (1997) as concrete having compressive strength greater than 6000 psi (41. 4 MPa) produced without using exotic materials or techniques. HSC with compressive strengths above 6000... psi (41. 4 MPa) is commonly available today and is used extensively in prestressed bridge girders. However, the current design codes such as the American Association of State Highway and Transportation Officials (AASHTO) Standard Specifications...

Chompreda, Praveen

2001-01-01T23:59:59.000Z

239

INTRODUCTION Portland cement concrete (PCC) is the world's most versatile and utilized construction material. Modern concrete consists of six  

E-Print Network [OSTI]

INTRODUCTION Portland cement concrete (PCC) is the world's most versatile and utilized construction material. Modern concrete consists of six main ingredients: coarse aggregate, sand, portland cement agreement that the use of SCMs has the following effects in concrete: 1. Improved workability and finish

Harms, Kyle E.

240

Morley Symposium on Concrete Plasticity and its Application. University of Cambridge 23 THE PLASTICITY OF UNREINFORCED CONCRETE  

E-Print Network [OSTI]

Morley Symposium on Concrete Plasticity and its Application. University of Cambridge 23 rd July, 2007 THE PLASTICITY OF UNREINFORCED CONCRETE Jacques HEYMAN Department of Engineering, University of Cambridge, UK Keywords: Mass concrete, plasticity 1 THE MATERIAL If a material is to be structurally useful

Burgoyne, Chris

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

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

242

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,...

243

Interstate Oil and Gas Conservation Compact (Maryland)  

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,...

244

Compaction characteristics of crushed limestone using the Gyratory Testing Machine  

E-Print Network [OSTI]

pressure is maintained at each end of the sample by parallel steel plungers. The development of' this compactor involved the mechanizing of the gyratory motion and incorporating a means of automatically control- ling the applied vertical pressure... the operation. Provision is made for three 12 K L Air Oil Roller Assemblies Rotate About This Axis I I Gyratory Notion 8 ' I 4I'~)l 0 Gyration Angle Excess Pore Pressure Develops Gyration Pressure Number of A Nold B Nold Chuck C Lower Roller...

Parsons, Walter Herbert, III

1963-01-01T23:59:59.000Z

245

Compact neutron generator development at LBNL  

E-Print Network [OSTI]

Generator Development at LBNL J. Reijonen, G. English, R.Technology Group in LBNL. The compact axial extraction

2003-01-01T23:59:59.000Z

246

Surface treated polypropylene (PP) fibres for reinforced concrete  

SciTech Connect (OSTI)

Surface treatments on a polypropylene (PP) fibre have contributed to the improvement of fibre/concrete adhesion in fibre-reinforced concrete. The treatments to the PP fibre were characterized by contact angle measurements, ATR-IR and XPS to analyse chemical alterations. The surface topography and fibre/concrete interaction were analysed by several microscopic techniques, namely optical petrographic, and scanning electron microscopy. Treatment modified the surface chemistry and topography of the fibre by introducing sodium moieties and created additional fibre surface roughness. Modifications in the fibre surface led to an increase in the adhesion properties between the treated fibres and concrete and an improvement in the mechanical properties of the fibre-reinforced concrete composite as compared to the concrete containing untreated PP fibres. Compatibility with the concrete and increased roughness and mineral surface was also improved by nucleated portlandite and ettringite mineral association anchored on the alkaline PP fibre surface, which is induced during treatment.

López-Buendía, Angel M., E-mail: buendia@uv.es [AIDICO Technological Institute of Construction, Benjamin Franklin 17, 46380 Paterna, Valencia (Spain); Romero-Sánchez, María Dolores [AIDICO Technological Institute of Construction, Marble Technical Unit, Camí de Castella 4, 03660 Novelda. Alicante (Spain)] [AIDICO Technological Institute of Construction, Marble Technical Unit, Camí de Castella 4, 03660 Novelda. Alicante (Spain); Climent, Verónica [Lafarge Cementos, Polígono Sepes, Isaac Newton s/n, 46500 Sagunto, Valencia (Spain)] [Lafarge Cementos, Polígono Sepes, Isaac Newton s/n, 46500 Sagunto, Valencia (Spain); Guillem, Celia [AIDICO Technological Institute of Construction, Marble Technical Unit, Camí de Castella 4, 03660 Novelda. Alicante (Spain)] [AIDICO Technological Institute of Construction, Marble Technical Unit, Camí de Castella 4, 03660 Novelda. Alicante (Spain)

2013-12-15T23:59:59.000Z

247

Recycling of PET bottles as fine aggregate in concrete  

SciTech Connect (OSTI)

An attempt to substitute in concrete the 5% by weight of fine aggregate (natural sand) with an equal weight of PET aggregates manufactured from the waste un-washed PET bottles (WPET), is presented. The WPET particles possessed a granulometry similar to that of the substituted sand. Specimens with different cement content and water/cement ratio were manufactured. Rheological characterization on fresh concrete and mechanical tests at the ages of 28 and 365 days were performed on the WPET/concretes as well as on reference concretes containing only natural fine aggregate in order to investigate the influence of the substitution of WPET to the fine aggregate in concrete. It was found that the WPET concretes display similar workability characteristics, compressive strength and splitting tensile strength slightly lower that the reference concrete and a moderately higher ductility.

Frigione, Mariaenrica, E-mail: mariaenrica.frigione@unisalento.i [Department of Engineering for Innovation, University of Salento, Via per Monteroni, 73100 Lecce (Italy)

2010-06-15T23:59:59.000Z

248

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

249

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

250

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

251

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

252

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

253

Wearability of Portland Cement Concrete Pavement Finishes  

E-Print Network [OSTI]

Major Subject: Civil Engineering NEARABILITY OF PORTLAND CENENT CONCRETE PAPFNENT FIVISNFS A Thesis by Nilliam Rem NcKeen Approved as to style and content by: (Chairman of Committ e) (Nember) August 1971 ABSTRACT Hearabil'tv of Portland Cement... portland cement, and an air entrainment admixture. Standard laboratory tests were performed on all aggregates to determine their properties. iv The test specimens were molded in a controlled environmental room and the anpropriate surface finish (burlap...

McKeen, William Rew

1971-01-01T23:59:59.000Z

254

Radionuclide Retention in Concrete Waste Forms  

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 waste form performance is affected by the full range of environmental conditions within the disposal facility; the process of waste form aging under conditions that are representative of processes occurring in response to changing environmental conditions within the disposal facility; the effect of waste form 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 waste forms come in contact with groundwater. The information presented in the report provides data that 1) quantify radionuclide retention within concrete waste form materials similar to those used to encapsulate waste in the Low-Level Waste Burial Grounds (LLBG); 2) measure the effect of concrete waste form properties likely to influence radionuclide migration; and 3) quantify the stability of uranium-bearing solid phases of limited solubility in concrete.

Mattigod, Shas V.; Bovaird, Chase C.; Wellman, Dawn M.; Wood, Marcus I.

2010-09-30T23:59:59.000Z

255

A study of the relationship of variety of cotton and plant population to harvesting by both roller and brush type strippers  

E-Print Network [OSTI]

SaRmLtt@d to t. hs '1~ ~1 of t ie Agricalt. oral srd Riie&snto@1 ~ of Texas M ~ f'zlf&lzent of ~ xeq~~ for the ~ of L~ 1)$2 A STUDY OF THE RELATIONSHIP OF VARIETY OF COTTON AND PLANT POPULATION TO HARVESTING BY BOTH ROLLER AND BRUSH 1YPE... . . . . . . . . . . , . . . 18 Semi-store resistant Vsrietiss . . . . . . . . . . . 18 OPen Boll Varieties . . . . . . . . . . , . . . . . . 1$ IV. Plan snd Prooednre Harvesting * Cleaning ~ ~ ~ ~ ~ ~ ~ 20 ~ ~ ~ ~ ~ ~ ~ ~ 21 Ginning e ~ ~ ~ ~ ~ ~ ~ ~ ~ l ~ 23 Crsding...

Rogers, Ernest Brasington, Jr

1952-01-01T23:59:59.000Z

256

Analytical and Experimental Assessment of Seismic Vulnerability of Beam-Column Joints without Transverse Reinforcement in Concrete Buildings  

E-Print Network [OSTI]

Deformations in Reinforced Concrete Beam–Column Joints?,P. , ?Update to ASCE/SEI 41 Concrete Provisions?, EarthquakeEffective Stiffness of Reinforced Concrete Columns?, Pacific

Hassan, Wael M.

2011-01-01T23:59:59.000Z

257

Coupled Damage and Plasticity Modelling in Transient Dynamic Analysis of Concrete  

E-Print Network [OSTI]

Coupled Damage and Plasticity Modelling in Transient Dynamic Analysis of Concrete F. Gatuingt Abstract In a concrete structure subjected to an explosion, for example a concrete slab, the material on the same concrete. Computations of split Hopkinson tests on confined concrete, a tensile test with scabbing

258

University of North Carolina at Charlotte Design and Construction Manual Section 2, Division 03 Concrete  

E-Print Network [OSTI]

. American Concrete Institute (ACI) B. American Society for Testing and Materials (ASTM) C. Portland Cement ­ Concrete SECTION 2 DIVISION 03 CONCRETE #12;University of North Carolina at Charlotte Design and Construction Manual Section 2, Division 03 ­ Concrete DIVISION 3 - CONCRETE Note: This is a guide for Designers

Xie,Jiang (Linda)

259

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

260

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.

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

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

262

The Cooling of Compact Stars  

E-Print Network [OSTI]

The cooling of a compact star depends very sensitively on the state of dense matter at supranuclear densities, which essentially controls the neutrino emission, as well as on the structure of the stellar outer layers which control the photon emission. Open issues concern the hyperon population, the presence of meson condensates, superfluidity and superconductivity, and the transition of confined hadronic matter to quark matter. This paper describes these issues and presents cooling calculations based on a broad collection of equations of state for neutron star matter and strange matter. These results are tested against the body of observed cooling data.

Dany Page; Ulrich Geppert; Fridolin Weber

2005-08-01T23:59:59.000Z

263

Dynamic Impact Analyses and Tests of Concrete Overpacks - 13638  

SciTech Connect (OSTI)

Concrete cask is an option for spent nuclear fuel interim storage which is prevailingly used in US. A concrete cask usually consists of metallic canister which confines the spent nuclear fuel and concrete overpack. When the overpack undergoes a severe missile impact which might be caused by a tornado or an aircraft crash, it should sustain acceptable level of structural integrity so that its radiation shielding capability and the retrievability of canister are maintained. Missile impact against a concrete overpack involves two damage modes, local damage and global damage. Local damage of concrete is usually evaluated by empirical formulas while the global damage is evaluated by finite element analysis. In many cases, those two damage modes are evaluated separately. In this research, a series of numerical simulations are performed using finite element analysis to evaluate the global damage of concrete overpack as well as its local damage under high speed missile impact. We consider two types of concrete overpack, one with steel in-cased concrete without reinforcement and the other with partially-confined reinforced concrete. The numerical simulation results are compared with test results and it is shown that appropriate modeling of material failure is crucial in this analysis and the results are highly dependent on the choice of failure parameters. (authors)

Lee, Sanghoon; Cho, Sang-Soon; Kim, Ki-Young; Jeon, Je-Eon; Seo, Ki-Seog [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)] [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

2013-07-01T23:59:59.000Z

264

An investigation of tendon sheathing filler migration into concrete  

SciTech Connect (OSTI)

During some of the inspections at nuclear power plants with prestressed concrete containments, it was observed that the containments has experienced leakage of the tendon sheathing filler (i.e., streaks). The objective of this activity was to provide an indication of the extent of tendon sheathing filler leakage into the concrete and its affects on concrete properties. Literature was reviewed and concrete core samples were obtained from the Trojan Nuclear Plant and tested. The literature primarily addressed effects of crude or lubricating oils that are known to cause concrete damage. However, these materials have significantly different characteristics relative to the materials used as tendon sheathing fillers. Examination and testing of the concrete cores indicated that the appearance of tendon sheathing filler on the concrete surface was due to leakage from the conduits and its subsequent migration through cracks that were present. Migration of the tendon sheathing filler was confined to the cracks and there was no perceptible movement into the concrete. Results of compressive strength testing indicated that the concrete quality was consistent in the containment and that the strength had increased over 40% in 25.4 years relative to the average compressive strength at 28-days age.

Naus, D.J.; Oland, C.B. [Oak Ridge National Lab., TN (United States)

1998-03-01T23:59:59.000Z

265

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...

266

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

267

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...

268

Optimization of Flexural capacity Of Reinforced fibrous concrete ...  

E-Print Network [OSTI]

Dec 22, 2005 ... Optimization of Flexural capacity Of Reinforced fibrous concrete Beams Using Genetic Algorithm. D Suji (suji_mohan2002 ***at*** yahoo.com)

D Suji

2005-12-22T23:59:59.000Z

269

On Concrete Universals: A Modern Treatment using Category Theory  

E-Print Network [OSTI]

Today it would be considered "bad Platonic metaphysics" to think that among all the concrete instances of a property there could be a universal instance so that all instances had the property by virtue of participating in that concrete universal. Yet there is a mathematical theory, category theory, dating from the mid-20th century that shows how to precisely model concrete universals within the "Platonic Heaven" of mathematics. This paper, written for the philosophical logician, develops this category-theoretic treatment of concrete universals along with a new concept to abstractly model the functions of a brain.

David Ellerman

2014-05-09T23:59:59.000Z

270

Optimization of Flexural capacity of Reinforced fibrous Concrete ...  

E-Print Network [OSTI]

Optimizing the flexural capacity of steel fiber reinforced concrete beams, with random ... standard test procedures to be adopted for testing and evaluation of the ...

step1

2005-05-24T23:59:59.000Z

271

Compact submanifolds supporting singular interactions  

SciTech Connect (OSTI)

A quantum particle moving under the influence of singular interactions on embedded surfaces furnish an interesting example from the spectral point of view. In these problems, the possible occurrence of a bound-state is perhaps the most important aspect. Such systems can be introduced as quadratic forms and generically they do not require renormalization. Yet an alternative path through the resolvent is also beneficial to study various properties. In the present work, we address these issues for compact surfaces embedded in a class of ambient manifolds. We discover that there is an exact bound state solution written in terms of the heat kernel of the ambient manifold for a range of coupling strengths. Moreover, we develop techniques to estimate bounds on the ground state energy when several surfaces, each of which admits a bound state solution, coexist. -- Highlights: •Schrödinger operator with singular interactions supported on compact submanifolds. •Exact bound-state solution in terms of the heat kernel of the ambient manifold. •Generalization of the variational approach to a collection of submanifolds. •Existence of a lower bound for a unique ground state energy.

Kaynak, Burak Tevfik, E-mail: burak.kaynak@boun.edu.tr; Teoman Turgut, O., E-mail: turgutte@boun.edu.tr

2013-12-15T23:59:59.000Z

272

Compacted carbon for electrochemical cells  

DOE Patents [OSTI]

This invention provides compacted carbon that is useful in the electrode of an alkali metal/carbon electrochemical cell of improved capacity selected from the group consisting of: (a) coke having the following properties: (1) an x-ray density of at least 2.00 grams per cubic centimeters, (2) a closed porosity of no greater than 5%, and (3) an open porosity of no greater than 47%; and (b) graphite having the following properties: (1) an x-ray density of at least 2.20 grams per cubic centimeters, (2) a closed porosity of no greater than 5%, and (3) an open porosity of no greater than 25%. This invention also relates to an electrode for an alkali metal/carbon electrochemical cell comprising compacted carbon as described above and a binder. This invention further provides an alkali metal/carbon electrochemical cell comprising: (a) an electrode as described above, (b) a non-aqueous electrolytic solution comprising an organic aprotic solvent and an electrolytically conductive salt and an alkali metal, and (c) a counter electrode. 10 figs.

Greinke, R.A.; Lewis, I.C.

1997-10-14T23:59:59.000Z

273

Hydrostatic compaction of Microtherm HT.  

SciTech Connect (OSTI)

Two samples of jacketed Microtherm{reg_sign}HT were hydrostatically pressurized to maximum pressures of 29,000 psi to evaluate both pressure-volume response and change in bulk modulus as a function of density. During testing, each of the two samples exhibited large irreversible compactive volumetric strains with only small increases in pressure; however at volumetric strains of approximately 50%, the Microtherm{reg_sign}HT stiffened noticeably at ever increasing rates. At the maximum pressure of 29,000 psi, the volumetric strains for both samples were approximately 70%. Bulk modulus, as determined from hydrostatic unload/reload loops, increased by more than two-orders of magnitude (from about 4500 psi to over 500,000 psi) from an initial material density of {approx}0.3 g/cc to a final density of {approx}1.1 g/cc. An empirical fit to the density vs. bulk modulus data is K = 492769{rho}{sup 4.6548}, where K is the bulk modulus in psi, and {rho} is the material density in g/cm{sup 3}. The porosity decreased from 88% to {approx}20% indicating that much higher pressures would be required to compact the material fully.

Broome, Scott Thomas; Bauer, Stephen J.

2010-09-01T23:59:59.000Z

274

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

275

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, Moshe (Haifa, IL); Gruen, Dieter M. (Downers Grove, IL); Mendelsohn, Marshall H. (Woodridge, IL); Sheft, Irving (Oak Park, IL)

1981-01-01T23:59:59.000Z

276

On compact generation of deformed schemes.  

E-Print Network [OSTI]

We obtain a theorem which allows to prove compact generation of derived categories of Grothendieck categories, based upon certain coverings by localizations. This theorem follows from an application of Rouquier's cocovering theorem in the triangulated context, and it implies Neeman's result on compact generation of quasi-compact separated schemes. We prove an application of our theorem to non-commutative deformations of such schemes, based upon a change from Koszul complexes to Chevalley-Eilenberg complexes.

Wendy Lowen; Michel Van den Bergh

277

Interstate Mining Compact Commission (multi-state)  

Broader source: Energy.gov [DOE]

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...

278

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.

279

Convolution type operators on locally compact groups  

E-Print Network [OSTI]

Shtein--~erg, Convolution Type Operators on Locally Compact Groups [in Russian],. Manuscript Deposited in the All-Union Institute of Scientific and Technical ...

280

Modeling and Simulation of Electromutagenic Processes for Multiscale Modification of Concrete Jinko Kanno1  

E-Print Network [OSTI]

Modeling and Simulation of Electromutagenic Processes for Multiscale Modification of Concrete Jinko Engineering Program, Louisiana Tech University ABSTRACT Concrete contains numerous pores that allow of concrete with solid materials or nanoparticles tends to improve the strength significantly. In this paper

Kanno,Jinko

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

Transportation Research Board AFN 10: Basic Research and Emerging Technologies in Concrete  

E-Print Network [OSTI]

Transportation Research Board AFN 10: Basic Research and Emerging Technologies in Concrete I will identify potential problems related to concrete materials, and develop research needs statement within STATEMENT AND BACKGROUND The chloride induced corrosion of steel reinforcement embedded in concrete

282

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

E-Print Network [OSTI]

0 to 100% slag, Cement and Concrete Research, 40 (2010) 971-ray microscopy, Cement and Concrete Research, 35 (2005) 351-ray microscopy, Cement and Concrete Research, 28 (1998) 411-

Moon, Juhyuk

2013-01-01T23:59:59.000Z

283

CONCRETE STRUCTURE DESIGN USING MIXED-INTEGER NONLINEAR PROGRAMMING WITH COMPLEMENTARITY  

E-Print Network [OSTI]

CONCRETE STRUCTURE DESIGN USING MIXED-INTEGER NONLINEAR PROGRAMMING WITH COMPLEMENTARITY programming (MINLP) formulation to achieve mini- mum-cost designs for reinforced concrete (RC) structures for concrete, steel reinforcing bars, and formwork according to typical contractor methods. Restrictions

284

A TIME-DEPENDENT METHOD FOR CHARACTERIZING THE DIFFUSION OF RADON-222 IN CONCRETE  

E-Print Network [OSTI]

Coefficient of Radon in Concrete", Health Phys. 30, 263. Didiffusion of radon through concrete. The source loop exposesa 2.5-cm sample taken from a different type of concrete.

Zapalac, Geordie H.

2013-01-01T23:59:59.000Z

285

Development of load and resistance factor design for FRP strengthening of reinforced concrete structures  

E-Print Network [OSTI]

Design for FRP Strengthening of Reinforced Concrete. In 7 thFRP) Reinforcement for Concrete Structure; Shield, C.K. ,G.C. Fatigue Performance of Concrete Beams Strengthened with

Atadero, Rebecca Anne

2006-01-01T23:59:59.000Z

286

Instantaneous In-Situ Determination of Water-Cement Ratio of Fresh Concrete  

E-Print Network [OSTI]

method for cement content determination of fresh concrete.Cement and Concrete Research, 1980. 10(1): p. 23-34. Hime,the cement content of plastic concrete. ASTM Bulletin, 1955.

Mancio, Mauricio; Moore, Jeffrey R.; Brooks, Zenzile; Monteiro, Paulo J. M.; Glaser, Steve D.

2010-01-01T23:59:59.000Z

287

Sensitivity Analysis of 2002 Design Guide Distress Prediction Models for Jointed Plain Concrete Pavement  

E-Print Network [OSTI]

for Jointed Plain Concrete Pavement Venkata Kannekanti andfeatures, portland cement concrete (PCC) strength, andj o i n t e d p l a i n concrete pavement (JPCP) module o f

Kannekanti, Venkata N.; Harvey, John T

2007-01-01T23:59:59.000Z

288

Experimental and Analytical Studies on Old Reinforced Concrete Buildings with Seismically Vulnerable Beam-Column Joints  

E-Print Network [OSTI]

concrete thickness of the beam cross- sections were measured after testingconducted at the testing day. Table B.3 Concrete cylindertesting (d) EW beam (c) NS beam Figure V.52 Failure of SP4 after removing concrete

PARK, SANGJOON

2010-01-01T23:59:59.000Z

289

Analytical and experimental study of seismic performance of reinforced concrete frames infilled with masonry walls  

E-Print Network [OSTI]

of concrete and implications for choice of testingTable Testing of Gravity Load Designed Reinforced ConcreteConcrete Institute ASCE American Society of Civil Engineers ASTM American Society for Testing

Stavridis, Andreas

2009-01-01T23:59:59.000Z

290

Analytical Modeling of Cyclic Shear - Flexure Interaction in Reinforced Concrete Structural Walls  

E-Print Network [OSTI]

Strength of Concrete at the Day of Testing (Tran,Strength of Concrete at the Day of Testing (Tran, 2012) No.concrete compressive strengths at the time of testing ranged

Kolozvari, Kristijan

2013-01-01T23:59:59.000Z

291

Seismic Performance of Reinforced Concrete Bridges Allowed to Uplift During Multi-Directional Excitation  

E-Print Network [OSTI]

were cast for testing concrete compressive strength at 7strength of column concrete on testing day was about 4.7Concrete Cylinders.. 39   Table 3.4: Testing

Espinoza, Andres Oscar

2011-01-01T23:59:59.000Z

292

Construction and Preliminary HVS Tests of Pre-Cast Concrete Pavement Slabs  

E-Print Network [OSTI]

Cast Concrete Pavement Slabs with HVS Testing. ” TechnicalCast Concrete Pavement Slabs with HVS Testing Signatures: E.subgrade. FWD testing on the centers of the concrete slabs

Kohler, Erwin R.; du Plessis, Louw; Theyse, Hechter

2008-01-01T23:59:59.000Z

293

Compact Solid State Cooling Systems: Compact MEMS Electrocaloric Module  

SciTech Connect (OSTI)

BEETIT Project: UCLA is developing a novel solid-state cooling technology to translate a recent scientific discovery of the so-called giant electrocaloric effect into commercially viable compact cooling systems. Traditional air conditioners use noisy, vapor compression systems that include a polluting liquid refrigerant to circulate within the air conditioner, absorb heat, and pump the heat out into the environment. Electrocaloric materials achieve the same result by heating up when placed within an electric field and cooling down when removed—effectively pumping heat out from a cooler to warmer environment. This electrocaloric-based solid state cooling system is quiet and does not use liquid refrigerants. The innovation includes developing nano-structured materials and reliable interfaces for heat exchange. With these innovations and advances in micro/nano-scale manufacturing technologies pioneered by semiconductor companies, UCLA is aiming to extend the performance/reliability of the cooling module.

None

2010-10-01T23:59:59.000Z

294

Earth pressures on reinforced concrete box culverts  

E-Print Network [OSTI]

. 28 day Compressive Strength in psi 3000 4150 Max. Water/Cement Ratio in gallons/sack Slump Range in inches 7. 0 3-4 5. 4 - 5. 7 3. 5 - 5. 5 Note: 1 yd = 0. 765 m , 1 psi = 6. 89 kpa, 1 in. = 2. 54 cm. , 3 3 1 sack of cement = 94 lb, 1 lb...-structure interface. It also provides the highest degree of 6000 5000 '"4000 ~ 3000 C. I2000 0 0 7 14 21 28 35 Time (days) FIG. 3 - Measured Concrete Compressive Strength (1 psi 6. 89 kpa) 42 PLAN 14 ~ ~ 11 15 ~ ~ 12 & 16 + ~ 13 ~ 8 ~ 9 ~ 10 5 ~ 3...

Brown, Dale Evan

1986-01-01T23:59:59.000Z

295

Microscale investigation of the corrosion performances of low-carbon and stainless steels in highly alkaline concretes  

E-Print Network [OSTI]

can diffuse through the porous concrete and react with thein concrete, oxygen diffuses through the porous hydrated

Itty, Pierre-Adrien

2012-01-01T23:59:59.000Z

296

Numerical analysis of masonry-infilled reinforced concrete frames subjected to seismic loads and experimental evaluation of retrofit techniques  

E-Print Network [OSTI]

infill Load ratio age at testing Concrete frame Infill paneltesting of masonry infilled reinforced concrete frame,” ASCE

Koutromanos, Ioannis

2011-01-01T23:59:59.000Z

297

Construction and Preliminary HVS Tests of Pre-Cast Concrete Pavement Slabs  

E-Print Network [OSTI]

22 Figure 22. FWD data collection points on the concreteelastic moduli for the concrete, the cemented base, and the30 Figure 29. Backcalculated stiffness of concrete

Kohler, Erwin R.; du Plessis, Louw; Theyse, Hechter

2008-01-01T23:59:59.000Z

298

aggregates by relationship to concrete: Topics by E-print Network  

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

Concrete under Reversed Cyclic Loading by Jun Wei Behaviour and Analysis of Steel Fibre-Reinforced Concrete Subjected to Reversed Cyclic Loading Jun Wei Luo for developing...

299

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...

300

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...

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

E-Print Network 3.0 - aged concrete structures Sample Search...  

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

risk of premature corrosion deterioration in concrete structures exposed to aggressive salt- laden... is slightly lower at early ages than those of control concretes but exceeds...

302

Interlingual Encounter in Pierre Garnier and Niikuni Seiichi’s French-Japanese Concrete Poetry  

E-Print Network [OSTI]

P. (1968d). Spatialisme et poésie concrète [Spatialismand concrete poetry]. Paris: Gallimard. Garnier, P. (Gomringer, E. (1968). Concrete poetry (I. M. Sinor & M. E.

Wong, Elaine S.

2015-01-01T23:59:59.000Z

303

Energy Efficiency Improvement and Cost Saving Oportunities for the Concrete Industry  

E-Print Network [OSTI]

Testing and Materials (ASTM) C94. Standard Specification for Ready Mixed Concrete.Concrete. West Conshohocken, Pennsylvania. American Society for Testing

Kermeli, Katerina

2013-01-01T23:59:59.000Z

304

E-Print Network 3.0 - antiwashout underwater concrete Sample...  

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

Page 1. Report No. Summary: . Recipient's Catalog No. 4. Title and Subtitle Prediction Model for Concrete Behavior--Final Report 5. Report... for Concrete Behavior. The main...

305

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

306

THERMAL CONDUCTIVITY OF HEMP CONCRETES: VARIATION WITH FORMULATION, DENSITY AND  

E-Print Network [OSTI]

envelope and on the performance of systems. This behaviour is related to hygric and thermal propertiesTHERMAL CONDUCTIVITY OF HEMP CONCRETES: VARIATION WITH FORMULATION, DENSITY AND WATER CONTENT of formulation, density and water content on the thermal conductivity of hemp concretes. The investigations

307

ARE DEICING SALTS NECESSARY TO PROMOTE SCALING IN CONCRETE?  

E-Print Network [OSTI]

. Keywords: Concrete, cryosuction, durability, frost, poromechanics, porous media, thermo- dynamics, spallingARE DEICING SALTS NECESSARY TO PROMOTE SCALING IN CONCRETE? A. Fabbri1,2 , O. Coussy1 , T. Fen of the different phases that form the porous material. It eventually predicts that a less perme- able sample

Paris-Sud XI, Université de

308

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

309

Electropositive bivalent metallic ion unsaturated polyester complexed polymer concrete  

DOE Patents [OSTI]

Quick setting polymer concrete compositions are described which are mixtures of unsaturated polyesters and crosslinking monomers together with appropriate initiators and promoters in association with aggregate which may be wet and a source of bivalent metallic ions which will set to polymer concrete with excellent structural properties.

Sugama, T.; Kukacka, L.E.; Horn, W.H.

1983-05-13T23:59:59.000Z

310

Electropositive bivalent metallic ion unsaturated polyester complexed polymer concrete  

DOE Patents [OSTI]

Quick setting polymer concrete compositions with excellent structural properties are disclosed; these polymer concrete compositions are mixtures of unsaturated polyesters and crosslinking monomers together with appropriate initiators and promoters in association with aggregate, which may be wet, and with a source of bivalent metallic ions.

Sugama, Toshifumi (Mastic Beach, NY); Kukacka, Lawrence E. (Port Jefferson, NY); Horn, William H. (Brookhaven, NY)

1985-01-01T23:59:59.000Z

311

Electropositive bivalent metallic ion unsaturated polyester complexed polymer concrete  

DOE Patents [OSTI]

Quick setting polymer concrete compositions which are mixtures of unsaturated polyesters and crosslinking monomers together with appropriate initiators and promoters in association with aggregate which may be wet and a source of bivalent metallic ions which will set to polymer concrete with excellent structural properties.

Sugama, T.; Kukacka, L.E.; Horn, W.H.

1981-11-04T23:59:59.000Z

312

Method for incorporating radioactive phosphoric acid solutions in concrete  

DOE Patents [OSTI]

A method for incorporating radioactive phosphoric acid solutions in concrete is described wherein the phosphoric acid is reacted with Ca(OH).sub.2 to form a precipitate of hydroxyapatite and the hydroxyapatite is mixed with portland cement to form concrete.

Wolf, Gary A [Kennewick, WA; Smith, Jeffrey W [Lancaster, OH; Ihle, Nathan C [Walla Walla, WA

1984-01-01T23:59:59.000Z

313

NIST Special Publication 1173 Virtual Cement and Concrete  

E-Print Network [OSTI]

#12;NIST Special Publication 1173 Virtual Cement and Concrete Testing Laboratory Version 9.5 User;Virtual Cement and Concrete Testing Laboratory Version 9.5 User Guide Jeffrey W. Bullard1 Materials-8615 This document serves as the user's guide for the Virtual Cement and Con- crete Testing Laboratory (VCCTL

314

Hybrid FRP/Concrete Structural Members and Sami Rizkalla  

E-Print Network [OSTI]

with differentfiber orientations partially and/or totallyfilled with concrete. Hollow FRP and steel tubes were testedHybrid FRP/Concrete Structural Members Amir Fam1 and Sami Rizkalla 2 Department of Civil, highway overhead sign structures and bridges. The experimental program included testing to failure tubes

315

Method for incorporating radioactive phosphoric acid solutions in concrete  

DOE Patents [OSTI]

A method for incorporating radioactive phosphoric acid solutions in concrete is described wherein the phosphoric acid is reacted with Ca(OH)/sub 2/ to form a precipitate of hydroxyapatite and the hydroxyapatite is mixed with Portland cement to form concrete.

Wolf, G.A.; Smith, J.W.; Ihle, N.C.

1982-07-08T23:59:59.000Z

316

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

317

Testing and evaluation of electrokinetic decontamination of concrete  

SciTech Connect (OSTI)

The goals and objectives of the technical task plan (TTP) are to (1) describe the nature and extent of concrete contamination within the Department of Energy (DOE) complex and emerging and commercial technologies applicable to these problems; (2) to match technologies to the concrete problems and recommend up to four demonstrations; (3) to initiate recommended demonstrations; and (4) to continue investigation and evaluation of the application of electrokinetic decontamination processes to concrete. This document presents findings of experimental and theoretical studies of the electrokinetic decontamination (EK) process and their implications for field demonstrations. This effort is an extension of the work performed under TTP 142005, ``Electroosmotic Concrete Decontamination. The goals of this task were to determine the applicability of EK for treating contaminated concrete and, if warranted, to evaluate EK as a potential technology for demonstration. 62 refs.

DePaoli, D.W.; Harris, M.T.; Ally, M.R. [Oak Ridge National Lab., TN (United States). Chemical Technology Div.] [and others

1996-10-01T23:59:59.000Z

318

SLAM: a sodium-limestone concrete ablation model  

SciTech Connect (OSTI)

SLAM is a three-region model, containing a pool (sodium and reaction debris) region, a dry (boundary layer and dehydrated concrete) region, and a wet (hydrated concrete) region. The model includes a solution to the mass, momentum, and energy equations in each region. A chemical kinetics model is included to provide heat sources due to chemical reactions between the sodium and the concrete. Both isolated model as well as integrated whole code evaluations have been made with good results. The chemical kinetics and water migration models were evaluated separately, with good results. Several small and large-scale sodium limestone concrete experiments were simulated with reasonable agreement between SLAM and the experimental results. The SLAM code was applied to investigate the effects of mixing, pool temperature, pool depth and fluidization. All these phenomena were found to be of significance in the predicted response of the sodium concrete interaction. Pool fluidization is predicted to be the most important variable in large scale interactions.

Suo-Anttila, A.J.

1983-12-01T23:59:59.000Z

319

Compacted Soil Liner Interface Strength Importance  

E-Print Network [OSTI]

Case Study Compacted Soil Liner Interface Strength Importance Timothy D. Stark, F.ASCE1 ; Hangseok interface is not the geomembrane (GM)/compacted low-permeability soil liner (LPSL) but a soil­soil interface placing the cover soil from bottom to top. DOI: 10.1061/(ASCE)GT.1943-5606 .0000556. © 2012 American

320

Non-compact versions of Edwards' Theorem  

E-Print Network [OSTI]

Edwards' Theorem establishes duality between a convex cone in the space of continuous functions on a compact space and the set of representing or Jensen measures for this cone. In this paper we prove non-compact versions of this theorem.

Gogus, Nihat G; Poletsky, Evgeny A

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.


321

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

322

Review of Concrete Biodeterioration in Relation to Buried Nuclear Waste  

SciTech Connect (OSTI)

Long-term storage of low level radioactive material in below ground concrete disposal units (DUs) (Saltstone Disposal Facility) is a means of depositing wastes generated from nuclear operations of the U.S. Department of Energy. Based on the currently modeled degradation mechanisms, possible microbial induced effects on the structural integrity of buried low level wastes must be addressed. Previous international efforts related to microbial impacts on concrete structures that house low level radioactive waste showed that microbial activity can play a significant role in the process of concrete degradation and ultimately structural deterioration. This literature review examines the recent research in this field and is focused on specific parameters that are applicable to modeling and prediction of the fate of concrete vaults housing stored wastes and the wastes themselves. Rates of concrete biodegradation vary with the environmental conditions, illustrating a need to understand the bioavailability of key compounds involved in microbial activity. Specific parameters require pH and osmotic pressure to be within a certain range to allow for microbial growth as well as the availability and abundance of energy sources like components involved in sulfur, iron and nitrogen oxidation. Carbon flow and availability are also factors to consider in predicting concrete biodegradation. The results of this review suggest that microbial activity in Saltstone, (grouted low level radioactive waste) is unlikely due to very high pH and osmotic pressure. Biodegradation of the concrete vaults housing the radioactive waste however, is a possibility. The rate and degree of concrete biodegradation is dependent on numerous physical, chemical and biological parameters. Results from this review point to parameters to focus on for modeling activities and also, possible options for mitigation that would minimize concrete biodegradation. In addition, key chemical components that drive microbial activity on concrete surfaces are discussed.

Turick, C; Berry, C.

2012-10-15T23:59:59.000Z

323

National Compact Stellarator Experiment Project Closeout Report PROJECT CLOSEOUT REPORT  

E-Print Network [OSTI]

National Compact Stellarator Experiment Project Closeout Report i PROJECT CLOSEOUT REPORT NATIONAL of Science Princeton Plasma Physics Laboratory Oak Ridge National Laboratory #12;National Compact Stellarator Experiment Project Closeout Report PROJECT CLOSEOUT REPORT NATIONAL COMPACT STELLARATOR EXPERIMENT (NCSX

Princeton Plasma Physics Laboratory

324

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

325

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

326

A compact tritium AMS system  

SciTech Connect (OSTI)

Tritium ({sup 3}H) is a radioisotope that is extensively utilized in biological and environmental research. For biological research, {sup 3}H is generally quantified by liquid scintillation counting requiring gram-sized samples and counting times of several hours. For environmental research, {sup 3}H is usually quantified by {sup 3}He in-growth which requires gram-sized samples and in-growth times of several months. In contrast, provisional studies at LLNL's Center for Accelerator Mass Spectrometry have demonstrated that Accelerator Mass Spectrometry (AMS) can be used to quantify {sup 3}H in milligram-sized biological samples with a 100 to 1000-fold improvement in detection limits when compared to scintillation counting. This increased sensitivity is expected to have great impact in the biological and environmental research community. However in order to make the {sup 3}H AMS technique more broadly accessible, smaller, simpler, and less expensive AMS instrumentation must be developed. To meet this need, a compact, relatively low cost prototype {sup 3}H AMS system has been designed and built based on a LLNL ion source/sample changer and an AccSys Technology, Inc. Radio Frequency Quadrupole (RFQ) linac. With the prototype system, {sup 3}/{sup 1}H ratios ranging from 1 x 10{sup -10} to 1 x 10{sup -13} have to be measured from milligram sized samples. With improvements in system operation and sample preparation methodology, the sensitivity limit of the system is expected to increase to approximately 1 x 10{sup -15}.

Chiarappa, M L; Dingley, K H; Hamm, R W; Love, A H; Roberts, M L

1999-09-23T23:59:59.000Z

327

Compact, electro-hydraulic, variable valve actuation system providing...  

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

Compact, electro-hydraulic, variable valve actuation system providing variable lift, timing and duration to enable high efficiency engine combustion control Compact,...

328

Development of Compact Gaseous Sensors with Internal Reference...  

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

Compact Gaseous Sensors with Internal Reference for Monitoring O2 and NOx in Combustion Environments Development of Compact Gaseous Sensors with Internal Reference for Monitoring...

329

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...

330

Application of linear programming methods to determine the best location of concrete dispatch plants  

E-Print Network [OSTI]

Application of linear programming methods to determine the best location of concrete dispatch cement and concrete industry; "anybody can make concrete..... you just need cement, stone, sand, water the labor cost is so low, that for construction companies is cheaper to "handmade" their own concrete

Yong, Alexander

331

Predicting the Permeability of Pervious Concretes from Planar Images M.S. Sumanasooriya1  

E-Print Network [OSTI]

-dimensional material structures. Introduction Pervious concrete (also called Enhanced Porosity Concrete, or porous1 Predicting the Permeability of Pervious Concretes from Planar Images M.S. Sumanasooriya1 , D-dimensional material structures of pervious concretes using two-dimensional digital images obtained from actual

Bentz, Dale P.

332

4 CONCRETE REPAIR BULLETIN MAY/JUNE2001 Laser Profilometry for  

E-Print Network [OSTI]

4 CONCRETE REPAIR BULLETIN MAY/JUNE2001 Laser Profilometry for Concrete Substrate Characterization and resins are non- corrosive, they are ideally suited for the repair and retrofitting of concrete bridges highly upon the quality of the bond between the concrete and the laminate. Experience has shown that when

Maerz, Norbert H.

333

DESIGN GUIDELINES FOR CONCRETE BEAMS REINFORCED WITH MMFX MICROCOMPOSITE REINFORCING BARS  

E-Print Network [OSTI]

DESIGN GUIDELINES FOR CONCRETE BEAMS REINFORCED WITH MMFX MICROCOMPOSITE REINFORCING BARS M. Dawood: Corrosion of steel reinforcement in concrete structures and bridges is a major problem facing for concrete beams and slabs. The behavior of concrete beams reinforced with MMFX reinforcing bars is evaluated

334

Properties of concrete paving blocks made with waste marble Osman Gencela,f,*, Cengiz Ozelb  

E-Print Network [OSTI]

Properties of concrete paving blocks made with waste marble Osman Gencela,f,*, Cengiz Ozelb , Fuat: Concrete paving blocks Recycled aggregate Marble waste Concrete wear a b s t r a c t Marble industry. Waste marble is well usable instead of the usual aggregate in the concrete paving block production. Ã?

North Texas, University of

335

Analytical and numerical methods for processing Hopkinson Bar Loaded Bending test on concrete: a comparative study  

E-Print Network [OSTI]

Analytical and numerical methods for processing Hopkinson Bar Loaded Bending test on concrete on dynamic characteristics of concrete. Various techniques have been used to test concretes at high strain for concrete structures subjected to dynamic loading such as explosions or im- pacts require information

Boyer, Edmond

336

Effect of Fiber Orientation and Ply Mix on Fiber Reinforced Polymer-Confined Concrete  

E-Print Network [OSTI]

concrete by testing under uniaxial compression a designed array of plain concrete cylinders wrappedEffect of Fiber Orientation and Ply Mix on Fiber Reinforced Polymer-Confined Concrete Ching Au, A concrete lateral strain while the kink stress was found to upshift with increasing jacket stiffness

Entekhabi, Dara

337

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

338

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

339

Belle Fourche River Compact (South Dakota)  

Broader source: Energy.gov [DOE]

The Belle Fourche River Compact, agreed to by South Dakota and Wyoming, seeks to provide for the most efficient use of the waters of the Belle Fourche River Basin for multiple purposes, and to...

340

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

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

Gravitational waves from merging compact binaries  

E-Print Network [OSTI]

Largely motivated by the development of highly sensitive gravitational-wave detectors, our understanding of merging compact binaries and the gravitational waves they generate has improved dramatically in recent years. ...

Hughes, Scott A.

342

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

343

Stuck-at-fault test set compaction  

E-Print Network [OSTI]

. Test set size under pattern score based dynamic compaction . . . 13 . . . 17 Figure 7. Pattern Score distribution v:ith pattern metric dynamic compaction. . . . . . . . . . . . . . I g LIST OF TABLES Page Table l. l. nuit Target Sclcction Methods.... Fault Target Selection Methods Random Minimum Detection Count Circuit Name c432 c499 c880 c1355 c1908 G2670 Excitation Balance 0. 136296 0. 191652 0. 170293 0. 173310 0. 187486 0. 190484 Pattern Count 1152 873 2693 1394 1708 5148...

Vanfickell, Jason Michael

2013-02-22T23:59:59.000Z

344

Seismic rehabilitation of a reinforced concrete flat-slab structure  

E-Print Network [OSTI]

The effectiveness of seismic rehabilitation techniques used to eliminate punching shear failures was assessed for flat-slab structural systems. This type of retrofit was evaluated for a four-story reinforced concrete (RC) frame office building...

Jimenez, Laila Margarita

1999-01-01T23:59:59.000Z

345

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

346

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

347

Roman Seawater Concrete Holds the Secret to Cutting Carbon Emissions  

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

of Roman concrete from harbor installations that have survived 2,000 years of chemical attack and wave action, "one of the most durable construction materials on the planet," says...

348

Life cycle assessment of concrete pavements : impacts and opportunities  

E-Print Network [OSTI]

The concrete pavement network in the United States plays a crucial role in the economy by enabling the transport of people and goods, but it also leads to resource consumption and environmental impacts. This thesis is ...

Loijos, Alex (Alexander Nikos)

2011-01-01T23:59:59.000Z

349

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

350

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...

351

Compressive strength of concrete and mortar containing fly ash  

DOE Patents [OSTI]

The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention includes a method for predicting the compressive strength of such a hardenable mixture, which is very important for planning a project. The invention also relates to hardenable mixtures comprising cement and fly ash which can achieve greater compressive strength than hardenable mixtures containing only concrete over the time period relevant for construction. In a specific embodiment, a formula is provided that accurately predicts compressive strength of concrete containing fly ash out to 180 days. In other specific examples, concrete and mortar containing about 15% to 25% fly ash as a replacement for cement, which are capable of meeting design specifications required for building and highway construction, are provided. Such materials can thus significantly reduce construction costs.

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

1997-01-01T23:59:59.000Z

352

Compressive strength of concrete and mortar containing fly ash  

DOE Patents [OSTI]

The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention includes a method for predicting the compressive strength of such a hardenable mixture, which is very important for planning a project. The invention also relates to hardenable mixtures comprising cement and fly ash which can achieve greater compressive strength than hardenable mixtures containing only concrete over the time period relevant for construction. In a specific embodiment, a formula is provided that accurately predicts compressive strength of concrete containing fly ash out to 180 days. In other specific examples, concrete and mortar containing about 15% to 25% fly ash as a replacement for cement, which are capable of meeting design specifications required for building and highway construction, are provided. Such materials can thus significantly reduce construction costs. 33 figs.

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

1997-04-29T23:59:59.000Z

353

Compressive strength of concrete and mortar containing fly ash  

DOE Patents [OSTI]

The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention includes a method for predicting the compressive strength of such a hardenable mixture, which is very important for planning a project. The invention also relates to hardenable mixtures comprising cement and fly ash which can achieve greater compressive strength than hardenable mixtures containing only concrete over the time period relevant for construction. In a specific embodiment, a formula is provided that accurately predicts compressive strength of concrete containing fly ash out to 180 days. In other specific examples, concrete and mortar containing about 15% to 25% fly ash as a replacement for cement, which are capable of meeting design specification required for building and highway construction, are provided. Such materials can thus significantly reduce construction costs.

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

354

Compressive strength of concrete and mortar containing fly ash  

DOE Patents [OSTI]

The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention includes a method for predicting the compressive strength of such a hardenable mixture, which is very important for planning a project. The invention also relates to hardenable mixtures comprising cement and fly ash which can achieve greater compressive strength than hardenable mixtures containing only concrete over the time period relevant for construction. In a specific embodiment, a formula is provided that accurately predicts compressive strength of concrete containing fly ash out to 180 days. In other specific examples, concrete and mortar containing about 15% to 25% fly ash as a replacement for cement, which are capable of meeting design specification required for building and highway construction, are provided. Such materials can thus significantly reduce construction costs. 33 figs.

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

1998-12-29T23:59:59.000Z

355

The Influence of Travelling Fires on a Concrete Frame   

E-Print Network [OSTI]

. Current structural fire design methods do not account for these types of fires. This paper applies a novel methodology for defining a family of possible heating regimes to a framed concrete structure using the concept of travelling fires. A finite...

Law, Angus; Stern-Gottfried, Jamie; Gillie, Martin; Rein, Guillermo

2011-01-01T23:59:59.000Z

356

Concrete Industry Benefits from Ancient Romans and the ALS  

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

saw for the first time how an extraordinarily stable compound called calcium-aluminum-silicate-hydrate (C-A-S-H) plays an integral role in the structure of Roman seawater concrete,...

357

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

358

Water permeability and microstructure of three old concretes  

SciTech Connect (OSTI)

Measurement of the permeability of concrete to water is complicated by the self-sealing phenomenon, the progressive reduction of flow during the test. Many researchers have attributed self sealing to the hydration of previously unreacted cement on exposure to water. This paper describes permeability tests on concretes continuously hydrated for 26 years. Backscattered electron images show that virtually no unhydrated cement remains in these specimens, yet they exhibit self-sealing behavior.

Hearn, N.; Detwiler, R.J.; Sframeli, C. (Univ. of Toronto, Ontario (Canada). Dept. of Civil Engineering)

1994-01-01T23:59:59.000Z

359

Systems building of short span precast concrete bridges  

E-Print Network [OSTI]

SYSTEMS BUILDING OF SHORT SPAN PRECAST CONCRETE BRIDGES A Thesis by MARVIN STEELE Submitted to the Graduate College of Texas AIIM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE May 1975 Major... Subject: Civil Engineering SYSTEMS BUILDING OF SHORT SPAN PRECAST CONCRETE BRIDGES A Thesis by MARVIN STEELE Aoproved as to style and content by: (Chairman of Committee) (Head of Department ( mber) fi (Member) May 1975 ABSTRACT Systems Building...

Steele, Marvin

1975-01-01T23:59:59.000Z

360

Predicting the fatigue life of asphalt concrete overlay systems  

E-Print Network [OSTI]

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... 1979 Major Subject: Civil Engineering PREDICTING THE FATIGUE LIFE OF ASPHALT CONCRETE OVERLAY SYSTEMS A Thesis by FREDERICK PHILIP GERMANN Approved as to style and content by: (Chair n of Commit e) (Head of Department) (Member) (Member) May...

Germann, Frederick P

1979-01-01T23:59:59.000Z

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.


361

Study on concrete cask storage of spent fuel in Japan  

SciTech Connect (OSTI)

The present report describes the status of the first year`s work of a five-year-long study on concrete cask storage of spent fuel in Japan. Firstly, the proposed study program is elaborated to clarify the position of the present work. Then, the results of the study which have been obtained so far are described and the technical issues are addressed to make the concrete cask storage viable in Japan.

Itoh, C. [Central Research Inst. of Electric Power Industry, Abiko, Chiba (Japan). Nuclear Fuel Cycle Dept.; Onodera, A.; Yamada, N. [Hitachi Zosen Corp., Tokyo (Japan). Nuclear Div.

1993-12-31T23:59:59.000Z

362

Laboratory-scale sodium-carbonate aggregate concrete interactions. [LMFBR  

SciTech Connect (OSTI)

A series of laboratory-scale experiments was made at 600/sup 0/C to identify the important heat-producing chemical reactions between sodium and carbonate aggregate concretes. Reactions between sodium and carbonate aggregate were found to be responsible for the bulk of heat production in sodium-concrete tests. Exothermic reactions were initiated at 580+-30/sup 0/C for limestone and dolostone aggregates as well as for hydrated limestone concrete, and at 540+-10/sup 0/C for dehydrated limestone concrete, but were ill-defined for dolostone concrete. Major reaction products included CaO, MgO, Na/sub 2/CO/sub 3/, Na/sub 2/O, NaOH, and elemental carbon. Sodium hydroxide, which forms when water is released from cement phases, causes slow erosion of the concrete with little heat production. The time-temperature profiles of these experiments have been modeled with a simplified version of the SLAM computer code, which has allowed derivation of chemical reaction rate coefficients.

Westrich, H.R.; Stockman, H.W.; Suo-Anttila, A.

1983-09-01T23:59:59.000Z

363

Effect of Concrete Waste Form Properties on Radionuclide Migration  

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 waste form performance is affected by the full range of environmental conditions within the disposal facility, the process of waste form aging under conditions that are representative of processes occurring in response to changing environmental conditions within the disposal facility, the effect of waste form 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 waste forms come in contact with groundwater. Numerous sets of tests were initiated in fiscal years (FY) 2006-2009 to evaluate (1) diffusion of iodine (I) and technetium (Tc) from concrete into uncontaminated soil after 1 and 2 years, (2) I and rhenium (Re) diffusion from contaminated soil into fractured concrete, (3) I and Re (set 1) and Tc (set 2) diffusion from fractured concrete into uncontaminated soil, (4) evaluate the moisture distribution profile within the sediment half-cell, (5) the reactivity and speciation of uranium (VI) (U(VI)) compounds in concrete porewaters, (6) the rate of dissolution of concrete monoliths, and (7) the diffusion of simulated tank waste into concrete.

Mattigod, Shas V.; Bovaird, Chase C.; Wellman, Dawn M.; Skinner, De'Chauna J.; Cordova, Elsa A.; Wood, Marcus I.

2009-09-30T23:59:59.000Z

364

Soil Quality Information Sheet Rangeland Soil Quality--Compaction  

E-Print Network [OSTI]

Soil Quality Information Sheet Rangeland Soil Quality--Compaction USDA, Natural Resources Conservation Service May 2001 Rangeland Sheet 4 What is compaction? Soil compaction occurs when moist or wet soil aggregates are pressed together and the pore space between them is reduced. Compaction changes

365

Compact Proof Certificates For Linear Logic Kaustuv Chaudhuri  

E-Print Network [OSTI]

Compact Proof Certificates For Linear Logic Kaustuv Chaudhuri INRIA, France http://kaustuv.chaudhuri

Chaudhuri, Kaustuv

366

VIII International Conference on Fracture Mechanics of Concrete and Concrete Structures C. Boulay, S. Staquet, M. Azenha, A. Deraemaeker, M. Crespini, J. Carette, J. Granja, B. Delsaute, C. Dumoulin, G. Karaiskos  

E-Print Network [OSTI]

of concrete, Young's modulus, round robin test, dynamic testing, ultrasonic measurements Abstract: Early age static tests at the time of the concrete setting. This difference decreases as the concrete hardens. 1VIII International Conference on Fracture Mechanics of Concrete and Concrete Structures FraMCoS-8 C

Paris-Sud XI, Université de

367

Assessment of FRP composite strengthened reinforced concrete bridge structures at the component and systems level through progressive damage and Non-Destructive Evaluation (NDE)  

E-Print Network [OSTI]

as obtained from testing of the concrete used in the testTesting Techniques for FRP Rehabilitated Concrete: I – ATesting Techniques for FRP Rehabilitated Concrete: II –

Ghosh, Kumar Kanti

2006-01-01T23:59:59.000Z

368

Achieving "Green" Concrete Through The Use Of High Performance FiberThe Use Of High Performance Fiber  

E-Print Network [OSTI]

Achieving "Green" Concrete Through The Use Of High Performance FiberThe Use Of High Performance Fiber Reinforced Concrete ShihShih--Ho Chao,Ho Chao, Ph.DPh.D Assistant Professor, Department of Civil, 2008 #12;What is D rable Concrete?What is D rable Concrete?What is Durable Concrete?What is Durable

Chao, Shih-Ho

369

Phased array compaction cell for measurement of the transversely isotropic elastic properties of compacting sediments  

SciTech Connect (OSTI)

Sediments undergoing compaction typically exhibit transversely isotropic (TI) elastic properties. We present a new experimental apparatus, the phased array compaction cell, for measuring the TI elastic properties of clay-rich sediments during compaction. This apparatus uses matched sets of P- and S-wave ultrasonic transducers located along the sides of the sample and an ultrasonic P-wave phased array source, together with a miniature P-wave receiver on the top and bottom ends of the sample. The phased array measurements are used to form plane P-waves that provide estimates of the phase velocities over a range of angles. From these measurements, the five TI elastic constants can be recovered as the sediment is compacted, without the need for sample unloading, recoring, or reorienting. This paper provides descriptions of the apparatus, the data processing, and an application demonstrating recovery of the evolving TI properties of a compacting marine sediment sample.

Nihei, K.T.; Nakagawa, S.; Reverdy, F.; Meyer, L.R.; Duranti, L.; Ball, G.

2010-12-15T23:59:59.000Z

370

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

371

Addendum to the Closure Report for Corrective Action Unit 404: Roller Coaster Lagoons and Trench, Tonopah Test Range, Nevada, Revision 0  

SciTech Connect (OSTI)

This document constitutes an addendum to the September 1998, Closure Report for Corrective Action Unit 404: Roller Coaster Lagoons and Trench, Tonopah Test Range, Nevada as described in the document Recommendations and Justifications for Modifications for Use Restrictions Established under the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office Federal Facility Agreement and Consent Order (UR Modification document) dated February 2008. The UR Modification document was approved by NDEP on February 26, 2008. The approval of the UR Modification document constituted approval of each of the recommended UR modifications. In conformance with the UR Modification document, this addendum consists of: • This cover page that refers the reader to the UR Modification document for additional information • The cover and signature pages of the UR Modification document • The NDEP approval letter • The corresponding section of the UR Modification document This addendum provides the documentation justifying the cancellation of the URs for: • CAS TA-03-001-TARC Roller Coaster Lagoons • CAS TA-21-001-TARC Roller Coaster N. Disposal Trench These URs were established as part of Federal Facility Agreement and Consent Order (FFACO) corrective actions and were based on the presence of contaminants at concentrations greater than the action levels established at the time of the initial investigation (FFACO, 1996; as amended August 2006). Since these URs were established, practices and procedures relating to the implementation of risk-based corrective actions (RBCA) have changed. Therefore, these URs were re-evaluated against the current RBCA criteria as defined in the Industrial Sites Project Establishment of Final Action Levels (NNSA/NSO, 2006c). This re-evaluation consisted of comparing the original data (used to define the need for the URs) to risk-based final action levels (FALs) developed using the current Industrial Sites RBCA process. The re-evaluation resulted in a recommendation to modify these URs to administrative URs. Administrative URs differ from standard URs in that they do not require onsite postings (i.e., signs) or other physical barriers (e.g., fencing, monuments), and they do not require periodic inspections (see Section 6.2 of the Industrial Sites Project Establishment of Final Action Levels [NNSA/NSO, 2006c]). These Administrative URs were based on a “Remote Work Sites” future land use scenario that was used to calculate the FAL. The administrative UR will protect workers from an exposure exceeding that used in the calculation of the FAL (i.e., 336 hours per year). Any proposed activity within these use restricted areas that would potentially cause an exposure exceeding this exposure limit would require approval from the Nevada Division of Environmental Protection (NDEP). Requirements for inspecting and maintaining these URs will be canceled, and the postings and signage at each site will be removed. Fencing and posting may be present at these sites that are unrelated to the FFACO URs such as for radiological control purposes as required by the NV/YMP Radiological Control Manual (NNSA/NSO, 2004f). This modification will not affect or modify any non-FFACO requirements for fencing, posting, or monitoring at these sites.

Lynn Kidman

2008-10-01T23:59:59.000Z

372

Cylindrically Symmetric Models of Anisotropic Compact Stars  

E-Print Network [OSTI]

In this paper we have discussed the possibility of forming anisotropic compact stars from cosmological constant as one of the competent candidates of dark energy with cylindrical symmetry. For this purpose, we have applied the analytical solution of Krori and Barua metric to a particular cylindrically symmetric spacetime. The unknown constants in Krori and Barua metric have been determined by using masses and radii of class of compact stars like 4$U$1820-30, Her X-1, SAX J 1808-3658. The properties of these stars have been analyzed in detail. In this setting the cosmological constant has been taken as a variable which depends on the radial coordinates. We have checked all the regularity conditions, stability and surface redshift of the compact stars 4$U$1820-30, Her X-1, SAX J 1808-3658.

G. Abbas; Sumara Nazeer; M. A. Meraj

2014-12-16T23:59:59.000Z

373

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

374

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

375

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

376

Report on aging of nuclear power plant reinforced concrete structures  

SciTech Connect (OSTI)

The Structural Aging Program provides the US Nuclear Regulatory Commission with potential structural safety issues and acceptance criteria for use in continued service assessments of nuclear power plant safety-related concrete structures. The program was organized under four task areas: Program Management, Materials Property Data Base, Structural Component Assessment/Repair Technology, and Quantitative Methodology for Continued Service Determinations. Under these tasks, over 90 papers and reports were prepared addressing pertinent aspects associated with aging management of nuclear power plant reinforced concrete structures. Contained in this report is a summary of program results in the form of information related to longevity of nuclear power plant reinforced concrete structures, a Structural Materials Information Center presenting data and information on the time variation of concrete materials under the influence of environmental stressors and aging factors, in-service inspection and condition assessments techniques, repair materials and methods, evaluation of nuclear power plant reinforced concrete structures, and a reliability-based methodology for current and future condition assessments. Recommendations for future activities are also provided. 308 refs., 61 figs., 50 tabs.

Naus, D.J.; Oland, C.B. [Oak Ridge National Lab., TN (United States); Ellingwood, B.R. [Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Civil Engineering

1996-03-01T23:59:59.000Z

377

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

378

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

379

Treatment of fly ash for use in concrete  

SciTech Connect (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

380

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

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

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

382

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

383

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

384

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

385

Compact Ultradense Objects in the Solar System  

E-Print Network [OSTI]

We describe properties and gravitational interactions of meteor-mass and greater compact ultra dense objects with nuclear density or greater (CUDO s). We discuss possible enclosure of CUDO s in comets, stability of these objects on impact with the Earth and Sun and show that the hypothesis of a CUDO core helps resolve issues challenging the understanding of a few selected cometary impacts.

J. Rafelski; Ch. Dietl; L. Labun

2013-03-19T23:59:59.000Z

386

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 progress. We can realistically envision a world without extreme poverty by the year 2025 because. Sachs, The End of Poverty, 2005. WORLD ECONOMICS · Vol. 6 · No. 4 · October­December 2005 11 Jeffrey D

387

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

388

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

389

The Effect of Elevated Temperature on Concrete Materials and Structures - a Literature Review.  

SciTech Connect (OSTI)

The objective of this limited study was to provide an overview of the effects of elevated temperature on the behavior of concrete materials and structures. In meeting this objective the effects of elevated temperatures on the properties of ordinary Portland cement concrete constituent materials and concretes are summarized. The effects of elevated temperature on high-strength concrete materials are noted and their performance compared to normal strength concretes. A review of concrete materials for elevated-temperature service is presented. Nuclear power plant and general civil engineering design codes are described. Design considerations and analytical techniques for evaluating the response of reinforced concrete structures to elevated-temperature conditions are presented. Pertinent studies in which reinforced concrete structural elements were subjected to elevated temperatures are described.

Naus, Dan J [ORNL

2006-03-01T23:59:59.000Z

390

Meso-Scale Model for Simulations of Concrete Subjected to Cryogenic Temperatures  

E-Print Network [OSTI]

software ABAQUS. In this model, concrete is considered as a 3- phase composite material in a meso-scale structure: mortar matrix, aggregate, and interfacial transmission zone (ITZ). The Concrete Damage Plasticity model in ABAQUS is used to represent...

Masad, Noor Ahmad

2013-07-17T23:59:59.000Z

391

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

392

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

393

Seismic vulnerability of older reinforced concrete frame structures in Mid-America  

E-Print Network [OSTI]

This research quantifies the seismic vulnerability of older reinforced concrete frame structures located in Mid-America. After designing a representative three-story gravity load designed reinforced concrete frame structure, a nonlinear analytical...

Beason, Lauren Rae

2004-09-30T23:59:59.000Z

394

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

395

Evaluation of Economic Impact of Three-Dimensional Modeling in Precast Concrete Engineering  

E-Print Network [OSTI]

Evaluation of Economic Impact of Three-Dimensional Modeling in Precast Concrete Engineering Rafael (IT); Concrete, precast; Economic factors; Three-dimensional models. Introduction "The application to this; but the funda- mental reason undoubtedly was economic." (Mitchell 1977). Intuitive assessments

Sacks, Rafael

396

Seismic fragility curves for reinforced concrete A Dissertation Submitted in Partial Fulfilment of the Requirements  

E-Print Network [OSTI]

Seismic fragility curves for reinforced concrete buildings A Dissertation Submitted in Partial dissertation entitled "Seismic fragility curves for reinforced concrete frame and wall- frame buildings. Buildings designed for seismic loading, and buildings designed only for gravity loads, are considered

397

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

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

southbound on US-169 are coming from the gravel pits, concrete plants, and waste disposal facilities just north Summary: to raveling of the asphalt at the concrete-asphalt...

398

The use of nondestructive testing methods for the condition assessment of concrete bridge girders  

E-Print Network [OSTI]

There are over 594,000 publicly controlled bridges in the United States. Concrete and pre-stressed concrete bridges account for nearly 50% of the bridges in the US inventory. This proportion is increasing each year, as new ...

Unruh, Richard Cornelius, 1974-

2004-01-01T23:59:59.000Z

399

Practical limitations of single-span ultra-high performance concrete beams  

E-Print Network [OSTI]

Since its development in the early 1970's, researchers have continued to push the limits of concrete mixtures through the creation of ultra-high performance concretes. The use of this class of materials has allowed designers ...

Abrams, Daniel Scott

2013-01-01T23:59:59.000Z

400

Tall concrete buildings subject to vertically moving fires: A case study approach   

E-Print Network [OSTI]

regarded as safe in a fire situation as concrete is non-flammable and exhibits highly insulating material properties. The majority of current research relating to the impact of fire on structures examines other forms of construction. Research of concrete...

Fletcher, Ian A

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

Investigation of Conditions for Moisture Damage in Asphalt Concrete and Appropriate Laboratory Test Methods  

E-Print Network [OSTI]

of Asphalt Concrete-Physical Testing. ” Final Report, #930-of Asphalt Concrete: Chemical Testing. ” Alabama Highwayconcrete mixes, it is preferred to use a mix that would have good moisture resistance under laboratory testing

Lu, Qing

2005-01-01T23:59:59.000Z

402

Lateral behavior of reinforced concrete columns supported on Type II shafts  

E-Print Network [OSTI]

concrete strength reached the desired strength on the day of testingconcrete and reinforcing steel during the construction period and on the day of column-shaft assembly testing.during testing. However, the cracking of the concrete at the

Liu, Yujia

2012-01-01T23:59:59.000Z

403

Experimental and Analytical Investigation of Reinforced Concrete Columns Subjected to Horizontal and Vertical Ground Motions  

E-Print Network [OSTI]

errors in concrete sampling and testing these cylinders areprocedure for concrete cylinder making and testing. Cylinderconcrete stress-strain relationship on the 72 day (1 cylinder) 3.21 Testing

Lee, Hyerin

2011-01-01T23:59:59.000Z

404

Investigation of Conditions for Moisture Damage in Asphalt Concrete and Appropriate Laboratory Test Methods  

E-Print Network [OSTI]

of Asphalt Concrete-Physical Testing. ” Final Report no.of Asphalt Concrete: Chemical Testing. ” Alabama Highwayconcrete mixes, it is preferable to use a mix that would have good moisture resistance under laboratory testing

Harvey, John T; Lu, Qing

2005-01-01T23:59:59.000Z

405

Effects of environment and construction procedures on concrete pavement surfaces  

E-Print Network [OSTI]

on the consolidation of concrete, most of these are related to beams, 1-7"- columns, floor slabs, and dams. Reports in the areas of con- crete pavement consolidation arc somewhat limited in number. * Supersc -ipt Arabic numbers throughout this thesis refer... be durable, structurally sound, and safe (provide ample ance) . To this end, a study was conducted to d ve) o) i improv '. d construction prattler s rel ated to th consolidation, f. 'nishing, and cu. ing of Continuously Reinforced Concrete Pavemont, s (CR...

Wrbas, Ronald Otto

1972-01-01T23:59:59.000Z

406

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.

407

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

408

Quick setting water-compatible furfuryl alcohol polymer concretes  

DOE Patents [OSTI]

A novel quick setting polymer concrete composite comprising a furfuryl alcohol monomer, an aggregate containing a maximum of 8% by weight water, and about 1-10% trichlorotoluene initiator and about 20-80% powdered metal salt promoter, such as zinc chloride, based on the weight of said monomer, to initiate and promote polymerization of said monomer in the presence of said aggregate, within 1 hour after mixing at a temperature of -20.degree. C. to 40.degree. C., to produce a polymer concrete having a 1 hour compressive strength greater than 2000 psi.

Sugama, Toshifumi (Ridge, NY); Kukacka, Lawrence E. (Port Jefferson, NY); Horn, William H. (Brookhaven, NY)

1982-11-30T23:59:59.000Z

409

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...

410

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

411

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

412

E-Print Network 3.0 - air entrained concrete Sample Search Results  

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

; Materials Science 10 By-Products Utilization Summary: . Keywords: aggregates, air entrainment, autogenous shrinkage, compressive strength, concretes, drying... on...

413

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

414

The influence of abstract and concrete mindsets on anticipating and guiding others' self-regulatory effortsq  

E-Print Network [OSTI]

The influence of abstract and concrete mindsets on anticipating and guiding others' self the impact of abstract and concrete mindsets on attention to goal-relevant aspects of others' situations. An abstract (relative to a concrete) mindset, by making accessible the cognitive operation of considering

Freitas, Antonio L.

415

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

416

A model for reactive porous transport during re-wetting of hardened concrete  

E-Print Network [OSTI]

A model for reactive porous transport during re-wetting of hardened concrete Michael Chapwanya residing in the porous concrete matrix. The main hypothesis in this model is that the reaction product hydration; Porous media; Reaction-diffusion equations; Vari- able porosity. 1. Introduction Concrete

Stockie, John

417

A poroplastic model for hygro-chemo-mechanical damage of concrete M. Cuomo & A. Nicolosi  

E-Print Network [OSTI]

and to the prediction of long term response of concrete constructions. The crystalline and porous microstruc- tureA poroplastic model for hygro-chemo-mechanical damage of concrete M. Cuomo & A. Nicolosi Department an analytical model for calcium leaching of concrete due to water. The model is set in the framework

Paris-Sud XI, Université de

418

A MOVING-BOUNDARY PROBLEM FOR CONCRETE CARBONATION: GLOBAL EXISTENCE AND UNIQUENESS OF  

E-Print Network [OSTI]

in a porous solid ­ concrete ­ which incorporates slow diffusive transport, interfacial exchange between wet of gaseous CO2 from the atmosphere penetrate the concrete via the unsaturated porous matrix. After enteringA MOVING-BOUNDARY PROBLEM FOR CONCRETE CARBONATION: GLOBAL EXISTENCE AND UNIQUENESS OF WEAK

Eindhoven, Technische Universiteit

419

Concrete calcium leaching at variable temperature: experimental data and numerical model inverse  

E-Print Network [OSTI]

, concrete porous solution is very basic (pH around 13) and several ionic species are highly concentrated [1Concrete calcium leaching at variable temperature: experimental data and numerical model inverse/DSU/SSIAD/BERIS, Fontenay-aux-Roses, France Abstract A simplified model for calcium leaching in concrete is presented

Paris-Sud XI, Université de

420

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

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

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.

422

LIFE CYCLE ASSESSMENT OF A HEMP CONCRETE WALL: IMPACT OF THICKNESS AND COATING.  

E-Print Network [OSTI]

LIFE CYCLE ASSESSMENT OF A HEMP CONCRETE WALL: IMPACT OF THICKNESS AND COATING. Sylvie PRETOT, this study concerns the LCA of an environmentally friendly material used for building construction, hemp construction materials, hemp concrete has a low impact on environment. Moreover, hemp concrete contributes

Paris-Sud XI, Université de

423

Concrete properties evaluation by statistical fusion of NDT techniques Zoubir Mehdi Sbartaa  

E-Print Network [OSTI]

1 Concrete properties evaluation by statistical fusion of NDT techniques Zoubir Mehdi Sbartaïa (NDT) techniques are affected in different ways by concrete properties such as porosity, complexity of the pore network, water content, strength, etc. Therefore, extracting one concrete property from one NDT

Boyer, Edmond

424

Concrete Pavement I-285 under 5th runway at Hartsfield Jackson  

E-Print Network [OSTI]

Concrete Pavement Sweet as a James Page I-285 under 5th runway at Hartsfield Jackson International Concrete Paving project I-285 East Perimeter Fiscal 2012 GDOT placed 205,704 square yards of RCC Pavement Portland Cement Concrete Pavement State Route 96 Crawford / Peach Counties I-75 Tift County CRC Lane

425

An experimental evaluation of two effective medium theories for ultrasonic wave propagation in concrete  

E-Print Network [OSTI]

in concrete Jean-François Chaix*, Mathieu Rossat, Vincent Garnier, Gilles Corneloup. Laboratoire de and experimental data in concrete. As a consequence of its composition and manufacturing process, this material has of longitudinal waves to be described at the scale of materials such as concrete. The validity limits

Paris-Sud XI, Université de

426

Making the abstract concrete 1 Running head: VISUALIZING MATHEMATICAL SOLUTION PROCEDURES  

E-Print Network [OSTI]

Making the abstract concrete 1 Running head: VISUALIZING MATHEMATICAL SOLUTION PROCEDURES Making the Abstract Concrete: Visualizing Mathematical Solution Procedures Katharina Scheiter University of Tuebingen) (2006) 9-25" DOI : 10.1016/j.chb.2005.01.009 #12;Making the abstract concrete 2 Abstract This article

Paris-Sud XI, Université de

427

E. F. Redish 1 DTS Proposal Learning the Language of Science: Advanced Math for Concrete Thinkers  

E-Print Network [OSTI]

E. F. Redish 1 DTS Proposal Learning the Language of Science: Advanced Math for Concrete Thinkers, differential equations, and Fourier transforms, many concrete thinkers find these topics to be insurmount- able to teach abstract math to concrete thinkers could have a broad impact beyond physics. Many fields

Maryland at College Park, University of

428

Numerical determination of the tensile response and the dissipated fracture energy of concrete: role of the  

E-Print Network [OSTI]

Numerical determination of the tensile response and the dissipated fracture energy of concrete concrete can be considered as a mix of coarse aggregates with a mortar paste matrix. In this paper we of concrete. Each coarse aggregate is assumed to be circular with six different radiuses following

Paris-Sud XI, Université de

429

SERVICEABILITY OF CONCRETE BEAMS PRESTRESSED BY CARBON FffiRE REINFORCED PLASTIC .RODS  

E-Print Network [OSTI]

SERVICEABILITY OF CONCRETE BEAMS PRESTRESSED BY CARBON FffiRE REINFORCED PLASTIC .RODS A of Manitoba to study the serviceability of concrete beams prestressed by carbon fibre reinforced plastic (CFRP) rods. The experimental program consisted of eight concrete beams prestressed by CFRP rods and two

430

A continuum damage modelling of quasi-static fatigue strength of plain concrete  

E-Print Network [OSTI]

A continuum damage modelling of quasi-static fatigue strength of plain concrete S. H. Maia,b , F of concrete. The approach is based on the framework of continuum damage mechanics where the fatigue model fatigue tests have been performed on a concrete the formulation of which is close to the one used

Paris-Sud XI, Université de

431

The Role of Concrete Marine Structures in the Recovery of Energy and Natural Resources from the  

E-Print Network [OSTI]

The Role of Concrete Marine Structures in the Recovery of Energy and Natural Resources from Concrete materials are derived from some of the most abundant and economically available sources on this planet. Recent advancements in the development of concrete technology related to the durability, strength

Frandsen, Jannette B.

432

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

E-Print Network [OSTI]

OF CONCRETE2 3 Alexandre Pavoine, David Harbec, Thierry Chaussadent, Arezki Tagnit-Hamou and Loïc4 Divet5. The subject of his PhD thesis was the risk of development of Delayed9 Ettringite Formation in concretes. His research interests include durability of concrete and the10 development of alternative materials

433

Running head: CONCRETE PROSOCIAL GOALS MAXIMIZE HAPPINESS 1 Getting the Most out of Giving  

E-Print Network [OSTI]

Running head: CONCRETE PROSOCIAL GOALS MAXIMIZE HAPPINESS 1 Getting the Most out of Giving: Concretely Framing a Prosocial Goal Maximizes Happiness Melanie Rudda University of Houston Jennifer Aakerb Melcher Hall, Houston, TX 77204-6021; Email: mrrudd@bauer.uh.edu; Phone: 713.743.4572. #12;CONCRETE

Bogyo, Matthew

434

QUALIFICATION OF A TRULY DISTRIBUTED FIBER OPTIC TECHNIQUE FOR STRAIN AND TEMPERATURE MEASUREMENTS IN CONCRETE STRUCTURES  

E-Print Network [OSTI]

MEASUREMENTS IN CONCRETE STRUCTURES J.M. Henault1 , J. Salin1 , G. Moreau1 , S. Delepine-Lesoille2 , J. Bertand with different materials targeting to last for decades, either embedded in the concrete or attached to the surface of the structure. They must ensure an optimal transfer of temperature and strain from the concrete

Paris-Sud XI, Université de

435

Hybrid Control Charts for Active Control and Monitoring of Concrete Strength  

E-Print Network [OSTI]

Hybrid Control Charts for Active Control and Monitoring of Concrete Strength Busaba Laungrungrong1 ; Barzin Mobasher2 ; Douglas Montgomery3 ; and Connie M. Borror4 Abstract: Concrete is the most widely used the efficiency of a concrete production process. Statistical process control is generally applied to gain

Mobasher, Barzin

436

MODELLING OF CONCRETE STRUCTURES AFFECTED BY INTERNAL SWELLING REACTIONS: COUPLINGS BETWEEN  

E-Print Network [OSTI]

Page 1 MODELLING OF CONCRETE STRUCTURES AFFECTED BY INTERNAL SWELLING REACTIONS: COUPLINGS BETWEEN of the affected concrete that generally leads to cracking and decrease of its mechanical properties of the concrete works and structural integrity. To manage with considered suffering structures, it is necessary

Paris-Sud XI, Université de

437

Concrete Structure Design Using Mixed-Integer Nonlinear Programming with Complementarity Constraints  

E-Print Network [OSTI]

Concrete Structure Design Using Mixed-Integer Nonlinear Programming with Complementarity) formulation to achieve minimum-cost designs for reinforced concrete (RC) structures that satisfy building code requirements. The objective function includes material and labor costs for concrete, steel reinforcing bars

438

Peel and Shear Fracture Characterization of Debonding in FRP Plated Concrete Affected by Moisture  

E-Print Network [OSTI]

polymer CFRP plated concrete systems by mechanically testing accelerated moisture conditioned mesoscalePeel and Shear Fracture Characterization of Debonding in FRP Plated Concrete Affected by Moisture fracture toughness as the quantification parameter of the CFRP-epoxy-concrete trilayer system, which

Entekhabi, Dara

439

[ ]May 2014 Portland cement concrete (PCC) overlays have been used with great success in many locations  

E-Print Network [OSTI]

accelerated pavement testing on bonded concrete overlay pavements to be constructed at the Pavement Research testing; evaluate the structural bearing capacity of the concrete overlay pavement structures[ ]May 2014 PROBLEM Portland cement concrete (PCC) overlays have been used with great success

Harms, Kyle E.

440

Edinburgh Research Explorer The Dalmarnock Fire Tests on a Cast Insitu Concrete Structure  

E-Print Network [OSTI]

Edinburgh Research Explorer The Dalmarnock Fire Tests on a Cast Insitu Concrete Structure Citation Fire Tests on a Cast Insitu Concrete Structure'. in Proceedings of the international Workshop Fire THE DALMARNOCK FIRE TESTS ON A CAST INSITU CONCRETE STRUCTURE Susan Deeny PhD Student University of Edinburgh, UK

Millar, Andrew J.

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

FRP Dowels for Concrete Pavements Darren Eddie, Junior Structural Engineer, Reid Crowther & Partners;  

E-Print Network [OSTI]

testing ofGFRP and steel dowels using a model of a concrete pavement slab joint subjected to static= L FRP Dowels for Concrete Pavements By Darren Eddie, Junior Structural Engineer, Reid Crowther - Introduction Joints are used in concrete pavements in order to control cracking due to thermal

442

Concrete international /DECEMBER 2004 33 BY EDWARD J. GARBOCZI, JEFFREY W. BULLARD, AND DALE P. BENTZ  

E-Print Network [OSTI]

with virtual testing will result in tremendous time and cost savings to the cement and concrete industry of the National Institute of Standards and Technology (NIST)/Industry Virtual Cement and Concrete Testing's work follows, along with a general overview of what virtual testing of cement and concrete actually

Bentz, Dale P.

443

Application of digital image correlation to size effect tests of concrete S. Yasir Alam & A. Loukili  

E-Print Network [OSTI]

Application of digital image correlation to size effect tests of concrete S. Yasir Alam & A beams. Three point bending tests are performed on scaled concrete beams in accordance with RILEM rec, reactor containments, bridges) and of labora- tory tests. In concrete structures, fracture is generally

Paris-Sud XI, Université de

444

Laboratory Testing to Address the Potential for Damaging Hydraulic Pressure in the Concrete Tie Rail Seat  

E-Print Network [OSTI]

Laboratory Testing to Address the Potential for Damaging Hydraulic Pressure in the Concrete Tie of different combinations of concrete ties and fastening system components to RSD (1). TTC's tests resulted) is the most critical problem with concrete tie performance on North American freight railroads. Currently

Illinois at Urbana-Champaign, University of

445

Fracture Behavior and Properties of Functionally Graded Fiber-Reinforced Concrete  

E-Print Network [OSTI]

the structural benefits of functionally graded concrete materials (FGCM) for rigid pavements by testing (testing and modeling) demonstrates the viability of FGCM for designing layered concrete pavements systemFracture Behavior and Properties of Functionally Graded Fiber-Reinforced Concrete Jeffery Roesler

Paulino, Glaucio H.

446

Monitoring of the creep and the relaxation hhh behaviour of concrete since setting time, hh hhhhhhhh  

E-Print Network [OSTI]

experimental tests on the same ordinary concrete in order to investigate the early age mechanical behaviour in the laboratory of civil engineering at ULB for testing concrete in tension or in compression since setting time), France (2012)" #12;2 2. Test setup 2.1. Tested concrete description The mixture proportions

Paris-Sud XI, Université de

447

Keynote Paper, Shah, Page 1/13 HEALTH MONITORING OF EARLY AGE CONCRETE  

E-Print Network [OSTI]

relationship to the actual concrete in the structure. This calls for nondestructive test methods that offer potential for the application of nondestructive testing of concrete under field conditions. The resultsKeynote Paper, Shah, Page 1/13 HEALTH MONITORING OF EARLY AGE CONCRETE Thomas Voigt, Zhihui Sun

448

IDENTIFICATION OF INHOMOGENEOUS CONCRETE COVER BY NON-CONTACT ULTRASONIC METHOD  

E-Print Network [OSTI]

their irreversible damage. Various methods are available today for testing concrete structures. Among themIDENTIFICATION OF INHOMOGENEOUS CONCRETE COVER BY NON- CONTACT ULTRASONIC METHOD B.Piwakowski1 , Q Science, Kazimierz Wielki University, Bydgoszcz, Poland bogdan.piwakowski@ec-lille.fr ABSTRACT Concrete

Boyer, Edmond

449

Non Destructive Testing of Concrete: Transfer from Laboratory to On-site Measurement  

E-Print Network [OSTI]

Non Destructive Testing of Concrete: Transfer from Laboratory to On-site Measurement Vincent Vincent.garnier@univ-amu.fr ABSTRACT The evaluation of mechanical and chemical properties of concrete laws from the laboratory between non-destructive measurements and characteristics of the concrete

Boyer, Edmond

450

Virtual Cement and Concrete Testing Laboratory Educational Version 2.0 User Guide  

E-Print Network [OSTI]

1 Virtual Cement and Concrete Testing Laboratory Educational Version 2.0 User Guide Jeffrey W of the Virtual Cement and Concrete Testing Laboratory (VCCTL) software, version 2.0. Using the VCCTL software, cement hydration, computer modeling, concrete testing, microstructure, simulation, virtual laboratory

Magee, Joseph W.

451

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

452

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.

453

A study of compaction methods for lunar soil simulants  

E-Print Network [OSTI]

, compaction by vibration, compaction under vacuum pressure under the simultaneous effect of vibration are examined. Duc to the increasing confining pressure, the air voids decrease and the particles will be more closely packed, thus increasing the relative... density. The research will be used to identify a convenient method for compacting samples for laboratory digging experiments. The results of the research conclude that compaction by using vacuum and vibration produce results which can be used to predict...

Ekkad, Rama Varadarajan

1993-01-01T23:59:59.000Z

454

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

455

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

456

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.

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

2014-09-01T23:59:59.000Z

457

Concrete Company Aims Higher for More Wind Energy  

Broader source: Energy.gov [DOE]

Today, most steel towers that support utility-scale turbines stand about 80 meters tall, but the Tindall Corporation wants to go higher using precast concrete to raise turbines over 100 meters in height to capture stronger, steadier winds - and more energy.

458

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.

459

Concrete Strength Data 1 0.45 2954  

E-Print Network [OSTI]

.5 2739 7 0.55 2652 8 0.55 2607 9 0.55 2583 0 #12;Response: Concrete Compressive Strength Summary of Fit.963004 26.75521 2765.889 9 Lack of Fit Source Lack of Fit Pure Error Total Error DF 1 6 7 Sum of Squares 672>F Press 8682.2673817 x 2 #12;

Vardeman, Stephen B.

460

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

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

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

462

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

463

Light weight concrete: 226 K contents and dose  

E-Print Network [OSTI]

gamma spectrometry. All the radionuclide contents except those for the PFA autoclave aerated concrete been determined using high- resolution gamma spectrometry. The results have been compared with thoseÀ1 for construction materials for dwellings. The gamma-dose rate for an indoor environment

Yu, K.N.

464

Crack-based analysis of concrete with brittle reinforcement  

E-Print Network [OSTI]

{ FaberMaunsell Ltd; University of Cambridge Brittle reinforcement (such as fibre-reinforced plastic to the surround- ing concrete, at a crack surface sL=sR s on the left/right side of a crack u increase in unbonded

Burgoyne, Chris

465

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

466

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.

467

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

468

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.

469

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

470

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

471

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

472

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

473

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

474

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

475

The concrete road : development and present status of design and construction  

E-Print Network [OSTI]

of Temperature and Trafiic 21 2. Impact 2? 3. Fatigue of Concrete C. Design of Concrete Pavements 44 1. Cross-Sections of Concrete Slabs 45 2. Stresses in Concrete Pavements - Thick­ ness of Slab 5o 3. Defects in Concrete Pavement Slabs - Con­ trol... 36 * 12. Static Loading Curve. Fatigue Test Method .. 38 " 13. Fatigue Endurance -^irnit of Cement Mortar Beams 39 * 14. Effect of prolonged Rest Period 4o 15. Effect of Increasing the Load during Fatigue Action 42 16. Typical Cross...

Puell, Heinz Werner

1935-01-01T23:59:59.000Z

476

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]

of Restrained Shrinkage Cracking of Concrete Materials," 15th International Glass Fibre Reinforced Concrete Fibers in Suppression of Restrained Shrinkage Cracking of Concrete Materials Chote Soranakom1 , Mehdi resistance of concrete subjected to drying shrinkage is studied by experimental and analytical approaches

Mobasher, Barzin

477

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

478

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

479

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.

480

A laboratory investigation of vibratory compaction of dry soils  

E-Print Network [OSTI]

. Standard Compaction Curve for Soil 3 (CL) 48 49 50 53 54 56 25 Effect of Frequency Variation on the Time Required to Achieve I/2 inch (12. 7 mm) of Settlement 57 26. Foot Size Effects on Compaction of Various Soils 59 27. Effect of Frequency... on the Compaction of Soil 1 (SP) Using Two Different Feet 63 28. Effect of Frequency on the Compaction of Soil 1 (SP) Using the Semi-Circular Foot with Various Static Weights 64 29. Effect of Frequency on the Compaction of Soil 1 (SP) Using the 5 Inch Diameter...

Webster, Cecil Ray

1984-01-01T23:59:59.000Z

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.


481

Addendum to the Closure Report for Corrective Action Unit 404: Roller Coaster Sewage Lagoons and North Disposal Trench, Tonopah Test Range, Nevada, Revision 1  

SciTech Connect (OSTI)

This document constitutes an addendum to the September 1998, Closure Report for Corrective Action Unit 404: Roller Coaster Lagoons and Trench, Tonopah Test Range, Nevada as described in the document Recommendations and Justifications for Modifications for Use Restrictions Established under the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office Federal Facility Agreement and Consent Order (UR Modification document) dated February 2008. The UR Modification document was approved by NDEP on February 26, 2008. The approval of the UR Modification document constituted approval of each of the recommended UR modifications. In conformance with the UR Modification document, this addendum consists of: • This cover page that refers the reader to the UR Modification document for additional information • The cover and signature pages of the UR Modification document • The NDEP approval letter • The corresponding section of the UR Modification document This addendum provides the documentation justifying the modification of the UR for CAS TA-03-001-TARC Roller Coaster Lagoons. This UR was established as part of Federal Facility Agreement and Consent Order (FFACO) corrective actions and was based on the presence of contaminants at concentrations greater than the action levels established at the time of the initial investigation (FFACO, 1996; as amended August 2006). Since this UR was established, practices and procedures relating to the implementation of risk-based corrective actions (RBCA) have changed. Therefore, this UR was re-evaluated against the current RBCA criteria as defined in the Industrial Sites Project Establishment of Final Action Levels (NNSA/NSO, 2006c). This reevaluation consisted of comparing the original data (used to define the need for the UR) to risk-based final action levels (FALs) developed using the current Industrial Sites RBCA process. The re-evaluation resulted in a recommendation to modify the UR for CAS TA-03-001-TARC to an administrative UR. Administrative URs differ from standard URs in that they do not require onsite postings (i.e., signs) or other physical barriers (e.g., fencing, monuments), and they do not require periodic inspections (see Section 6.2 of the Industrial Sites Project Establishment of Final Action Levels [NNSA/NSO, 2006c]). This Administrative UR was based on a “Remote Work Sites” future land use scenario that was used to calculate the FAL. The administrative UR will protect workers from an exposure exceeding that used in the calculation of the FAL (i.e., 336 hours per year). Any proposed activity within these use restricted areas that would potentially cause an exposure exceeding this exposure limit would require approval from the Nevada Division of Environmental Protection (NDEP). Requirements for inspecting and maintaining this UR will be canceled, and the postings and signage at each site will be removed. Fencing and posting may be present at these sites that are unrelated to the FFACO URs such as for radiological control purposes as required by the NV/YMP Radiological Control Manual (NNSA/NSO, 2004f). This modification will not affect or modify any non-FFACO requirements for fencing, posting, or monitoring at these sites.

Lynn Kidman

2009-02-01T23:59:59.000Z

482

HOSNY, AMR. Behavior of Concrete Members Containing Lightweight Synthetic Particles. (Under the direction of Dr. Sami Rizkalla.)  

E-Print Network [OSTI]

ABSTRACT HOSNY, AMR. Behavior of Concrete Members Containing Lightweight Synthetic Particles of Lightweight Synthetic Particles (LSP) to normal weight concrete leads to reduction of the unit weight of the concrete by 10 to 20 percent resulting in concrete with unit weights ranging between 120 and 130 lb/ft3

483

Mertol, Rizkalla, Zia and Mirmiran 2006 CBC FLEXURAL DESIGN USING HIGH-STRENGTH CONCRETE UP TO 20 KSI  

E-Print Network [OSTI]

Mertol, Rizkalla, Zia and Mirmiran 2006 CBC 1 FLEXURAL DESIGN USING HIGH-STRENGTH CONCRETE UP TO 20 findings of the fundamental characteristics of high-strength concrete for the flexural design of bridge Design Specifications to extend the use of concrete strength up to 18 ksi. A total of 15 plain concrete

484

The jet impingement phase of molten core-concrete interactions  

SciTech Connect (OSTI)

Scoping calculations have been carried out demonstrating that a significant and abrupt reduction in the corium temperature may be realized when molten corium drains as a jet from a localized breach in the RPV lower head to impinge upon the concrete basemat. The temperature decrease may range from a value of approx.170 K (approx.140 K) for limestone (basaltic) aggregate concrete to a value approaching the initial corium superheat depending upon whether the forced convection impingement heat flux is assumed to be controlled by either thermal conduction across a slag film layer or the temperature boundary condition represented by a corium crust. The magnitude of the temperature reduction remains significant as the initial corium temperature, impinging corium mass, and initial localized breach size are varied over their range of potential values.

Sienicki, J.J.; Spencer, B.W.

1986-01-01T23:59:59.000Z

485

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

E-Print Network [OSTI]

of concrete mixtures in the laboratory tested in accordance with ASTM C 157. The evaluation of shrinkage properties includes a total of 56 individual concrete batches. Both a high-absorption (2.5 to 3.0%) coarse aggregate and a low-absorption (less than 0...

Lindquist, Will David

2008-01-01T23:59:59.000Z

486

Raytheon's next generation compact inline cryocooler architecture  

SciTech Connect (OSTI)

Since the 1970s, Raytheon has developed, built, tested and integrated high performance cryocoolers. Our versatile designs for single and multi-stage cryocoolers provide reliable operation for temperatures from 10 to 200 Kelvin with power levels ranging from 50 W to nearly 600 W. These advanced cryocoolers incorporate clearance seals, flexure suspensions, hermetic housings and dynamic balancing to provide long service life and reliable operation in all relevant environments. Today, sensors face a multitude of cryocooler integration challenges such as exported disturbance, efficiency, scalability, maturity, and cost. As a result, cryocooler selection is application dependent, oftentimes requiring extensive trade studies to determine the most suitable architecture. To optimally meet the needs of next generation passive IR sensors, the Compact Inline Raytheon Stirling 1-Stage (CI-RS1), Compact Inline Raytheon Single Stage Pulse Tube (CI-RP1) and Compact Inline Raytheon Hybrid Stirling/Pulse Tube 2-Stage (CI-RSP2) cryocoolers are being developed to satisfy this suite of requirements. This lightweight, compact, efficient, low vibration cryocooler combines proven 1-stage (RS1 or RP1) and 2-stage (RSP2) cold-head architectures with an inventive set of warm-end mechanisms into a single cooler module, allowing the moving mechanisms for the compressor and the Stirling displacer to be consolidated onto a common axis and in a common working volume. The CI cryocooler is a significant departure from the current Stirling cryocoolers in which the compressor mechanisms are remote from the Stirling displacer mechanism. Placing all of the mechanisms in a single volume and on a single axis provides benefits in terms of package size (30% reduction), mass (30% reduction), thermodynamic efficiency (>20% improvement) and exported vibration performance (?25 mN peak in all three orthogonal axes at frequencies from 1 to 500 Hz). The main benefit of axial symmetry is that proven balancing techniques and hardware can be utilized to null all motion along the common axis. Low vibration translates to better sensor performance resulting in simpler, more direct mechanical mounting configurations, eliminating the need for convoluted, expensive, massive, long lead damping hardware.

Schaefer, B. R.; Bellis, L.; Ellis, M. J.; Conrad, T. [Raytheon Space and Airborne Systems, 2000 E. El Segundo Blvd., El Segundo, CA 90245 (United States)

2014-01-29T23:59:59.000Z

487

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

488

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

489

Compact Power Inc CPI | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin:EnergyWisconsin: Energy,(EC-LEDS)Columbus ElectricRefuseEnergyCompact Power Inc

490

Compact Absorption Chiller - Energy Innovation Portal  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New SubstationCleanCommunity Involvement and Making aCompact soft x-ray

491

Sandia National Laboratories: Compact Linear Fesnel Reflector  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0Energy AdvancedEnergyEnergyMappingCombustionBiofuels OnWindCompact

492

Application of Digital Image Correlation to reinforced concrete fracture  

E-Print Network [OSTI]

mechanics models to reinforced concrete structures where a stitching action prevents the crack face opening and controls the crack growth by increasing the energy demand for the crack advancement (Carpinteri and Massabo, 1997). Fracture mechanics is a... ., & Take, W. A. (2002). GeoPIV: Particle Image Velocimetry (PIV) software for use in geotechnical testing. Cambridge University Engineering Department Technical Report, CUED/D-Soil/TR322. ...

Fayyad, Tahreer M.; Lees, Janet M.

2014-06-27T23:59:59.000Z

493

Contaminated concrete: Occurrence and emerging technologies for DOE decontamination  

SciTech Connect (OSTI)

The goals of the Facility Deactivation, Decommissioning, and Material Disposition Focus Area, sponsored by the US Department of Energy (DOE) Office of Technology Development, are to select, demonstrate, test, and evaluate an integrated set of technologies tailored to provide a complete solution to specific problems posed by deactivation, decontamination, and decommissioning, (D&D). In response to these goals, technical task plan (TTP) OR152002, entitled Accelerated Testing of Concrete Decontamination Methods, was submitted by Oak Ridge National Laboratory. This report describes the results from the initial project tasks, which focused on the nature and extent of contaminated concrete, emerging candidate technologies, and matching of emerging technologies to concrete problems. Existing information was used to describe the nature and extent of contamination (technology logic diagrams, data bases, and the open literature). To supplement this information, personnel at various DOE sites were interviewed, providing a broad perspective of concrete contamination. Because characterization is in the initial stage at many sites, complete information is not available. Assimilation of available information into one location is helpful in identifying potential areas of concern in the future. The most frequently occurring radiological contaminants within the DOE complex are {sup 137}Cs, {sup 238}U (and it daughters), and {sup 60}Co, followed closely by {sup 90}Sr and tritium, which account for {minus}30% of the total occurrence. Twenty-four percent of the contaminants were listed as unknown, indicating a lack of characterization information, and 24% were listed as other contaminants (over 100 isotopes) with less than 1% occurrence per isotope.

Dickerson, K.S.; Wilson-Nichols, M.J. [Oak Ridge National Lab., Grand Junction, CO (United States); Morris, M.I. [Oak Ridge National Lab., TN (United States)

1995-08-01T23:59:59.000Z

494

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

495

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

496

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

497

Evaluation of a stack: A concrete chimney with brick liner  

SciTech Connect (OSTI)

A 200 ft. tall stack, consisting of a concrete chimney with an independent acid proof brick liner built in the 1950`s, serving the Separations facility at the Savannah River Site (SRS), was evaluated for the performance category 3 (PC3) level of Natural Phenomena Hazards (NPH) effects. The inelastic energy absorption capacity of the concrete chimney was considered in the evaluation of the earthquake resistance, in particular, to compute the F{sub {mu}} factor. The calculated value of F{sub {mu}} exceeded 3.0, while the seismic demand for the PC3 level, using an F{sub {mu}} value of 1.5, was found to be less than the capacity of the concrete chimney. The capacity formulation of ACI 307 was modified to incorporate the effect of an after design opening on the tension side. There are considerable uncertainties in determining the earthquake resistance of the independent brick liner. The critical liner section, located at the bottom of the breeching opening, does not meet the current recommendations. A discussion is provided for the possible acceptable values for the ``Moment Reduction Factor``, R{sub w} or F{sub {mu}} for the liner. Comments are provided on the comparison of stack demands using response spectra (RS) versus time history (TH) analysis, with and without soil structure interaction (SSI) effects.

Joshi, J.R.; Amin, J.A. [Westinghouse Savannah River Co., Aiken, SC (United States); Porthouse, R.A. [Chimney Consultants, West Lebanon, NH (United States)

1995-12-31T23:59:59.000Z

498

ROSAT Observations of Compact Groups of Galaxies  

E-Print Network [OSTI]

A search for X-ray emission from compact groups revealed detection from 8 out of the 12 HCG images extracted from the ROSAT public archive. For two of them the X-ray emission originates from galaxies in the group. On the contrary, three groups show an extended emission clearly caused by hot intracluster gas. A Raymond-Smith hot plasma model provides an excellent fit to the X-ray spectra. The estimated temperatures are distributed in a quite narrow range (from 0.73 to 0.92 keV) and are consistent, within the errors, with 0.9 keV. The luminosity ranging from 0.75 to $5.1\\cdot10^{42}$erg s$^{-1}$. The most relevant result is the low metal abundance surely detected in two of them and likely in a third that characterizes the hot gas cloud responsible for the X-ray emission. The data concerning the remaining 3 detected compact groups are not sufficient to discriminate with certainty between diffuse and/or point-like X-ray emission. However the results of the spectral analysis point to the presence of a hot gas again with low metal abundance.

P. Saracco; P. Ciliegi

1994-12-15T23:59:59.000Z

499

Strange Quark Matter and Compact Stars  

E-Print Network [OSTI]

Astrophysicists distinguish between three different types of compact stars. These are white dwarfs, neutron stars, and black holes. The former contain matter in one of the densest forms found in the Universe which, together with the unprecedented progress in observational astronomy, make such stars superb astrophysical laboratories for a broad range of most striking physical phenomena. These range from nuclear processes on the stellar surface to processes in electron degenerate matter at subnuclear densities to boson condensates and the existence of new states of baryonic matter--like color superconducting quark matter--at supernuclear densities. More than that, according to the strange matter hypothesis strange quark matter could be more stable than nuclear matter, in which case neutron stars should be largely composed of pure quark matter possibly enveloped in thin nuclear crusts. Another remarkable implication of the hypothesis is the possible existence of a new class of white dwarfs. This article aims at giving an overview of all these striking physical possibilities, with an emphasis on the astrophysical phenomenology of strange quark matter. Possible observational signatures associated with the theoretically proposed states of matter inside compact stars are discussed as well. They will provide most valuable information about the phase diagram of superdense nuclear matter at high baryon number density but low temperature, which is not accessible to relativistic heavy ion collision experiments.

Fridolin Weber

2004-09-27T23:59:59.000Z

500

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