Sample records for analyses cement bond

  1. Phosphate-bonded calcium aluminate cements

    DOE Patents [OSTI]

    Sugama, Toshifumi (Mastic Beach, NY)

    1993-01-01T23:59:59.000Z

    A method is described for making a rapid-setting phosphate-bonded cementitious material. A powdered aluminous cement is mixed with an aqueous solution of ammonium phosphate. The mixture is allowed to set to form an amorphous cementitious material which also may be hydrothermally treated at a temperature of from about 120.degree. C. to about 300.degree. C. to form a crystal-containing phosphate-bonded material. Also described are the cementitious products of this method and the cement composition which includes aluminous cement and ammonium polyphosphate.

  2. Phosphate-bonded calcium aluminate cements

    DOE Patents [OSTI]

    Sugama, T.

    1993-09-21T23:59:59.000Z

    A method is described for making a rapid-setting phosphate-bonded cementitious material. A powdered aluminous cement is mixed with an aqueous solution of ammonium phosphate. The mixture is allowed to set to form an amorphous cementitious material which also may be hydrothermally treated at a temperature of from about 120 C to about 300 C to form a crystal-containing phosphate-bonded material. Also described are the cementitious products of this method and the cement composition which includes aluminous cement and ammonium polyphosphate. 10 figures.

  3. Technical assessment of three layered cement-bonded boards produced from wastepaper and sawdust

    SciTech Connect (OSTI)

    Fuwape, Joseph Adeola [Department of Forestry and Wood Tech, Federal University of Technology, PMB 704 Akure (Nigeria); Fabiyi, James Sunday [Department of Forest Products, University of Idaho, Moscow, ID 83844-1132 (United States)], E-mail: jamesreb2004@yahoo.com; Osuntuyi, Edward Olusola [Department of Wood Units, School of Vocational Studies, College of Education, Ikere Ekiti (Nigeria)

    2007-07-01T23:59:59.000Z

    The technical properties of three layered cement-bonded boards (CBBs) made from wastepaper and sawdust were investigated. The CBBs were produced at three density levels of 1000, 1200 and 1300 kg/m{sup 3} and at four cement/particle ratios of 2.0:1, 2.5:1, 3.0:1 and 3.5:1 on a weight to weight basis. The technical properties evaluated were modulus of rupture (MOR), modulus of elasticity (MOE), water absorption (WA) and thickness swelling (TS). The MOR values ranged from 4.85 to 11.69 MPa and MOE values ranged from 2.80 to 5.57 GPa. The mean values of WA and TS after 24 h of water soaking of the CBBs ranged from 18.18% to 40.49% and 3.55% to 12.13%, respectively. MOR and MOE of the CBBs increased with increase in board density, but MOR decreased with the increase in cement/particle ratio. On the other hand, WA and TS decreased with increase in board density and cement/particle ratio. CBBs produced from wastepaper and sawdust at cement/particle ratios of 3.0:1 and 3.5:1 are suitable for building construction such as paneling, ceiling and partitioning.

  4. SENSITIVITY OF THE BOND STRENGTH TO THE STRUCTURE OF THE INTERFACE BETWEEN REINFORCEMENT AND CEMENT, AND THE

    E-Print Network [OSTI]

    Chung, Deborah D.L.

    Ashland Petroleum Co. (Ashland, KY). Cement paste made from Portland cement (Type I) from Lafarge Corp

  5. Determination of thermal and cementation histories from [sup 40]Ar/[sup 39]Ar and ion microprobe stable isotope analyses: A San Joaquin Basin example

    SciTech Connect (OSTI)

    Mahon, K.I.; Harrison, T.M.; Grove, M.; Lovera, O.M. (UCLA, Los Angeles, CA (United States))

    1996-01-01T23:59:59.000Z

    Knowledge of the temperature and cementation histories of sedimentary basins is key to appraisal of their liquid hydrocarbon potential. Understanding the thermal history permits assessment of whether source rocks have experienced conditions appropriate for petroleum formation. The mobility of hydrocarbons and their storage capacity in sandstone reservoirs are directly related to porosity changes during diagenesis. Recent advances in [sup 40]Ar/[sup 39]Ar dating (stripping of Cl-correlated Ar[sub xs] Multi-Diffusion Domain model) and development of ion micro-probe techniques for precise ([+-]0.6[per thousand]) [mu]m-scale oxygen isotopic analysis provide a basis to quantitatively determine thermal and cementation histories. Arkosic sandstones of the Stevens turbidities, San Joaquin basin, are cemented by carbonates with minor amounts of clay and quartz. Detrital K-spars from depths of 4.12 (A4) and 6.61 km (Al) in the Stevens zone at Elk Hills yield thermal histories via the MDD model. These results indicate a broadly linear temperature rise of 9[+-]3[degrees]C/Ma over the past 10 Ma and predict current peak temperatures that are within error ([+-]25[degrees]C) of the measured values of 200[degrees] (Al) and 150[degrees]C (A4). Previous bulk isotopic analyses of cements from Stevens sands at North Coles Levee indicate that diagenetic pore fluids were modified by the introduction of hydrocarbons and CO[sub 2] from maturing source horizons. In situ O isotopic analyses of 10 [mu]m spots in these cements confirms this heterogeneity. A model cementation history can then be calculated by linking the oxygen isotopic composition of the cements (and temperature-dependent fractionation factor) with the thermal history independently established from thermochronometry.

  6. Determination of thermal and cementation histories from {sup 40}Ar/{sup 39}Ar and ion microprobe stable isotope analyses: A San Joaquin Basin example

    SciTech Connect (OSTI)

    Mahon, K.I.; Harrison, T.M.; Grove, M.; Lovera, O.M. [UCLA, Los Angeles, CA (United States)

    1996-12-31T23:59:59.000Z

    Knowledge of the temperature and cementation histories of sedimentary basins is key to appraisal of their liquid hydrocarbon potential. Understanding the thermal history permits assessment of whether source rocks have experienced conditions appropriate for petroleum formation. The mobility of hydrocarbons and their storage capacity in sandstone reservoirs are directly related to porosity changes during diagenesis. Recent advances in {sup 40}Ar/{sup 39}Ar dating (stripping of Cl-correlated Ar{sub xs} Multi-Diffusion Domain model) and development of ion micro-probe techniques for precise ({+-}0.6{per_thousand}) {mu}m-scale oxygen isotopic analysis provide a basis to quantitatively determine thermal and cementation histories. Arkosic sandstones of the Stevens turbidities, San Joaquin basin, are cemented by carbonates with minor amounts of clay and quartz. Detrital K-spars from depths of 4.12 (A4) and 6.61 km (Al) in the Stevens zone at Elk Hills yield thermal histories via the MDD model. These results indicate a broadly linear temperature rise of 9{+-}3{degrees}C/Ma over the past 10 Ma and predict current peak temperatures that are within error ({+-}25{degrees}C) of the measured values of 200{degrees} (Al) and 150{degrees}C (A4). Previous bulk isotopic analyses of cements from Stevens sands at North Coles Levee indicate that diagenetic pore fluids were modified by the introduction of hydrocarbons and CO{sub 2} from maturing source horizons. In situ O isotopic analyses of 10 {mu}m spots in these cements confirms this heterogeneity. A model cementation history can then be calculated by linking the oxygen isotopic composition of the cements (and temperature-dependent fractionation factor) with the thermal history independently established from thermochronometry.

  7. Simultaneous assessment of phase chemistry, phase abundance and bulk chemistry with statistical electron probe micro-analyses: Application to cement clinkers

    SciTech Connect (OSTI)

    Wilson, William; Krakowiak, Konrad J.; Ulm, Franz-Josef, E-mail: ulm@mit.edu

    2014-01-15T23:59:59.000Z

    According to recent developments in cement clinker engineering, the optimization of chemical substitutions in the main clinker phases offers a promising approach to improve both reactivity and grindability of clinkers. Thus, monitoring the chemistry of the phases may become part of the quality control at the cement plants, along with the usual measurements of the abundance of the mineralogical phases (quantitative X-ray diffraction) and the bulk chemistry (X-ray fluorescence). This paper presents a new method to assess these three complementary quantities with a single experiment. The method is based on electron microprobe spot analyses, performed over a grid located on a representative surface of the sample and interpreted with advanced statistical tools. This paper describes the method and the experimental program performed on industrial clinkers to establish the accuracy in comparison to conventional methods. -- Highlights: •A new method of clinker characterization •Combination of electron probe technique with cluster analysis •Simultaneous assessment of phase abundance, composition and bulk chemistry •Experimental validation performed on industrial clinkers.

  8. Bond Strength Measurements from an Australian Standard Bond Wrench in Comparison to the Unbalanced ASTM C 1072 Bond Wrench to the Balanced and Unbalanced Wrenches

    E-Print Network [OSTI]

    Suresh, Sri Vishnu Chaitanya Guptha

    2014-08-14T23:59:59.000Z

    Bond wrenches. The Australian wrench values were significantly higher than the American bond wrenches for similar types of samples. Hence it was recommended that the tests be carried out by replacing the cement with Portland cement. This experimental...

  9. Development of an Improved Cement for Geothermal Wells

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

    throughout cement placement without significant changes in viscosity. * Water absorption capacity without retaining free water. * Good bonding to casing and formation. *...

  10. Primary cementing across massive lost circulation zones

    SciTech Connect (OSTI)

    Turki, W.H.; Mackay, A.S.

    1983-03-01T23:59:59.000Z

    As a result of severe lost circulation problems in some wells in the Ghawar and Abqaiq Fields, Aramco has been unable to cover the Umm Er-Radhuma (Paleocene) and Wasia (Cretaceous) aquifers with cement. This has necessitated setting an extended liner opposite the Wasia aquifer, to ensure that there are two casing strings and a cement sheath across the aquifer, resulting in increased casing cost and reduced well productivity. This paper describes the results of field trial tests performed, along with conclusions and recommendations aimed at solving this problem. Field methods employed include light weight extended cements, ultra-light cement slurries weighing as little as 55 lbm/ft/sup 3/ (pcf), using ceramic hollow spheres, glass bubbles and foam, plus hydrostatic cementing, and mechanical devices. Finally, methods of job evaluation are discussed. These include temperature surveys, bond logs, radioactive tracers, and a new cement volume log.

  11. Zinc electrode with cement additive

    DOE Patents [OSTI]

    Charkey, Allen (Brookfield, CT)

    1982-06-01T23:59:59.000Z

    A zinc electrode having a cement additive, preferably, Portland Cement, distributed in the zinc active material.

  12. CEMENT RELATED RESEARCH HYDROGEOCHEMISTRY GROUP

    E-Print Network [OSTI]

    Politècnica de Catalunya, Universitat

    CEMENT RELATED RESEARCH HYDROGEOCHEMISTRY GROUP Josep M. Soler Jordi Cama Carles Ayora Ana Trapote.soler@idaea.csic.es #12;NOMECLATURE cement + water = hardened cement paste cement + water + sand = mortar cement + waterC) clinker + gypsum portland cement PORTLAND CEMENT #12;GTS-HPF Core Infiltration Experiment Experimental

  13. Aberration-corrected transmission electron microscopy analyses of GaAs/Si interfaces in wafer-bonded multi-junction solar cells

    E-Print Network [OSTI]

    Dunin-Borkowski, Rafal E.

    -bonded multi-junction solar cells Dietrich Häussler a , Lothar Houben b , Stephanie Essig c , Mert Kurttepeli online 20 July 2013 Keywords: Multi-junction solar cell Wafer bonding Interfaces Aberration corrected and composition fluctuations near interfaces in wafer-bonded multi-junction solar cells. Multi-junction solar

  14. Cement Bond Log | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, click here.Telluric Survey asWest, New Jersey: EnergyGeothermal

  15. Fracture model for cemented aggregates

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Zubelewicz, Aleksander; Thompson, Darla G.; Ostoja-Starzewski, Martin; Ionita, Axinte; Shunk, Devin; Lewis, Matthew W.; Lawson, Joe C.; Kale, Sohan; Koric, Seid

    2013-01-01T23:59:59.000Z

    A mechanisms-based fracture model applicable to a broad class of cemented aggregates and, among them, plastic-bonded explosive (PBX) composites, is presented. The model is calibrated for PBX 9502 using the available experimental data under uniaxial compression and tension gathered at various strain rates and temperatures. We show that the model correctly captures inelastic stress-strain responses prior to the load peak and it predicts the post-critical macro-fracture processes, which result from the growth and coalescence of micro-cracks. In our approach, the fracture zone is embedded into elastic matrix and effectively weakens the material's strength along the plane of the dominant fracture.

  16. Thermcoat Cement INSTRUCTION

    E-Print Network [OSTI]

    Kleinfeld, David

    CO and COL Thermcoat Cement INSTRUCTION SHEET M0101/0801 OMEGA® Thermcoat CO and COL consists of a powder (CO) and a liquid (COL) which, upon proper mixing, will yield a strong, insoluble cement. It has, which means it generates heat. For this reason, the heat must be dissipated or the cement will set too

  17. HYDRAULIC CEMENT PREPARATION FROM LURGI SPENT SHALE

    E-Print Network [OSTI]

    Mehta, P.K.

    2013-01-01T23:59:59.000Z

    Investigations on hydraulic cement from spent oil shale,"April 16-18, 1980 HYDRAULIC CEMENT PREPARATION FROM LURGIpressi ve b strength, MPa this cement in moist environments.

  18. Climate VISION: Private Sector Initiatives: Cement: Resources...

    Office of Scientific and Technical Information (OSTI)

    The Cement Sustainability Initiative Coordinated by the World Business Council for Sustainable Development, the Cement Sustainability Initiative (CSI) helps the cement...

  19. Alternative Fuel for Portland Cement Processing

    SciTech Connect (OSTI)

    Anton K. Schindler; Steve R. Duke; Thomas E. Burch; Edward W. Davis; Ralph H. Zee; David I. Bransby; Carla Hopkins; Rutherford L. Thompson; Jingran Duan; Vignesh Venkatasubramanian; Stephen Giles.

    2012-06-30T23:59:59.000Z

    The production of cement involves a combination of numerous raw materials, strictly monitored system processes, and temperatures on the order of 1500 °C. Immense quantities of fuel are required for the production of cement. Traditionally, energy from fossil fuels was solely relied upon for the production of cement. The overarching project objective is to evaluate the use of alternative fuels to lessen the dependence on non-renewable resources to produce portland cement. The key objective of using alternative fuels is to continue to produce high-quality cement while decreasing the use of non-renewable fuels and minimizing the impact on the environment. Burn characteristics and thermodynamic parameters were evaluated with a laboratory burn simulator under conditions that mimic those in the preheater where the fuels are brought into a cement plant. A drop-tube furnace and visualization method were developed that show potential for evaluating time- and space-resolved temperature distributions for fuel solid particles and liquid droplets undergoing combustion in various combustion atmospheres. Downdraft gasification has been explored as a means to extract chemical energy from poultry litter while limiting the throughput of potentially deleterious components with regards to use in firing a cement kiln. Results have shown that the clinkering is temperature independent, at least within the controllable temperature range. Limestone also had only a slight effect on the fusion when used to coat the pellets. However, limestone addition did display some promise in regards to chlorine capture, as ash analyses showed chlorine concentrations of more than four times greater in the limestone infused ash as compared to raw poultry litter. A reliable and convenient sampling procedure was developed to estimate the combustion quality of broiler litter that is the best compromise between convenience and reliability by means of statistical analysis. Multi-day trial burns were conducted at a full-scale cement plant with alternative fuels to examine their compatibility with the cement production process. Construction and demolition waste, woodchips, and soybean seeds were used as alternative fuels at a full-scale cement production facility. These fuels were co-fired with coal and waste plastics. The alternative fuels used in this trial accounted for 5 to 16 % of the total energy consumed during these burns. The overall performance of the portland cement produced during the various trial burns performed for practical purposes very similar to the cement produced during the control burn. The cement plant was successful in implementing alternative fuels to produce a consistent, high-quality product that increased cement performance while reducing the environmental footprint of the plant. The utilization of construction and demolition waste, woodchips and soybean seeds proved to be viable replacements for traditional fuels. The future use of these fuels depends on local availability, associated costs, and compatibility with a facilityâ??s production process.

  20. Thermodynamics and cement science

    SciTech Connect (OSTI)

    Damidot, D., E-mail: damidot@ensm-douai.fr [Universite Lille Nord de France (France); EM Douai, LGCgE-MPE-GCE, Douai (France); Lothenbach, B. [Empa, Lab. Concrete and Construction Chemistry, Duebendorf (Switzerland); Herfort, D. [Cementir Holding (Denmark); Glasser, F.P. [Chemistry Department, University of Aberdeen, Aberdeen (United Kingdom)

    2011-07-15T23:59:59.000Z

    Thermodynamics applied to cement science has proved to be very valuable. One of the most striking findings has been the extent to which the hydrate phases, with one conspicuous exception, achieve equilibrium. The important exception is the persistence of amorphous C-S-H which is metastable with respect to crystalline calcium silicate hydrates. Nevertheless C-S-H can be included in the scope of calculations. As a consequence, from comparison of calculation and experiment, it appears that kinetics is not necessarily an insuperable barrier to engineering the phase composition of a hydrated Portland cement. Also the sensitivity of the mineralogy of the AFm and AFt phase compositions to the presence of calcite and to temperature has been reported. This knowledge gives a powerful incentive to develop links between the mineralogy and engineering properties of hydrated cement paste and, of course, anticipates improvements in its performance leading to decreasing the environmental impacts of cement production.

  1. A case study of ultralightweight cementing practices in the Northeastern United States

    SciTech Connect (OSTI)

    Edmondson, T.D.; Benge, O.G.

    1983-11-01T23:59:59.000Z

    Wells in the northeastern United States are generally drilled to a depth of from 3,000 to 6,000 ft. They are usually air drilled through several incompetent formations among which are the Marcellus and Coffee shales. Completions in this area are hampered by very low fracture gradients of 0.4 to 0.6 psi/ft, with most of the formations containing a large number of natural fractures. During cementing, pressures in excess of 1,100-psi hydrostatic can result in breakdown of the formation leading to incomplete fillup on the cement job. This paper will discuss the existing completion practices in this area, which include the use of multistage cementing, and the incorporation of cementing baskets and other downhole tools. The current cement systems in use and the problems encountered in using them will also be discussed. Several case histories of new cementing techniques, using ultralightweight foam-cementing systems, will be presented along with the job design used on these wells. Bond logging of the foam-cemented wells creates an array of special problems for the logging companies, due to the ultra-low densities and the high porosities of these special cementing systems. Newly developed techniques for logging these wells will be discussed, along with the bond logs from the case histories.

  2. Quantifying the Micromechanical Effects of Variable Cement in Granular Porous Media

    SciTech Connect (OSTI)

    Goodwin, Laurel B.; Boutt David F.

    2010-02-18T23:59:59.000Z

    The mechanical and hydrologic behavior of clastic rocks and sediments is fundamentally controlled by variables such as grain size and shape, sorting, grain and cement mineralogy, porosity, and %cement - parameters that are not used directly in field-scale models of coupled flow and deformation. To improve our understanding of the relationship between these micromechanical properties and bulk behavior we focused on (1) relating detailed, quantitative characterization of the grain-pore systems to both hydrologic and mechanical properties of a suite of variably quartz-cemented quartz arenite samples and (2) the use of a combination of discrete element method (DEM) and poroelastic models parameterized by data from the natural samples to isolate and compare the influence of changes in the mechanical and hydrologic properties of granular porous media due to changes in degree of cementation. Quartz overgrowths, the most common form of authigenic cements in sandstones, are responsible for significant porosity and permeability reduction. The distribution of quartz overgrowths is controlled by available pore space and the crystallographic orientations of individual quartz grains. Study of the St. Peter Sandstone allowed evaluation of the relative effects of quartz cementation and compaction on final grain and pore morphology, showing that progressive quartz cementation modifies the grain framework in consistent, predictable ways. Detailed microstructural characterization and multiple regression analyses show that with progressive diagenesis, the number and length of grain contacts increases as the number of pores increases, the number of large, well-connected pores decreases, and pores become rounder. These changes cause a decrease in pore size variability that leads to a decrease in bulk permeability and both stiffening and strengthening of the grain framework. The consistent nature of these changes allows us to predict variations in hydrologic and mechanical properties with progressive diagenesis, and explore the impact of these changes on aquifer behavior. Several examples of this predictive capability are offered. In one application, data from natural sandstones are used to calibrate the proportionality constant of the Kozeny-Carman relationship, improving the ability to predict permeability in quartz-cemented quartz arenites. In another, the bond-to-grain ratio (BGR) is used to parameterize a discrete element model with data acquired from sandstone samples. The DEM results provide input to poroelastic models used to explore the hydrologic, mechanical, and coupled hydrologic and mechanical response of the sandstone to pumping stresses. This modeling exercise shows that at the macro-scale, changes in mechanical and hydrologic properties directly influence the magnitude and area of aquifer deformation. The significant difference in sensitivity of the system to the mechanical properties alone versus its sensitivity to coupled mechanical and hydrologic properties demonstrates the importance of including hydrologic properties that are adjusted for changes in cementation in fluid storage and deformation studies. The large magnitude of radial deformation compared to vertical deformation in these models emphasizes the importance of considering three dimensional deformation in fluid flow and deformation studies.

  3. Carbon nanotube and nanofiber reinforcement for improving the flexural strength and fracture toughness of portland cement paste 

    E-Print Network [OSTI]

    Tyson, Bryan Michael

    2012-07-16T23:59:59.000Z

    used for other materials (like polymers) will be used in achieving uniform dispersion of nano-filaments in the cement paste matrix and strong nano-filaments/cement bonding. Small-scale specimens will be prepared for mechanical testing in order...

  4. New cement additives that eliminate cement body permeability

    SciTech Connect (OSTI)

    Talabani, S.; Hareland, G. [New Mexico Inst. of Mining and Technology, Socorro, NM (United States)

    1995-10-01T23:59:59.000Z

    An experimental investigation was carried out replacing some currently used cement additives with three new additives. The experiments performed monitored the cement slurry pressure during the setting of the cement. During the setting period of the cement, two time cycles of cement expansion and contraction are observed. This is due to the individual contribution of each component in the cement mixture. To obtain the optimum tightness of the cement, final contraction in the cycle is crucial for blockage of gas migration. In these studies optimum concentrations of the additives were obtained experimentally, where the cyclic pressure behavior of the cement was optimized and the permeability reduced for the best final cement results. The parameters investigated in this study were; change in the applied pressure on the slurry with time, the compressive strength and permeability of the set cement. The major causes of the early microfractures are the in-complete cement-water reaction, low compressive strength of the set cement, and the sudden change in the hydrostatic pressure as the cement changes its phase from liquid to a solid state. The fluid loss and free water content were measured and controlled for each sample. The results of this study is that proper amounts of X-C polymer, Anchorage clay, Ironite Sponge, and Synthetic Rubber can be used to optimize the compressive strength and eliminate both micro-fracture and micro-annulus. There are certain limits to the amount and type of Synthetic Rubber powder which cement will set and the micro-fractures are eliminated. This experimental approach can be used to eliminate gas migration through a cement design that is environmentally safe, inexpensive, and uses recyclable materials.

  5. Cement-Lock for Decontaminating

    E-Print Network [OSTI]

    Brookhaven National Laboratory

    Cement-Lock® Technology for Decontaminating Dredged Estuarine Sediments Topical Report N O L O G Y I N S T I T U T E Cement-Lock Demo Plant Prepared by: Michael C. Mensinger GAS conducted as part of the overall program "Cement-Lock®1 Technology for Decontaminating Dredged Estuarine

  6. Communication Cement-based thermocouples

    E-Print Network [OSTI]

    Chung, Deborah D.L.

    Communication Cement-based thermocouples Sihai Wen, D.D.L. Chung* Composite Materials Research Received 31 May 2000; accepted 4 August 2000 Abstract A cement-based thermocouple in the form of a junction between dissimilar cement pastes and exhibiting thermocouple sensitivity 70 7 mV/°C is provided

  7. High temperature lightweight foamed cements

    DOE Patents [OSTI]

    Sugama, Toshifumi (Mastic Beach, NY)

    1989-01-01T23:59:59.000Z

    Cement slurries are disclosed which are suitable for use in geothermal wells since they can withstand high temperatures and high pressures. The formulation consists of cement, silica flour, water, a retarder, a foaming agent, a foam stabilizer, and a reinforcing agent. A process for producing these cements is also disclosed.

  8. High temperature lightweight foamed cements

    DOE Patents [OSTI]

    Sugama, Toshifumi.

    1989-10-03T23:59:59.000Z

    Cement slurries are disclosed which are suitable for use in geothermal wells since they can withstand high temperatures and high pressures. The formulation consists of cement, silica flour, water, a retarder, a foaming agent, a foam stabilizer, and a reinforcing agent. A process for producing these cements is also disclosed. 3 figs.

  9. Investigations into the Nature of Halogen Bonding Including Symmetry...

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

    into the Nature of Halogen Bonding Including Symmetry Adapted Perturbation Theory Analyses. Investigations into the Nature of Halogen Bonding Including Symmetry Adapted...

  10. Alex Benson Cement Plants

    E-Print Network [OSTI]

    Toohey, Darin W.

    of generating electricity by coal. o From Kiln Combustion CO2 ­ 2nd largest CO2 emitter behind electricity cement company 156,000 kilowatt-hours of electricity per year o "Cemex to pay $2M for pollution controls to produce Kiln Mix -> sent to kilns along with coal ( heating is facilitated by the coal ). Kiln Mix

  11. Thermal Shock-resistant Cement

    SciTech Connect (OSTI)

    Sugama T.; Pyatina, T.; Gill, S.

    2012-02-01T23:59:59.000Z

    We studied the effectiveness of sodium silicate-activated Class F fly ash in improving the thermal shock resistance and in extending the onset of hydration of Secar #80 refractory cement. When the dry mix cement, consisting of Secar #80, Class F fly ash, and sodium silicate, came in contact with water, NaOH derived from the dissolution of sodium silicate preferentially reacted with Class F fly ash, rather than the #80, to dissociate silicate anions from Class F fly ash. Then, these dissociated silicate ions delayed significantly the hydration of #80 possessing a rapid setting behavior. We undertook a multiple heating -water cooling quenching-cycle test to evaluate the cement’s resistance to thermal shock. In one cycle, we heated the 200 and #61616;C-autoclaved cement at 500 and #61616;C for 24 hours, and then the heated cement was rapidly immersed in water at 25 and #61616;C. This cycle was repeated five times. The phase composition of the autoclaved #80/Class F fly ash blend cements comprised four crystalline hydration products, boehmite, katoite, hydrogrossular, and hydroxysodalite, responsible for strengthening cement. After a test of 5-cycle heat-water quenching, we observed three crystalline phase-transformations in this autoclaved cement: boehmite and #61614; and #61543;-Al2O3, katoite and #61614; calcite, and hydroxysodalite and #61614; carbonated sodalite. Among those, the hydroxysodalite and #61614; carbonated sodalite transformation not only played a pivotal role in densifying the cementitious structure and in sustaining the original compressive strength developed after autoclaving, but also offered an improved resistance of the #80 cement to thermal shock. In contrast, autoclaved Class G well cement with and without Class F fly ash and quartz flour failed this cycle test, generating multiple cracks in the cement. The major reason for such impairment was the hydration of lime derived from the dehydroxylation of portlandite formed in the autoclaved cement, causing its volume to expand.

  12. Novel Chemically-Bonded Phosphate Ceramic Borehole Sealants (Ceramicretes) for Arctic Environments

    SciTech Connect (OSTI)

    Shirish Patil; Godwin A. Chukwu; Gang Chen; Santanu Khataniar

    2008-12-31T23:59:59.000Z

    Novel chemically bonded phosphate ceramic borehole sealant, i.e. Ceramicrete, has many advantages over conventionally used permafrost cement at Alaska North Slope (ANS). However, in normal field practices when Ceramicrete is mixed with water in blenders, it has a chance of being contaminated with leftover Portland cement. In order to identify the effect of Portland cement contamination, recent tests have been conducted at BJ services in Tomball, TX as well as at the University of Alaska Fairbanks with Ceramicrete formulations proposed by the Argonne National Laboratory. The tests conducted at BJ Services with proposed Ceramicrete formulations and Portland cement contamination have shown significant drawbacks which has caused these formulations to be rejected. However, the newly developed Ceramicrete formulation at the University of Alaska Fairbanks has shown positive results with Portland cement contamination as well as without Portland cement contamination for its effective use in oil well cementing operations at ANS.

  13. Role of interatomic bonding in the mechanical anisotropy and interlayer cohesion of CSH crystals

    SciTech Connect (OSTI)

    Dharmawardhana, C.C. [Department of Physics and Astronomy, University of Missouri—Kansas City, Kansas City, MO 64110 (United States)] [Department of Physics and Astronomy, University of Missouri—Kansas City, Kansas City, MO 64110 (United States); Misra, A. [Department of Civil, Environmental, and Architectural Engineering, University of Kansas, Lawrence, KS 66045 (United States)] [Department of Civil, Environmental, and Architectural Engineering, University of Kansas, Lawrence, KS 66045 (United States); Aryal, S.; Rulis, P. [Department of Physics and Astronomy, University of Missouri—Kansas City, Kansas City, MO 64110 (United States)] [Department of Physics and Astronomy, University of Missouri—Kansas City, Kansas City, MO 64110 (United States); Ching, W.Y., E-mail: ccdxz8@mail.umkc.edu [Department of Physics and Astronomy, University of Missouri—Kansas City, Kansas City, MO 64110 (United States)

    2013-10-15T23:59:59.000Z

    Atomic scale properties of calcium silicate hydrate (CSH), the main binding phase of hardened Portland cement, are not well understood. Over a century of intense research has identified almost 50 different crystalline CSH minerals which are mainly categorized by their Ca/Si ratio. The electronic structure and interatomic bonding in four major CSH crystalline phases with structures close to those found in hardened cement are investigated via ab initio methods. Our result reveals the critical role of hydrogen bonding and importance of specifying precise locations for water molecules. Quantitative analysis of contributions from different bond types to the overall cohesion shows that while the Si-O covalent bonds dominate, the hydrogen bonding and Ca-O bonding are also very significant. Calculated results reveal the correlation between bond topology and interlayer cohesion. The overall bond order density (BOD) is found to be a more critical measure than the Ca/Si ratio in classifying different CSH crystals.

  14. Transport in Cement:Transport in Cement: Relating Permeability and PoreRelating Permeability and Pore

    E-Print Network [OSTI]

    Petta, Jason

    Transport in Cement:Transport in Cement: Relating Permeability and PoreRelating Permeability, 2004 #12;OutlineOutline Cement Manufacturing and StructureCement Manufacturing and Structure ofofCalcinated in rotaryin rotary kiln at 1500 C for 30kiln at 1500 C for 30-- 40 minutes40 minutes Produces Cement

  15. Comparative analysis of the life cycle impact assessment of available cement inventories in the EU

    SciTech Connect (OSTI)

    Josa, Alejandro [Technical University of Catalonia (UPC), School of Civil Engineering (ETSECCPB), C/Jordi Girona 1-3 Modul D2/C1, Barcelona 08034 (Spain)]. E-mail: alejandro.josa@upc.edu; Aguado, Antonio [Technical University of Catalonia (UPC), School of Civil Engineering (ETSECCPB), C/Jordi Girona 1-3 Modul D2/C1, Barcelona 08034 (Spain); Cardim, Arnaldo [Civil Engineering Department, Polytechnic School of Penambuco University, Rua Benfica, 455-Madalena, CEP 50.750-410 (Brazil); Byars, Ewan [Centre for Cement and Concrete, Department of Civil and Structural Engineering, University of Sheffield, Sir Frederick Mappin Building, Mappin Street, Sheffield S1 3JD (United Kingdom)

    2007-05-15T23:59:59.000Z

    Life cycle impact assessment (LCIA) is one of basic steps in life cycle assessment methodology (LCA). This paper presents a comparative study of the LCIA of different life cycle inventories (LCI) for EU cements. The analysis unit used is the manufacture of 1 kg of cement, from 'cradle to gate'. The impact categories considered are those resulting from the manufacture of cement and include greenhouse effects, acidification, eutrophication and summer and winter smog, amongst others. The results of the study highlighted some inconsistencies in existing inventories. As for the LCIA, the main environmental interventions related to cement manufacture were classified and characterised and their effect on different impact categories analysed. Differences observed in evaluation of the impact of cement type were essentially related to their clinker content.

  16. Guidebook for Using the Tool BEST Cement: Benchmarking and Energy Savings Tool for the Cement Industry

    E-Print Network [OSTI]

    Galitsky, Christina

    2009-01-01T23:59:59.000Z

    eds. ) 2004. Innovations in Portland Cement Manufacturing.Portland Cement Association. Venkateswaran, S.R. and H.E.Lowitt. 1988. The U.S. Cement Industry, An Energy

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

    E-Print Network [OSTI]

    Harms, Kyle E.

    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

  18. Increasing Energy Efficiency and Reducing Emissions from China's Cement Kilns: Audit Report of Two Cement Plants in Shandong Province, China

    E-Print Network [OSTI]

    Price, Lynn

    2013-01-01T23:59:59.000Z

    and a vertical shaft kiln at another cement manufacturingrotary kiln or vertical shaft kiln in a cement plant. Baseda vertical shaft kiln (VSK) at another cement manufacturing

  19. Guidebook for Using the Tool BEST Cement: Benchmarking and Energy Savings Tool for the Cement Industry

    E-Print Network [OSTI]

    Galitsky, Christina

    2009-01-01T23:59:59.000Z

    the small cement plants, earthen vertical kiln (and hollowcement plant in North China utilizing vertical shaft kilnsCement Industry Technical Conference: 75- Replacing Vertical Shaft Kilns

  20. Micromechanics analysis of thermal expansion and thermal pressurization of a hardened cement paste

    E-Print Network [OSTI]

    Ghabezloo, Siavash

    2011-01-01T23:59:59.000Z

    The results of a macro-scale experimental study of the effect of heating on a fluid-saturated hardened cement paste are analysed using a multi-scale homogenization model. The analysis of the experimental results revealed that the thermal expansion coefficient of the cement paste pore fluid is anomalously higher than the one of pure bulk water. The micromechanics model is calibrated using the results of drained and undrained heating tests and permits the extrapolation of the experimentally evaluated thermal expansion and thermal pressurization parameters to cement pastes with different water-to-cement ratios. It permits also to calculate the pore volume thermal expansion coefficient f a which is difficult to evaluate experimentally. The anomalous pore fluid thermal expansion is also analysed using the micromechanics model.

  1. Experimental study of potential wellbore cement carbonation by various phases of carbon dioxide during geologic carbon sequestration

    SciTech Connect (OSTI)

    Jung, Hun Bok; Um, Wooyong

    2013-08-16T23:59:59.000Z

    Hydrated Portland cement was reacted with carbon dioxide (CO2) in supercritical, gaseous, and aqueous phases to understand the potential cement alteration processes along the length of a wellbore, extending from deep CO2 storage reservoir to the shallow subsurface during geologic carbon sequestration. The 3-D X-ray microtomography (XMT) images displayed that the cement alteration was significantly more extensive by CO2-saturated synthetic groundwater than dry or wet supercritical CO2 at high P (10 MPa)-T (50°C) conditions. Scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS) analysis also exhibited a systematic Ca depletion and C enrichment in cement matrix exposed to CO2-saturated groundwater. Integrated XMT, XRD, and SEM-EDS analyses identified the formation of extensive carbonated zone filled with CaCO3(s), as well as the porous degradation front and the outermost silica-rich zone in cement after exposure to CO2-saturated groundwater. The cement alteration by CO2-saturated groundwater for 2-8 months overall decreased the porosity from 31% to 22% and the permeability by an order of magnitude. Cement alteration by dry or wet supercritical CO2 was slow and minor compared to CO2-saturated groundwater. A thin single carbonation zone was formed in cement after exposure to wet supercritical CO2 for 8 months or dry supercritical CO2 for 15 months. Extensive calcite coating was formed on the outside surface of a cement sample after exposure to wet gaseous CO2 for 1-3 months. The chemical-physical characterization of hydrated Portland cement after exposure to various phases of carbon dioxide indicates that the extent of cement carbonation can be significantly heterogeneous depending on CO2 phase present in the wellbore environment. Both experimental and geochemical modeling results suggest that wellbore cement exposure to supercritical, gaseous, and aqueous phases of CO2 during geologic carbon sequestration is unlikely to damage the wellbore integrity because cement alteration by all phases of CO2 is dominated by carbonation reaction. This is consistent with previous field studies of wellbore cement with extensive carbonation after exposure to CO2 for 3 decades. However, XMT imaging indicates that preferential cement alteration by supercritical CO2 or CO2-saturated groundwater can occur along the cement-steel or cement-rock interfaces. This highlights the importance of further investigation of cement degradation along the interfaces of wellbore materials to ensure permanent geologic carbon storage.

  2. Increasing Energy Efficiency and Reducing Emissions from China's Cement Kilns: Audit Report of Two Cement Plants in Shandong Province, China

    E-Print Network [OSTI]

    Price, Lynn

    2013-01-01T23:59:59.000Z

    http://www.wbcsd.ch/web/projects/cement/pop-report.pdfShui Ni 1 and Shui Ni 2 cement plants in Shangdong ProvinceReferences Ash Grove Cement, n.d. , “Cement Manufacturing

  3. Hydrogen Bonded Arrays: The Power of Multiple Hydrogen Bonds...

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

    Bonded Arrays: The Power of Multiple Hydrogen Bonds. Hydrogen Bonded Arrays: The Power of Multiple Hydrogen Bonds. Abstract: Hydrogen bond interactions in small covalent model...

  4. Investing in Bonds

    E-Print Network [OSTI]

    Johnson, Jason; Polk, Wade

    2002-08-12T23:59:59.000Z

    Bonds, which are issued by governments and corporations, can be an important part of one's investment portfolio. U.S. government bonds, municipal bonds, zero-coupon bonds and other types are described. Also learn strategies for coping with inflation...

  5. SCHEDULING CEMENT PLANTS WITH ENERGY CONSTRAINTS

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    SCHEDULING CEMENT PLANTS WITH ENERGY CONSTRAINTS Pedro M. Castro Ignacio E. Grossmann Iiro K Meeting 4 #12;5 ABB PROJECT #12;INTRODUCTION Cement producers currently under pressure to produce Contracts agreed between electricity supplier and cement plants (planning level) Energy cost [$/k

  6. Economic analysis of the European cement industry

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Economic analysis of the European cement industry Marcel Boyer1 and JeanPierre Ponssard2 December 2013. The methodology is applied to the European cement industry over the period 20042012 (Part I) and over the next and industry experts. Key words: return on assets, capital intensive industry, business cycle, European cement

  7. Undesired drying of concrete and cement paste

    E-Print Network [OSTI]

    Langendoen, Koen

    Undesired drying of concrete and cement paste is a nightmare for any construction engineer of the concrete or cement paste surface. Inspired by the art of molecular cooking a team of TU Delft scientists for instance sodium alginates. When sprayed on the surface of concrete or cement paste, a rapid chemical

  8. ADVANCED CEMENTS FOR GEOTHERMAL WELLS

    SciTech Connect (OSTI)

    SUGAMA,T.

    2007-01-01T23:59:59.000Z

    Using the conventional well cements consisting of the calcium silicate hydrates (CaO-SiO{sub 2}-H{sub 2}O system) and calcium aluminum silicate hydrates (CaO-Al{sub 2}O{sub 3}-SiO{sub 2}-H{sub 2}O system) for the integrity of geothermal wells, the serious concern confronting the cementing industries was their poor performance in mechanically supporting the metallic well casing pipes and in mitigating the pipe's corrosion in very harsh geothermal reservoirs. These difficulties are particularly acute in two geological regions: One is the deep hot downhole area ({approx} 1700 m depth at temperatures of {approx} 320 C) that contains hyper saline water with high concentrations of CO{sub 2} (> 40,000 ppm) in conjunction with {approx} 100 ppm H{sub 2}S at a mild acid of pH {approx} 5.0; the other is the upper well region between the well's surface and {approx} 1000 m depth at temperatures up to 200 C. The specific environment of the latter region is characterized by highly concentrated H{sub 2}SO{sub 4} (pH < 1.5) brine containing at least 5000 ppm CO{sub 2}. When these conventional cements are emplaced in these harsh environments, their major shortcoming is their susceptibility to reactions with hot CO{sub 2} and H{sub 2}SO4, thereby causing their deterioration brought about by CO{sub 2}-catalyzed carbonation and acid-initiated erosion. Such degradation not only reduced rapidly the strength of cements, lowering the mechanical support of casing pipes, but also increased the extent of permeability of the brine through the cement layer, promoting the rate of the pipe's corrosion. Severely carbonated and acid eroded cements often impaired the integrity of a well in less than one year; in the worst cases, casings have collapsed within three months, leading to the need for costly and time-consuming repairs or redrilling operations. These were the reasons why the geothermal well drilling and cementing industries were concerned about using conventional well cements, and further their deterioration was a major impediment in expediting the development of geothermal energy resources.

  9. High temperature synthetic cement retarder

    SciTech Connect (OSTI)

    Eoff, L.S.; Buster, D.

    1995-11-01T23:59:59.000Z

    A synthetic cement retarder which provides excellent retardation and compressive strength development has been synthesized. The response properties and temperature ranges of the synthetic retarder far exceed those of commonly used retarders such as lignosulfonates. The chemical nature of the new retarder is discussed and compared to another synthetic retarder.

  10. Process for cementing geothermal wells

    DOE Patents [OSTI]

    Eilers, Louis H. (Inola, OK)

    1985-01-01T23:59:59.000Z

    A pumpable slurry of coal-filled furfuryl alcohol, furfural, and/or a low molecular weight mono- or copolymer thereof containing, preferably, a catalytic amount of a soluble acid catalyst is used to cement a casing in a geothermal well.

  11. The effect of undrained heating on a fluid-saturated hardened cement paste

    E-Print Network [OSTI]

    Ghabezloo, Siavash; Saint-Marc, Jérémie

    2008-01-01T23:59:59.000Z

    The effect of undrained heating on volume change and induced pore pressure increase is an important point to properly understand the behaviour and evaluate the integrity of an oil well cement sheath submitted to rapid temperature changes. This thermal pressurization of the pore fluid is due to the discrepancy between the thermal expansion coefficients of the pore fluid and of the solid matrix. The equations governing the undrained thermo-hydro-mechanical response of a porous material are presented and the effect of undrained heating is studied experimentally for a saturated hardened cement paste. The measured value of the thermal pressurization coefficient is equal to 0.6MPa/'C. The drained and undrained thermal expansion coefficients of the hardened cement paste are also measured in the heating tests. The anomalous thermal behaviour of cement pore fluid is back analysed from the results of the undrained heating test.

  12. Determination of Diffusion Profiles in Altered Wellbore Cement Using X-ray Computed Tomography Methods

    SciTech Connect (OSTI)

    Mason, Harris E. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Walsh, Stuart D. C. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); DuFrane, Wyatt L. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Carroll, Susan A. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2014-06-17T23:59:59.000Z

    The development of accurate, predictive models for use in determining wellbore integrity requires detailed information about the chemical and mechanical changes occurring in hardened Portland cements. X-ray computed tomography (XRCT) provides a method that can nondestructively probe these changes in three dimensions. Here, we describe a method for extracting subvoxel mineralogical and chemical information from synchrotron XRCT images by combining advanced image segmentation with geochemical models of cement alteration. The method relies on determining “effective linear activity coefficients” (ELAC) for the white light source to generate calibration curves that relate the image grayscales to material composition. The resulting data set supports the modeling of cement alteration by CO2-rich brine with discrete increases in calcium concentration at reaction boundaries. The results of these XRCT analyses can be used to further improve coupled geochemical and mechanical models of cement alteration in the wellbore environment.

  13. New additives for minimizing cement body permeability

    SciTech Connect (OSTI)

    Talabani, S. [Western Atlas International, Abu Dhabi (United Arab Emirates); Hareland, G. [New Mexico Inst. of Mining and Technology, Socorro, NM (United States). Dept. of Petroleum Engineering; Islam, M.R. [Univ. of Regina, Saskatchewan (Canada). Faculty of Engineering

    1999-01-01T23:59:59.000Z

    An experimental investigation was carried out with a new array of cement additives, replacing some of the currently used ones. In this study, the cement slurry pressure was monitored during the setting of the element. To obtain the optimum tightness of the cement, final contraction in the cycle is crucial for blockage of gas migration. Concentrations of the additives were obtained experimentally in this study for which the cyclic pressure behavior of the cement was optimized and the permeability reduced for the best final cement results. The parameters investigated in this study were as follows: pressure applied on the slurry with time, compressive strength, and permeability of the set cement. The major causes of the early microfractures are the incomplete cement-water reaction, low compressive strength of the set cement, and the sudden change in the hydrostatic pressure as the cement changes its phase from a liquid to a solid state. This paper reports the appropriate amounts of X-C polymer, Anchorage clay, Ironite Sponge, and synthetic rubber needed to optimize the compressive strength and eliminate both microfracture and microannulus. There are certain limits to the amount and type of synthetic rubber powder for which microfractures are eliminated. The article reports an experimental approach that can be used to eliminate gas migration through a cement design that is environmentally safe and inexpensive, using recyclable materials.

  14. Performance of Concrete Made With Slag Cement and

    E-Print Network [OSTI]

    Performance of Concrete Made With Slag Cement and Portland-Limestone Blended Cement Philadelphia;Today's Discussion ! The materials ! Slag cement ! Portland-limestone cement ! Use in concrete is slag cement? #12;! Non-metallic product of an iron blast furnace ! Granulated ! Ground ! Cementitious

  15. Pauling bond strength, bond length and electron density distribution...

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

    Pauling bond strength, bond length and electron density distribution. Pauling bond strength, bond length and electron density distribution. Abstract: A power law regression...

  16. Characterization of cement minerals, cements and their reaction products at the atomic and nano scale 

    E-Print Network [OSTI]

    Skibsted, Joergen; Hall, Christopher

    Recent advances and highlights in characterization methods are reviewed for cement minerals, cements and their reaction products. The emphasis is on X-ray and neutron diffraction, and on nuclear magnetic resonance methods, ...

  17. Oil prices and government bond risk premiums Herv Alexandre*

    E-Print Network [OSTI]

    Boyer, Edmond

    Oil prices and government bond risk premiums By Hervé Alexandre*º Antonin de Benoist * Abstract : This article analyses the impact of oil price on bond risk premiums issued by emerging economies. No empirical study has yet focussed on the effects of the oil price on government bond risk premiums. We develop

  18. Energy Efficiency Improvement Opportunities for the Cement Industry

    E-Print Network [OSTI]

    Worrell, Ernst

    2008-01-01T23:59:59.000Z

    Emissions from the Global Cement Industry, Annual Review ofThe Use of Limestone in Portland Cement: a State- of-the-Review, Skokie, IL: Portland Cement Association. Dolores, R.

  19. Energy Efficiency Improvement Opportunities for the Cement Industry

    E-Print Network [OSTI]

    Worrell, Ernst

    2008-01-01T23:59:59.000Z

    Emissions from the Global Cement Industry, Annual Review ofBösche, A. , 1993. “Variable Speed Drives in Cement Plants,”World Cement 6 24 pp.2- Buzzi, S. 1997. Die Horomill® - Eine

  20. INVESTIGATIONS ON HYDRAULIC CEMENTS FROM SPENT OIL SHALE

    E-Print Network [OSTI]

    Mehta, P.K.

    2012-01-01T23:59:59.000Z

    CEMENTS FROM SPENT OIL SHALE P.K. Mehta and P. Persoff AprilCement Manufacture from Oil Shale, U.S. Patent 2,904,445,CEMENTS FROM SPENT OIL SHALE P, K, Mehta Civil Engineering

  1. Surety Bond Program (Maryland)

    Broader source: Energy.gov [DOE]

    The Surety Bond Program, a program of the Maryland Small Business Development Financing Authority, assists eligible small businesses in obtaining bid, performance or payment bonds necessary to...

  2. Climate VISION: Private Sector Initiatives: Cement: Resources...

    Office of Scientific and Technical Information (OSTI)

    Resources & Links Technical Information Publications Case Studies Publications Energy Efficiency and Carbon Dioxide Emission Reduction Opportunities in the U.S. Cement Industry,...

  3. Multifunctional Corrosion-resistant Foamed Well Cement Composites...

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

    Multifunctional Corrosion-resistant Foamed Well Cement Composites Multifunctional Corrosion-resistant Foamed Well Cement Composites Multifunctional Corrosion-resistant Foamed Well...

  4. aluminous cement: Topics by E-print Network

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

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 93 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  5. asbestos cement workers: Topics by E-print Network

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

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 152 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  6. asbestos cement: Topics by E-print Network

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

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 123 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  7. antibiotic bone cement: Topics by E-print Network

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

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 142 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  8. asphalt cement: Topics by E-print Network

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

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 187 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  9. ash cement concrete: Topics by E-print Network

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

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 410 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  10. anhydrous portland cements: Topics by E-print Network

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

    present in hardened cement blends in the long term Sheffield, University of 318 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  11. ash substituted cements: Topics by E-print Network

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

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 199 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  12. adhesive resin cement: Topics by E-print Network

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

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 176 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  13. ash belite cement: Topics by E-print Network

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

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 150 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  14. ash cements stabilized: Topics by E-print Network

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

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 173 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  15. aluminate cements hydration: Topics by E-print Network

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

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 5 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  16. asbestos cement dust: Topics by E-print Network

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

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 278 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  17. african portland cement: Topics by E-print Network

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

    present in hardened cement blends in the long term Sheffield, University of 337 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  18. air entraining cement: Topics by E-print Network

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

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 226 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  19. affect cement penetration: Topics by E-print Network

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

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 133 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  20. aluminate cement blended: Topics by E-print Network

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

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 185 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  1. Unique wellhead solves offshore cementing problems

    SciTech Connect (OSTI)

    Not Available

    1985-02-01T23:59:59.000Z

    A special subsea wellhead assembly that allows 2stage cementing (from both top and bottom) in weak, unconsolidated seabed sediments has been used successfully from a semi-submersible rig offshore Malta. Presented here is a description of the system and a discussion of operational considerations used to set and cement 20 and 16-in. surface casing strings.

  2. A four-point bending test for the bonding evaluation of composite pavement

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A four-point bending test for the bonding evaluation of composite pavement M. Hun1 , A. Chabot1 , F investigate the crack initiation and propagation at the interface between layers of composite pavements affects the durability of composite pavements made with asphalt and cement materials. Two main problems

  3. Portland Cement Concrete Pavement Shannon Golden, Alabama DOT

    E-Print Network [OSTI]

    Portland Cement Concrete Pavement Shannon Golden, Alabama DOT PORTLAND CEMENT CONCRETE PAVEMENT may be substituted for part of the required Portland cement. Substitution of mineral admixtures shall Cement shall not exceed the percentages shown in the following table: MAXIMUM ALLOWABLE SUBSTITUTION

  4. Scanning electron microscopy imaging of hydraulic cement microstructure

    E-Print Network [OSTI]

    Bentz, Dale P.

    Scanning electron microscopy imaging of hydraulic cement microstructure by Paul Stutzman Building Reprinted from Cement and Concrete Composites, Vol. 26, No. 8, 957-966 pp., November 2004. NOTE: This paper;Available online at www.sciencedirect.com SCIENCE@OIRECT@ Cement & Concrete CompositesELSEVIER Cement

  5. Controlling dust when cutting fibre-cement board

    E-Print Network [OSTI]

    Knowles, David William

    Controlling dust when cutting fibre-cement board Page 1 of 2 Cutting fibre-cement board (e are not typically used when cutting and shaping fibre-cement board. To protect yourself you should: Use one of the methods described above for cutting fibre-· cement board Inspect the dust control equipment before you

  6. Bond Financing (New Jersey)

    Broader source: Energy.gov [DOE]

    Bond financing is available to eligible businesses through the New Jersey Economic Development Authority, in the amount of $500,000 to $10 million. The bonds can be used to finance capital...

  7. Essays on corporate bonds

    E-Print Network [OSTI]

    Bao, Jack (Jack C.)

    2009-01-01T23:59:59.000Z

    This thesis consists of three empirical essays on corporate bonds, examining the role of both credit risk and liquidity. In the first chapter, I test the ability of structural models of default to price corporate bonds in ...

  8. Opportunities for Energy Efficiency and Demand Response in the California Cement Industry

    E-Print Network [OSTI]

    Olsen, Daniel

    2012-01-01T23:59:59.000Z

    D.  Tamás.  “Burnability of Cement Raw Materials at Rapid Calcination Conditions. ” Cement and Concrete Research and Herman H.  Tseng.  Cement Plant Operations Handbook: 

  9. Potential Energy Savings and CO2 Emissions Reduction of China's Cement Industry

    E-Print Network [OSTI]

    Ke, Jing

    2013-01-01T23:59:59.000Z

    House, Beijing. CCA (China Cement Association), 2009.China Cement Almanac 2008. Jiangsu People'sHouse, Nanjing. CCA (China Cement Association), 2010. China

  10. Analysis of Energy-Efficiency Opportunities for the Cement Industry in Shandong Province, China

    E-Print Network [OSTI]

    Price, Lynn

    2010-01-01T23:59:59.000Z

    obsolete vertical shaft kiln (VSK) cement plants, with theobsolete vertical shaft kiln (VSK) cement plants, with theobsolete vertical shaft kiln (VSK) cement plants, with the

  11. Local Government Revenue Bonds (Montana)

    Broader source: Energy.gov [DOE]

    Limited obligation local government bonds ("special revenue bonds") may be issued for qualified electric energy generation facilities, including those powered by renewables. These bonds generally...

  12. A nanochemomechanical investigation of carbonated cement paste

    E-Print Network [OSTI]

    Vanzo, James (James F.)

    2009-01-01T23:59:59.000Z

    Concrete, and in particular its principal component, cement paste, has an interesting relation with carbon dioxide. Concrete is a carbon dioxide generator-- it is estimated that 5-10% of atmospheric CO? comes from this ...

  13. HYDRAULIC CEMENT PREPARATION FROM LURGI SPENT SHALE

    E-Print Network [OSTI]

    Mehta, P.K.

    2013-01-01T23:59:59.000Z

    cement from spent oil shale," Vol. 10, No. 4, p. 54S,Colorado's primary oil shale resource for vertical modifiedSimulated effects of oil-shale development on the hydrology

  14. HYDRAULIC CEMENT PREPARATION FROM LURGI SPENT SHALE

    E-Print Network [OSTI]

    Mehta, P.K.

    2013-01-01T23:59:59.000Z

    hydraulic cement from spent oil shale," Vol. 10, No. 4, p.J. W. , "Colorado's primary oil shale resource for verticalSimulated effects of oil-shale development on the hydrology

  15. Climate VISION: Private Sector Initiatives: Cement

    Office of Scientific and Technical Information (OSTI)

    Association Logo The Portland Cement Association has committed to a 10% reduction in carbon dioxide (CO2) emissions per ton of cementitious product produced or sold from a 1990...

  16. Supply chain management in the cement industry

    E-Print Network [OSTI]

    Agudelo, Isabel

    2009-01-01T23:59:59.000Z

    Traditionally supply chain management has played an operational role within cement and mineral extraction commodity companies. Recently, cost reduction projects have brought supply chain management into the limelight. In ...

  17. Wearability of Portland Cement Concrete Pavement Finishes

    E-Print Network [OSTI]

    McKeen, William Rew

    1971-01-01T23:59:59.000Z

    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...

  18. Cold bond agglomeration of waste oxides for recycling

    SciTech Connect (OSTI)

    D`Alessio, G.; Lu, W.K. [McMaster Univ., Hamilton, Ontario (Canada). Dept. of Materials Science and Engineering

    1996-12-31T23:59:59.000Z

    Recycling of waste oxides has been an on-going challenge for integrated steel plants. The majority of these waste oxides are collected from the cleaning systems of ironmaking and steelmaking processes, and are usually in the form of fine particulates and slurries. In most cases, these waste materials are contaminated by oils and heavy metals and often require treatment at a considerable expense prior to landfill disposal. This contamination also limits the re-use or recycling potential of these oxides as secondary resources of reliable quality. However, recycling of some selected wastes in blast furnaces or steelmaking vessels is possible, but first requires agglomeration of the fine particulate by such methods as cold bond briquetting. Cold bond briquetting technology provides both mechanical compacting and bonding (with appropriate binders) of the particulates. This method of recycling has the potential to be economically viable and environmentally sustainable. The nature of the present study is cold bond briquetting of iron ore pellet fines with a molasses-cement-H{sub 2}O binder for recycling in a blast furnace. The inclusion of molasses is for its contribution to the green strength of briquettes. During the curing stage, significant gains in strength may be credited to molasses in the presence of cement. The interactions of cement (and its substitutes), water and molasses and their effects on the properties of the agglomerates during and after various curing conditions were investigated. Tensile strengths of briquettes made in the laboratory and subjected to experimental conditions which simulated the top part of a blast furnace shaft were also examined.

  19. Bonding thermoplastic polymers

    DOE Patents [OSTI]

    Wallow, Thomas I. (Fremont, CA); Hunter, Marion C. (Livermore, CA); Krafcik, Karen Lee (Livermore, CA); Morales, Alfredo M. (Livermore, CA); Simmons, Blake A. (San Francisco, CA); Domeier, Linda A. (Danville, CA)

    2008-06-24T23:59:59.000Z

    We demonstrate a new method for joining patterned thermoplastic parts into layered structures. The method takes advantage of case-II permeant diffusion to generate dimensionally controlled, activated bonding layers at the surfaces being joined. It is capable of producing bonds characterized by cohesive failure while preserving the fidelity of patterned features in the bonding surfaces. This approach is uniquely suited to production of microfluidic multilayer structures, as it allows the bond-forming interface between plastic parts to be precisely manipulated at micrometer length scales. The bond enhancing procedure is easily integrated in standard process flows and requires no specialized equipment.

  20. Private Activity Revenue Bonds (Maryland)

    Broader source: Energy.gov [DOE]

    Private Activity Revenue Bonds are available in the form of both taxable bonds and tax-exempt bonds. Both types of bonds provide access to long-term capital markets for fixed asset financing....

  1. Miscellaneous Analyses.

    E-Print Network [OSTI]

    Adriance, Duncan; Tilson, P. S.; Harrington, H. H.

    1895-01-01T23:59:59.000Z

    . The am ount o f c lay in the ? black w axy" is shown by tlie con ten t Of alum ina to be greater than that in tlie sandy loam . T lie soil from E l Paso was selected from a field in tended for the grow th of fru it trees. CLAYS. The exam... ination o f these was made for a com pany that expected to ex trac t the m etal a lum inum from clay . Complete analyses were made in on ly a few eases; since the alum ina and lim e were the two principal in ? gred ien ts wanted , other...

  2. Identification of Concrete Incompatibilities Using Cement Paste Rheology

    E-Print Network [OSTI]

    Jang, Se Hoon

    2010-07-14T23:59:59.000Z

    for her encouragement, and to my wife and son for their patience and love. vii NOMENCLATURE DSR Dynamic Shear Rheometer OPC Ordinary Portland Cement RMA Rheology Modifying Admixture MWRA Medium-range Water Reducing Admixture WRRA Water.../II ordinary portland cement C4 Type V low C3A cement F35 Class F fly ash with 35% replacement of cement weight C35 Class C fly ash with 35% replacement of cement weight S50 Granulated Slag with 50% replacement of cement weight X15TD Lignin based Type A...

  3. Wellbore cement fracture evolution at the cement–basalt caprock interface during geologic carbon sequestration

    SciTech Connect (OSTI)

    Jung, Hun Bok; Kabilan, Senthil; Carson, James P.; Kuprat, Andrew P.; Um, Wooyong; Martin, Paul F.; Dahl, Michael E.; Kafentzis, Tyler A.; Varga, Tamas; Stephens, Sean A.; Arey, Bruce W.; Carroll, KC; Bonneville, Alain; Fernandez, Carlos A.

    2014-08-01T23:59:59.000Z

    Composite Portland cement-basalt caprock cores with fractures, as well as neat Portland cement columns, were prepared to understand the geochemical and geomechanical effects on the integrity of wellbores with defects during geologic carbon sequestration. The samples were reacted with CO2-saturated groundwater at 50 ºC and 10 MPa for 3 months under static conditions, while one cement-basalt core was subjected to mechanical stress at 2.7 MPa before the CO2 reaction. Micro-XRD and SEM-EDS data collected along the cement-basalt interface after 3-month reaction with CO2-saturated groundwater indicate that carbonation of cement matrix was extensive with the precipitation of calcite, aragonite, and vaterite, whereas the alteration of basalt caprock was minor. X-ray microtomography (XMT) provided three-dimensional (3-D) visualization of the opening and interconnection of cement fractures due to mechanical stress. Computational fluid dynamics (CFD) modeling further revealed that this stress led to the increase in fluid flow and hence permeability. After the CO2-reaction, XMT images displayed that calcium carbonate precipitation occurred extensively within the fractures in the cement matrix, but only partially along the fracture located at the cement-basalt interface. The 3-D visualization and CFD modeling also showed that the precipitation of calcium carbonate within the cement fractures after the CO2-reaction resulted in the disconnection of cement fractures and permeability decrease. The permeability calculated based on CFD modeling was in agreement with the experimentally determined permeability. This study demonstrates that XMT imaging coupled with CFD modeling represent a powerful tool to visualize and quantify fracture evolution and permeability change in geologic materials and to predict their behavior during geologic carbon sequestration or hydraulic fracturing for shale gas production and enhanced geothermal systems.

  4. Bonded semiconductor substrate

    DOE Patents [OSTI]

    Atwater, Jr.; Harry A. (South Pasadena, CA), Zahler; James M. (Pasadena, CA)

    2010-07-13T23:59:59.000Z

    Ge/Si and other nonsilicon film heterostructures are formed by hydrogen-induced exfoliation of the Ge film which is wafer bonded to a cheaper substrate, such as Si. A thin, single-crystal layer of Ge is transferred to Si substrate. The bond at the interface of the Ge/Si heterostructures is covalent to ensure good thermal contact, mechanical strength, and to enable the formation of an ohmic contact between the Si substrate and Ge layers. To accomplish this type of bond, hydrophobic wafer bonding is used, because as the invention demonstrates the hydrogen-surface-terminating species that facilitate van der Waals bonding evolves at temperatures above 600.degree. C. into covalent bonding in hydrophobically bound Ge/Si layer transferred systems.

  5. Fe-containing phases in hydrated cements

    SciTech Connect (OSTI)

    Dilnesa, B.Z., E-mail: belay.dilnesa@gmail.com [Empa, Laboratory for Concrete and Construction Chemistry, Überlandstrasse 129, 8600 Dübendorf (Switzerland); Wieland, E. [Paul Scherrer Institute, Laboratory for Waste Management, 5232 Villigen PSI (Switzerland); Lothenbach, B. [Empa, Laboratory for Concrete and Construction Chemistry, Überlandstrasse 129, 8600 Dübendorf (Switzerland); Dähn, R. [Paul Scherrer Institute, Laboratory for Waste Management, 5232 Villigen PSI (Switzerland); Scrivener, K.L. [Ecole Polytechnique Federal de Lausanne (EPFL), Laboratory for Construction Materials, 1015 Lausanne (Switzerland)

    2014-04-01T23:59:59.000Z

    In this study synchrotron X-ray absorption spectroscopy (XAS) has been applied, an element specific technique which allows Fe-containing phases to be identified in the complex mineral mixture of hydrated cements. Several Fe species contributed to the overall Fe K-edge spectra recorded on the cement samples. In the early stage of cement hydration ferrite was the dominant Fe-containing mineral. Ferrihydrite was detected during the first hours of the hydration process. After 1 day the formation of Al- and Fe-siliceous hydrogarnet was observed, while the amount of ferrihydrite decreased. The latter finding agrees with thermodynamic modeling, which predicts the formation of Fe-siliceous hydrogarnet in Portland cement systems. The presence of Al- and Fe-containing siliceous hydrogarnet was further substantiated in the residue of hydrated cement by performing a selective dissolution procedure. - Highlights: • Fe bound to ferrihydrite at early age hydration • Fe found to be stable in siliceous hydrogarnet at longer term age hydration • Fe-containing AFt and AFm phases are less stable than siliceous hydrogarnet. • The study demonstrates EXAFS used to identify amorphous or poorly crystalline phases.

  6. Trending: Metal Oxo Bonds

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

    including materials science, chemistry, and biology. Highly covalent metal-oxygen multiple bonds (metal oxos) are the building blocks of metal oxides and have a bearing...

  7. Regional distribution of diagenetic carbonate cement in Palaeocene deepwater

    E-Print Network [OSTI]

    Haszeldine, Stuart

    Regional distribution of diagenetic carbonate cement in Palaeocene deepwater sandstones: North Sea. This study attempts to make a large-scale regional examination of the distribution of carbonate cements

  8. Development of an Improved Cement for Geothermal Wells

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. Project objectives: Develop a novel, zeolite-containing lightweight, high temperature, high pressure geothermal cement, which will provide operators with an easy to use, flexible cementing system that saves time and simplifies logistics.

  9. INVESTIGATIONS ON HYDRAULIC CEMENTS FROM SPENT OIL SHALE

    E-Print Network [OSTI]

    Mehta, P.K.

    2012-01-01T23:59:59.000Z

    ON HYDRAULIC CEMENTS FROM SPENT OIL SHALE P.K. Mehta and P.Cement Manufacture from Oil Shale, U.S. Patent 2,904,445,203 (1974), E. D. York, Amoco Oil Co. , letter to J, P. Fox,

  10. INVESTIGATIONS ON HYDRAULIC CEMENTS FROM SPENT OIL SHALE

    E-Print Network [OSTI]

    Mehta, P.K.

    2012-01-01T23:59:59.000Z

    20 to 40% of the oil shale, and explosively rubblizing andCEMENTS FROM SPENT OIL SHALE P.K. Mehta and P. Persoff AprilCement Manufacture from Oil Shale, U.S. Patent 2,904,445,

  11. Z .Surface and Coatings Technology 130 2000 164 172 Production of high-density Ni-bonded tungsten carbide

    E-Print Network [OSTI]

    Ghoniem, Nasr M.

    Z .Surface and Coatings Technology 130 2000 164 172 Production of high-density Ni-bonded tungsten spraying; Nickel; Tungsten carbide 1. Introduction 1.1. General Since the mid-1990s, the market share of cemented Z .carbides has surpassed that of high-speed steels HSS , Z .with tungsten carbide WC having 50

  12. High temperature expanding cement composition and use

    DOE Patents [OSTI]

    Nelson, Erik B. (Tulsa County, OK); Eilers, Louis H. (Rogers County, OK)

    1982-01-01T23:59:59.000Z

    A hydratable cement composition useful for preparing a pectolite-containing expanding cement at temperatures above about 150.degree. C. comprising a water soluble sodium salt of a weak acid, a 0.1 molar aqueous solution of which salt has a pH of between about 7.5 and about 11.5, a calcium source, and a silicon source, where the atomic ratio of sodium to calcium to silicon ranges from about 0.3:0.6:1 to about 0.03:1:1; aqueous slurries prepared therefrom and the use of such slurries for plugging subterranean cavities at a temperature of at least about 150.degree. C. The invention composition is useful for preparing a pectolite-containing expansive cement having about 0.2 to about 2 percent expansion, by volume, when cured at at least 150.degree. C.

  13. ASCE Journal of Materials in Civil Engineering, 20 (7), 502-508, 2008. Early-Age Properties of Cement-Based Materials: I. Influence of Cement Fineness

    E-Print Network [OSTI]

    Bentz, Dale P.

    of Cement-Based Materials: I. Influence of Cement Fineness Dale P. Bentz1* , Gaurav Sant1 , and Jason Weiss1 Abstract The influence of cement fineness on early-age properties of cement-based materials is investigated deformation. Measurements of these properties for two cements of widely different fineness are supplemented

  14. Microcapsule-Induced Toughening of Bone Cement Gina M. Miller

    E-Print Network [OSTI]

    Sottos, Nancy R.

    27 Microcapsule-Induced Toughening of Bone Cement Gina M. Miller Senior in Aerospace Engineering R. White, and TAM Prof. Nancy R. Sottos Acrylic bone cement is the primary material used cement, it may be possible to extend the lifetime of the implant, thus reducing the occurrence

  15. Characterizing Curing-Cement Slurries by Permeability, Tensile Strength,

    E-Print Network [OSTI]

    Backe, Knut

    Characterizing Curing-Cement Slurries by Permeability, Tensile Strength, and Shrinkage K.R. Backe oilwell cements. The results show that the curing characteristics are a function of temperature and that there is a correlation between shrinkage and cement content. The paper also introduces a new mechanism for gas migration

  16. THE PULTRUSION TECHNOLOGY FOR THE PRODUCTION OF FABRIC-CEMENT

    E-Print Network [OSTI]

    Mobasher, Barzin

    THE PULTRUSION TECHNOLOGY FOR THE PRODUCTION OF FABRIC-CEMENT COMPOSITES Alva Peled Structural Engineering, Arizona State University, USA #12;Advantages of Fabrics in Cement Composites 0 300 600 900 0 2 4 6 8 Deflection, mm FlexuralLoad,N Fabrics Continuous Fibers Cement Matrix #12;Fabrics

  17. Communication Effect of stress on the electric polarization in cement

    E-Print Network [OSTI]

    Chung, Deborah D.L.

    Communication Effect of stress on the electric polarization in cement Sihai Wen, D.D.L. Chung the extent of electric polarization in the transverse direction in cement pastes with and without carbon smaller when carbon fibers were present. It was smaller for carbon fiber cement paste containing silica

  18. MODELING OF HYDRATION KINETICS AND SHRINKAGE OF PORTLAND CEMENT PASTE

    E-Print Network [OSTI]

    Meyer, Christian

    MODELING OF HYDRATION KINETICS AND SHRINKAGE OF PORTLAND CEMENT PASTE Feng Lin Submitted in partial and Sciences COLUMBIA UNIVERSITY 2006 #12;MODELING OF HYDRATION KINETICS AND SHRINKAGE OF PORTLAND CEMENT PASTE;ABSTRACT MODELING OF HYDRATION KINETICS AND SHRINKAGE OF PORTLAND CEMENT PASTE Feng Lin A mathematical

  19. Integer linear programming models for a cement delivery problem

    E-Print Network [OSTI]

    Hertz, Alain

    Integer linear programming models for a cement delivery problem Alain Hertz D´epartement de math.uldry@unifr.ch and marino.widmer@unifr.ch April 4, 2011 Abstract We consider a cement delivery problem with an heterogeneous in [14], [15] and [16] and are reviewed in [4]. In this paper, we study a cement delivery problem which

  20. Modeling of Sulfate Resistance of Flyash Blended Cement Concrete Materials

    E-Print Network [OSTI]

    Mobasher, Barzin

    Modeling of Sulfate Resistance of Flyash Blended Cement Concrete Materials Barzin Mobasher1. A simplified model is presented which used cement chemistry, concrete physics, and mechanics to develop of hardened concrete, principally the cement paste, caused by exposure of concrete to sulfates and moisture

  1. Micromechanical Modeling of Filament Wound Cement-Based Composites

    E-Print Network [OSTI]

    Mobasher, Barzin

    Micromechanical Modeling of Filament Wound Cement-Based Composites B. Mobasher, M.ASCE1 Abstract: A theoretical model to predict the response of laminated cement-based composites is developed. The micromechanical model simulates the mechanical response of a multilayer cement-based composite laminate under

  2. Microscale Investigations of Ni Uptake by Cement Using a

    E-Print Network [OSTI]

    Microscale Investigations of Ni Uptake by Cement Using a Combination of Scanning Electron Laboratory, IMX, Ecole Polytechnique Fe´de´ral de Lausanne (EPFL), 1015 Lausanne, Switzerland Cement is used-level radioactive waste. In this study, Ni uptake by hardened cement paste has been investigated with the aim

  3. 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

  4. Guide to Cement-Based Integrated Pavement Solutions

    E-Print Network [OSTI]

    Guide to Cement-Based Integrated Pavement Solutions August 2011 #12;Cement-Based Integrated Pavement Solutions Heavy Industrial Airports Highways Country Roads Arterials Commercial Commercial Residential Recreation LAND USE CEMENT-BASED INTEGRATED PAVEMENT SOLUTIONS 1 2 3 4 5 6 7 8

  5. Encapsulation of mixed radioactive and hazardous waste contaminated incinerator ash in modified sulfur cement

    SciTech Connect (OSTI)

    Kalb, P.D.; Heiser, J.H. III; Colombo, P.

    1990-01-01T23:59:59.000Z

    Some of the process waste streams incinerated at various Department of Energy (DOE) facilities contain traces of both low-level radioactive (LLW) and hazardous constituents, thus yielding ash residues that are classified as mixed waste. Work is currently being performed at Brookhaven National Laboratory (BNL) to develop new and innovative materials for encapsulation of DOE mixed wastes including incinerator ash. One such material under investigation is modified sulfur cement, a thermoplastic developed by the US Bureau of Mines. Monolithic waste forms containing as much as 55 wt % incinerator fly ash from Idaho national Engineering Laboratory (INEL) have been formulated with modified sulfur cement, whereas maximum waste loading for this waste in hydraulic cement is 16 wt %. Compressive strength of these waste forms exceeded 27.6 MPa. Wet chemical and solid phase waste characterization analyses performed on this fly ash revealed high concentrations of soluble metal salts including Pb and Cd, identified by the Environmental Protection Agency (EPA) as toxic metals. Leach testing of the ash according to the EPA Toxicity Characteristic Leaching Procedure (TCLP) resulted in concentrations of Pb and Cd above allowable limits. Encapsulation of INEL fly ash in modified sulfur cement with a small quantity of sodium sulfide added to enhance retention of soluble metal salts reduced TCLP leachate concentrations of Pb and Cd well below EPA concentration criteria for delisting as a toxic hazardous waste. 12 refs., 4 figs., 2 tabs.

  6. Influence of Cement Particle-Size Distribution on Early Age Autogenous Strains and Stresses in Cement-Based Materials

    E-Print Network [OSTI]

    Bentz, Dale P.

    Influence of Cement Particle-Size Distribution on Early Age Autogenous Strains and Stresses in Cement-Based Materials Dale P. Bentz* Building and Fire Research Laboratory, National Institute-Jochen Haecker* Wilhelm Dyckerhoff Institut, 65203 Wiesbaden, Germany The influence of cement particle

  7. Bond Financing Program (New Hampshire)

    Broader source: Energy.gov [DOE]

    BFA’s Bond Financing Program offers tax-exempt and taxable bonds for fixed-asset expansion projects. Industrial development revenue bonds can be used by manufacturers for the acquisition,...

  8. Native Hydrogen Bonds in a Molten Globule: The Apoflavodoxin Thermal Intermediate

    E-Print Network [OSTI]

    Sancho, Javier

    Native Hydrogen Bonds in a Molten Globule: The Apoflavodoxin Thermal Intermediate MarõÂa P. IruÂn1 in surface- exposed hydrogen bonds connecting secondary-structure elements in the native protein. All hydrogen bonds analysed are formed in the molten globule intermediate, either with native strength

  9. How to run and cement liners

    SciTech Connect (OSTI)

    Bowman, G.R.; Sherer, B.

    1988-09-01T23:59:59.000Z

    Testing the top of a liner after it has been cemented is necessary to ensure a well's integrity. However, whether done with or without packers there are potential problems attendant with either method that can occur if the tests are not properly engineered. A discussion of these problems and ways to avoid them is presented.

  10. Low Temperature Material Bonding Technique

    DOE Patents [OSTI]

    Ramsey, J. Michael (Knoxville, TN); Foote, Robert S. (Oak Ridge, TN)

    2000-10-10T23:59:59.000Z

    A method of performing a lower temperature bonding technique to bond together two mating pieces of glass includes applying a sodium silicate aqueous solution between the two pieces.

  11. Low temperature material bonding technique

    DOE Patents [OSTI]

    Ramsey, J. Michael (Knoxville, TN); Foote, Robert S. (Oak Ridge, TN)

    2002-02-12T23:59:59.000Z

    A method of performing a lower temperature bonding technique to bond together two mating pieces of glass includes applying a sodium silicate aqueous solution between the two pieces.

  12. Bonding aerogels with polyurethanes

    SciTech Connect (OSTI)

    Matthews, F.M.; Hoffman, D.M.

    1989-11-01T23:59:59.000Z

    Aerogels, porous silica glasses with ultra-fine cell size (30nm), are made by a solution gelation (sol-gel) process. The resulting gel is critical point dried to densities from 0.15--0.60 g/cc. This material is machinable, homogeneous, transparent, coatable and bondable. To bond aerogel an adhesive should have long cure time, no attack on the aerogel structure, and high strength. Several epoxies and urethanes were examined to determine if they satisfied these conditions. Bond strengths above 13 psi were found with double bubble and DP-110 epoxies and XI-208/ODA-1000 and Castall U-2630 urethanes. Hardman Kalex Tough Stuff'' A-85 hardness urethane gave 18 psi bond strength. Hardman A-85, Tuff-Stuff'' was selected for further evaluation because it produced bond strengths comparable to the adherend cohesive strength. 5 refs., 2 figs.

  13. The New Chemical Bond

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

    off when the first convincing experimental evidence of the phi bond showed up for the thorium sandwich complex, as revealed by its elaborate, never-before-seen symmetry. The...

  14. Characterization of anodic bonding

    E-Print Network [OSTI]

    Tudryn, Carissa Debra, 1978-

    2004-01-01T23:59:59.000Z

    Anodic bonding is a common process used in MicroElectroMechanical Systems (MEMS) device fabrication and packaging. Polycrystalline chemical vapor deposited (CVD) silicon carbide (SiC) is emerging as a new MEMS device and ...

  15. Water's Hydrogen Bond Strength

    E-Print Network [OSTI]

    Martin Chaplin

    2007-06-10T23:59:59.000Z

    Water is necessary both for the evolution of life and its continuance. It possesses particular properties that cannot be found in other materials and that are required for life-giving processes. These properties are brought about by the hydrogen bonded environment particularly evident in liquid water. Each liquid water molecule is involved in about four hydrogen bonds with strengths considerably less than covalent bonds but considerably greater than the natural thermal energy. These hydrogen bonds are roughly tetrahedrally arranged such that when strongly formed the local clustering expands, decreasing the density. Such low density structuring naturally occurs at low and supercooled temperatures and gives rise to many physical and chemical properties that evidence the particular uniqueness of liquid water. If aqueous hydrogen bonds were actually somewhat stronger then water would behave similar to a glass, whereas if they were weaker then water would be a gas and only exist as a liquid at sub-zero temperatures. The overall conclusion of this investigation is that water's hydrogen bond strength is poised centrally within a narrow window of its suitability for life.

  16. Assessment of Energy Efficiency Improvement and CO2 Emission Reduction Potentials in the Cement Industry in China

    E-Print Network [OSTI]

    Hasanbeigi, Ali

    2013-01-01T23:59:59.000Z

    Economic Output in Chinese Cement Kilns,” Proceedings of thereduction of China’s cement industry. Energy Policy 45 (751. Kong, Xiangzhong (China Cement Association, CCA), 2009.

  17. Corrosion-resistant Foamed Cements for Carbon Steels

    SciTech Connect (OSTI)

    Sugama T.; Gill, S.; Pyatina, T., Muraca, A.; Keese, R.; Khan, A.; Bour, D.

    2012-12-01T23:59:59.000Z

    The cementitious material consisting of Secar #80, Class F fly ash, and sodium silicate designed as an alternative thermal-shock resistant cement for the Enhanced Geothermal System (EGS) wells was treated with cocamidopropyl dimethylamine oxide-based compound as foaming agent (FA) to prepare numerous air bubble-dispersed low density cement slurries of and #61603;1.3 g/cm3. Then, the foamed slurry was modified with acrylic emulsion (AE) as corrosion inhibitor. We detailed the positive effects of the acrylic polymer (AP) in this emulsion on the five different properties of the foamed cement: 1) The hydrothermal stability of the AP in 200 and #61616;C-autoclaved cements; 2) the hydrolysis-hydration reactions of the slurry at 85 and #61616;C; 3) the composition of crystalline phases assembled and the microstructure developed in autoclaved cements; 4) the mechanical behaviors of the autoclaved cements; and, 5) the corrosion mitigation of carbon steel (CS) by the polymer. For the first property, the hydrothermal-catalyzed acid-base interactions between the AP and cement resulted in Ca-or Na-complexed carboxylate derivatives, which led to the improvement of thermal stability of the AP. This interaction also stimulated the cement hydration reactions, enhancing the total heat evolved during cement’s curing. Addition of AP did not alter any of the crystalline phase compositions responsible for the strength of the cement. Furthermore, the AP-modified cement developed the porous microstructure with numerous defect-free cavities of disconnected voids. These effects together contributed to the improvement of compressive-strength and –toughness of the cured cement. AP modification of the cement also offered an improved protection of CS against brine-caused corrosion. There were three major factors governing the corrosion protection: 1) Reducing the extents of infiltration and transportation of corrosive electrolytes through the cement layer deposited on the underlying CS surfaces; 2) inhibiting the cathodic reactions at the corrosion site of CS; 3) extending the coverage of cement over CS surfaces; and, 4) improving the adherence of the cement to CS surfaces. Thus, the CS’s corrosion rate of 176 milli inch/per year (mpy) for 1 wt% FA-foamed cement without AP was considerably reduced to 69 mpy by adding only 2 wt% AP. Addition of AP at 10 wt% further reduced this rate to less than 10 mpy.

  18. New techniques for monitoring cement hydration under simulated well conditions

    SciTech Connect (OSTI)

    Luke, K.; Hall, C.; Jones, T. [Schlumberger Cambridge Research (United Kingdom); Barnes, P.; Turillas, X.; Lewis, A. [Univ. of London (United Kingdom). Birkbeck College

    1995-11-01T23:59:59.000Z

    Fourier transform infrared spectroscopy and synchrotron X-ray powder diffraction methods are described for studying cement hydration chemistry at temperatures up to 200 C, covering the normal temperature range of wellbore cementing. The methods provide complementary information on the transformation of silicate, ferrite and sulfate minerals. The thermal decomposition of the cement mineral ettringite is shown to occur at 114 C in a sealed system in contact with water. The FTIR spectrum of a well cement slurry hydrating at 150 C and 2,000 psi is analyzed. The anomalous thickening time behavior of certain cements around 75--100 C is discussed in the light of new data on the hydration of a Class G cement at 65 and 95 C, with and without retarder.

  19. Effective Permeability Change in Wellbore Cement with Carbon Dioxide Reaction

    SciTech Connect (OSTI)

    Um, Wooyong; Jung, Hun Bok; Martin, Paul F.; McGrail, B. Peter

    2011-11-01T23:59:59.000Z

    Portland cement, a common sealing material for wellbores for geological carbon sequestration was reacted with CO{sub 2} in supercritical, gaseous, and aqueous phases at various pressure and temperature conditions to simulate cement-CO{sub 2} reaction along the wellbore from carbon injection depth to the near-surface. Hydrated Portland cement columns (14 mm diameter x 90 mm length; water-to-cement ratio = 0.33) including additives such as steel coupons and Wallula basalt fragments were reacted with CO{sub 2} in the wet supercritical (the top half) and dissolved (the bottom half) phases under carbon sequestration condition with high pressure (10 MPa) and temperature (50 C) for 5 months, while small-sized hydrated Portland cement columns (7 mm diameter x 20 mm length; water-to-cement ratio = 0.38) were reacted with CO{sub 2} in dissolved phase at high pressure (10 MPa) and temperature (50 C) for 1 month or with wet CO{sub 2} in gaseous phase at low pressure (0.2 MPa) and temperature (20 C) for 3 months. XMT images reveal that the cement reacted with CO{sub 2} saturated groundwater had degradation depth of {approx}1 mm for 1 month and {approx}3.5 mm for 5 month, whereas the degradation was minor with cement exposure to supercritical CO{sub 2}. SEM-EDS analysis showed that the carbonated cement was comprised of three distinct zones; the innermost less degraded zone with Ca atom % > C atom %, the inner degraded zone with Ca atom % {approx} C atom % due to precipitation of calcite, the outer degraded zone with C atom % > Ca atom % due to dissolution of calcite and C-S-H, as well as adsorption of carbon to cement matrix. The outer degraded zone of carbonated cement was porous and fractured because of dissolution-dominated reaction by carbonic acid exposure, which resulted in the increase in BJH pore volume and BET surface area. In contrast, cement-wet CO{sub 2}(g) reaction at low P (0.2 MPa)-T (20 C) conditions for 1 to 3 months was dominated by precipitation of micron-sized calcite on the outside surface of cement, which resulted in the decrease in BJH pore volume and BET surface area. Cement carbonation and pore structure change are significantly dependent on pressure and temperature conditions as well as the phase of CO{sub 2}, which controls the balance between precipitation and dissolution in cement matrix. Geochemical modeling result suggests that ratio of solid (cement)-to-solution (carbonated water) has a significant effect on cement carbonation, thus the cement-CO{sub 2} reaction experiment needs to be conducted under realistic conditions representing the in-situ wellbore environment of carbon sequestration field site. Total porosity and air permeability for a duplicate cement column with water-to-cement ratio of 0.38 measured after oven-drying by Core Laboratories using Boyle's Law technique and steady-state method were 31% and 0.576 mD. A novel method to measure the effective liquid permeability of a cement column using X-ray micro-tomography images after injection of pressurized KI (potassium iodide) is under development by PNNL. Preliminary results indicate the permeability of a cement column with water-to-cement ratio of 0.38 is 4-8 mD. PNNL will apply the method to understand the effective permeability change of Portland cement by CO{sub 2}(g) reaction under a variety of pressure and temperature conditions to develop a more reliable well-bore leakage risk model.

  20. Preparation of porous apatite granules from calcium phosphate cement

    E-Print Network [OSTI]

    Tas, A. Cuneyt

    Preparation of porous apatite granules from calcium phosphate cement A. C. Tas Received: 30 March and 37 °C. A CaP cement powder, comprising a-Ca3(PO4)2 (61 wt.%), CaH- PO4 (26%), CaCO3 (10 to 1 mm. Cement powder (35 wt.%) and NaCl (65 wt.%) mixture was kneaded with an ethanol­Na2HPO4

  1. Bottom-up Representation of Industrial Energy Efficiency Technologies in Integrated Assessment Models for the Cement Sector

    E-Print Network [OSTI]

    Sathaye, J.

    2011-01-01T23:59:59.000Z

    10 References Anonymous. 1994. Cement Plant Modernization inCentral Europe, World Cement (November): 35-38 Bösche, A.Variable Speed Drives in Cement Plants, World Cement 6 24

  2. Analytical simulation of tensile response of fabric reinforced cement based composites

    E-Print Network [OSTI]

    Mobasher, Barzin

    Analytical simulation of tensile response of fabric reinforced cement based composites Barzin March 2005; accepted 2 June 2005 Abstract A model simulating the tensile behavior of fabric­cement composites; Cement composites; Laminated composites; Pultrusion; Fibers; Fabrics; Toughness; Strength; Micro

  3. Analytical simulation of tensile response of fabric reinforced cement based composites

    E-Print Network [OSTI]

    Mobasher, Barzin

    Analytical simulation of tensile response of fabric reinforced cement based composites Barzin the tensile behavior of fabric­cement composites is presented to relate the properties of the matrix, fabric reserved. Keywords: Fabric reinforced composites; Cement composites; Laminated composites; Pultrusion

  4. Promoting Energy Efficiency in Cement Making: The ENERGY STAR(R) for Industry Program

    E-Print Network [OSTI]

    Masanet, Eric; Worrell, Ernst

    2007-01-01T23:59:59.000Z

    information Energy Guide for Cement Making, please contact:Saving Opportunities for the Cement Industry: An ENERGY STARindex.cfm? c=in_focus.bus_cement_manuf_focus Based on data

  5. Effect of high temperature on mechanical and physical properties of lightweight cement

    E-Print Network [OSTI]

    North Texas, University of

    Effect of high temperature on mechanical and physical properties of lightweight cement based are used for fire resistance applications. Concrete with vermiculite can be used as cement based refractory. Keywords: Expanded vermiculite, Lightweight concrete, Cement based refractory Introduction Concrete

  6. Policy Options for Encouraging Energy Efficiency Best Practices in Shandong Province's Cement Industry

    E-Print Network [OSTI]

    Price, Lynn

    2013-01-01T23:59:59.000Z

    Azure. Alternative Fuel Use in the Cement Sector in ShandongSector Analysis Report: Cement Testing Sectoral ProposalTemplates In China’s Cement Sector. 2009. Bao , Xianfa.

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

    E-Print Network [OSTI]

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

    2010-01-01T23:59:59.000Z

    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.

  8. Identification of active agents for tetrachloroethylene degradation in Portland cement slurry containing ferrous iron

    E-Print Network [OSTI]

    Ko, Sae Bom

    2006-08-16T23:59:59.000Z

    -EDS) were used to identify minerals in chemical mixtures that have high activities. Results indicate that active agents for PCE degradation in Portland cement slurries and in cement extracts might be one of several AFm phases. However, systems without cement...

  9. Energy Efficiency Improvement Opportunities for the Cement Industry

    E-Print Network [OSTI]

    Worrell, Ernst

    2008-01-01T23:59:59.000Z

    Lime Institute. 2001. Energy Efficiency Opportunity Guide inIndustry, Office of Energy Efficiency, Natural Resourcesof a Cement Kiln, Energy Efficiency Demonstration Scheme,

  10. Innovative cement helps DOE safeguard nuclear facilities | Argonne...

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

    Innovative cement helps DOE safeguard nuclear facilities By Jared Sagoff * April 25, 2008 Tweet EmailPrint ARGONNE, Ill. - When Argonne materials scientists Arun Wagh and Dileep...

  11. Stabilizing coal-water mixtures with Portland cement

    DOE Patents [OSTI]

    Steinberg, M.; Krishna, C.R.

    1984-10-17T23:59:59.000Z

    Coal-water mixes stabilized by the addition of Portland cement which may additionally contain retarding carbohydrates, or borax are described. 1 tab.

  12. Asymptomatic Chronic Dislocation of a Cemented Total Hip Prosthesis

    E-Print Network [OSTI]

    Salvi, Andrea Emilio; Florschutz, Anthony Vatroslav; Grappiolo, Guido

    2014-01-01T23:59:59.000Z

    Dislocation of Hip Prosthesis dislocation after total hipa Cemented Total Hip Prosthesis * Mellino Mellini HospitalDislocation of a total hip prosthesis is a painful and

  13. Multifunctional Corrosion-resistant Foamed Well Cement Composites

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

    Multifunctional Corrosion-resistant Foamed Well Cement Composites Project Officer: Dan KingGreg Stillman Total budget: 300 K April 24 , 2013 Principal Investigator: Dr. Toshifumi...

  14. Energy Efficiency Improvement Opportunities for the Cement Industry

    E-Print Network [OSTI]

    Worrell, Ernst

    2008-01-01T23:59:59.000Z

    the small cement plants, earthen vertical kiln (and hollowcement plant in North China utilizing vertical shaft kilnscement has ordered a vertical roller mill for the new kiln

  15. Optimization Online - The carbon leakage effect on the cement ...

    E-Print Network [OSTI]

    Elisabetta Allevi

    2015-02-08T23:59:59.000Z

    Feb 8, 2015 ... The carbon leakage effect on the cement sector under different climate policies. Elisabetta Allevi(elisabetta.allevi ***at*** unibs.it)

  16. Stabilizing coal-water mixtures with portland cement

    DOE Patents [OSTI]

    Steinberg, Meyer (Melville, NY); Krishna, Coimbatore R. (Mount Sinai, NY)

    1986-01-01T23:59:59.000Z

    Coal-water mixes stabilized by the addition of portland cement which may additionally contain retarding carbohydrates, or borax are described.

  17. Energy Efficiency Improvement and Cost Saving Opportunities for Cement Making. An ENERGY STAR Guide for Energy and Plant Managers

    E-Print Network [OSTI]

    Worrell, Ernst

    2008-01-01T23:59:59.000Z

    Modern Vertical Shaft Kiln Technology” World Cement 1 26cement has ordered a vertical roller mill for the new kiln

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

    E-Print Network [OSTI]

    Hasanbeigi, Ali

    2013-01-01T23:59:59.000Z

    International Energy Agency (IEA). 2007. Tracking IndustrialInternational Energy Agency (IEA). 2009a. Cement TechnologyInternational Energy Agency (IEA). 2009b. Cement roadmap

  19. Analysis of Energy-Efficiency Opportunities for the Cement Industry in Shandong Province, China

    E-Print Network [OSTI]

    Price, Lynn

    2010-01-01T23:59:59.000Z

    UNFCCC), 2007 b. Energy efficiency measures at cementUNFCCC), 2007 c. Energy efficiency measures at cement2000. “Potentials for Energy Efficiency Improvement in the

  20. Low temperature quartz cementation of the Upper Cretaceous white sandstone of Lochaline, Argyll, Scotland.

    E-Print Network [OSTI]

    Haszeldine, Stuart

    which precipitate from these fluids. Predicting quartz cement distribution requires reconstruction distribution, and the origins of silica for cementation. A major uncertainty in predictive modelling of quartz

  1. antibiotic-loaded cement spacers: Topics by E-print Network

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

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 104 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  2. Analysis of Energy-Efficiency Opportunities for the Cement Industry in Shandong Province, China

    E-Print Network [OSTI]

    Price, Lynn

    2010-01-01T23:59:59.000Z

    and MAIN, 1993. Energy Technology in the Cement Industrialof Demonstrated Energy Technologies (CADDET), Internationaland MAIN. 1993. Energy Technology in the Cement Industrial

  3. Economic Development Bond Program (Iowa)

    Broader source: Energy.gov [DOE]

    Through its Economic Development Bond Program, the Iowa Finance Authority (IFA) issues tax-exempt bonds on behalf of private entities or organizations for eligible purposes. The responsibility for...

  4. Private Activity Bond Allocation (Missouri)

    Broader source: Energy.gov [DOE]

    The Private Activity Bond Allocation Program provides low-interest financing through tax-exempt bonds for certain types of projects, including electric and gas utility projects. Eligible applicants...

  5. Guidebook for Using the Tool BEST Cement: Benchmarking and Energy Savings Tool for the Cement Industry

    SciTech Connect (OSTI)

    Galitsky, Christina; Price, Lynn; Zhou, Nan; Fuqiu , Zhou; Huawen, Xiong; Xuemin, Zeng; Lan, Wang

    2008-07-30T23:59:59.000Z

    The Benchmarking and Energy Savings Tool (BEST) Cement is a process-based tool based on commercially available efficiency technologies used anywhere in the world applicable to the cement industry. This version has been designed for use in China. No actual cement facility with every single efficiency measure included in the benchmark will likely exist; however, the benchmark sets a reasonable standard by which to compare for plants striving to be the best. The energy consumption of the benchmark facility differs due to differences in processing at a given cement facility. The tool accounts for most of these variables and allows the user to adapt the model to operational variables specific for his/her cement facility. Figure 1 shows the boundaries included in a plant modeled by BEST Cement. In order to model the benchmark, i.e., the most energy efficient cement facility, so that it represents a facility similar to the user's cement facility, the user is first required to input production variables in the input sheet (see Section 6 for more information on how to input variables). These variables allow the tool to estimate a benchmark facility that is similar to the user's cement plant, giving a better picture of the potential for that particular facility, rather than benchmarking against a generic one. The input variables required include the following: (1) the amount of raw materials used in tonnes per year (limestone, gypsum, clay minerals, iron ore, blast furnace slag, fly ash, slag from other industries, natural pozzolans, limestone powder (used post-clinker stage), municipal wastes and others); the amount of raw materials that are preblended (prehomogenized and proportioned) and crushed (in tonnes per year); (2) the amount of additives that are dried and ground (in tonnes per year); (3) the production of clinker (in tonnes per year) from each kiln by kiln type; (4) the amount of raw materials, coal and clinker that is ground by mill type (in tonnes per year); (5) the amount of production of cement by type and grade (in tonnes per year); (6) the electricity generated onsite; and, (7) the energy used by fuel type; and, the amount (in RMB per year) spent on energy. The tool offers the user the opportunity to do a quick assessment or a more detailed assessment--this choice will determine the level of detail of the energy input. The detailed assessment will require energy data for each stage of production while the quick assessment will require only total energy used at the entire facility (see Section 6 for more details on quick versus detailed assessments). The benchmarking tool provides two benchmarks--one for Chinese best practices and one for international best practices. Section 2 describes the differences between these two and how each benchmark was calculated. The tool also asks for a target input by the user for the user to set goals for the facility.

  6. Composition and application of novel sprayable phosphate cement (grancrete) that bonds to styrofoam

    DOE Patents [OSTI]

    Wagh, Arun S.; Paul, Jr., James W.

    2007-01-09T23:59:59.000Z

    A dry mix particulate composition of a calcined oxide of Mg and/or Ca, an acid phosphate, and fly ash or equivalent, wherein the calcined oxide is present in the range of from about 17% to about 40% by weight and the acid phosphate is present in the range of from about 29% to about 52% by weight and the fly ash or equivalent is present in the range of from about 24% to about 39% by weight when sand is added to the dry mix, it is present in the range of from about 39% to about 61% by weight of the combined dry mix and sand. A method of forming a structural member is also disclosed wherein an aqueous slurry of about 8 12 pounds of water is added to dry mix and sand.

  7. Investigation of the bond and tensile capacity of synthetic lightweight aggregates embedded in a cement matrix 

    E-Print Network [OSTI]

    Nichols, Gisela Wagner

    1969-01-01T23:59:59.000Z

    failure, surfaoe measurements would not be necessary. 18 Table lt Aggregate Classification Roughness Coating Cleanliness Shape R-3 smooth ooated o lean S-3 SAP-3 smooth coated clean S-2 R 10B medium ooated d. irty G-3 rough uncoated dirty S-2 R... 10A smooth coated dirty S-2 R 8A S-2 R 8A medium assorted ooated ooated dirty dirty S-2 R 2b rough ooated dirty Table 2e Aggregate Properties S-2 R 10A S-2 R 10B S-2 R 8A S-2 E 2b S-3 SAP3 0-3 coaaerci el JlkN fired AkN fired AAN fired...

  8. Investigation of the bond and tensile capacity of synthetic lightweight aggregates embedded in a cement matrix

    E-Print Network [OSTI]

    Nichols, Gisela Wagner

    1969-01-01T23:59:59.000Z

    aggregates. A disoussion of the design and oonstruotion of the equipmsnt of the testing method is presented~ iv ABSTRACT CONTINUED Eight batohes of differently shaped pieces of seven types of lightweight aggregates were tested and are evaluated.... . Almost all of the aggregate pieces failed in tension. The approximate tensile strengths are caloulated and compared to the dry unit weights and bulk specific gravities of the various aggregates. Three conolusions are presented and six recommendations...

  9. CEMENT/CLAY INTERACTIONS A REVIEW: EXPERIMENTS, NATURALANALOGUES, AND MODELING.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 CEMENT/CLAY INTERACTIONS ­ A REVIEW: EXPERIMENTS, NATURALANALOGUES, AND MODELING. Eric C. Gaucher that will be in contact with the clay material of the engineered barriers as well as with the geological formation. France, Switzerland and Belgium are studying the option of clayey geological formations. The clay and cement media

  10. IMPACT BEHAVIOR OF FABRIC-CEMENT BASED COMPOSITES Efrat BUTNARIUa

    E-Print Network [OSTI]

    Mobasher, Barzin

    for the pultruded composites made from PE knitted fabrics. Keywords Impact, fabric, cement composite, textile, fiberIMPACT BEHAVIOR OF FABRIC-CEMENT BASED COMPOSITES Efrat BUTNARIUa , Alva PELEDb , and Barzin Engineering Department, Ben Gurion University, Beer Sheva Israel, c Civil and Environmental Engineering

  11. Cement (2010 MECS) | Department of Energy

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

    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 DataDepartment of Energy Your Density Isn't Your Destiny: Theof EnergyAdministration-Desert SouthwestofDepartmentCellulosicCement (2010

  12. Gujarat Ambuja Cements Limited | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetec AG| Open Energy InformationGettopGuilford, Maine:Ambuja Cements

  13. MECS 2006 - Cement | Department of Energy

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

    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 DataDepartment of Energy Your Density Isn't YourTransport(FactDepartment ofLetterEconomy andTermsDepartment1| DepartmentCement MECS 2006 -

  14. Lifecycle Analyses of Biofuels

    E-Print Network [OSTI]

    Delucchi, Mark

    2006-01-01T23:59:59.000Z

    08 Lifecycle Analyses of Biofuels Draft Report (May be citedLIFECYCLE ANALYSES OF BIOFUELS Draft manuscript (may belifecycle analysis (LCA) of biofuels for transportation has

  15. Magnesium-phosphate-glass cements with ceramic-type properties

    DOE Patents [OSTI]

    Sugama, T.; Kukacka, L.E.

    1982-09-23T23:59:59.000Z

    Rapid setting magnesium phosphate (Mg glass) cementitious materials consisting of magnesium phosphate cement paste, polyborax and water-saturated aggregate, exhibits rapid setting and high early strength characteristics. The magnesium glass cement is prepared from a cation-leachable powder and a bivalent metallic ion-accepting liquid such as an aqueous solution of diammonium phosphate and ammonium polyphosphate. The cation-leachable powder includes a mixture of two different magnesium oxide powders processed and sized differently which when mixed with the bivalent metallic ion-accepting liquid provides the magnesium glass cement consisting primarily of magnesium ortho phosphate tetrahydrate, with magnesium hydroxide and magnesium ammonium phosphate hexahydrate also present. The polyborax serves as a set-retarder. The resulting magnesium mono- and polyphosphate cements are particularly suitable for use as a cementing matrix in rapid repair systems for deteriorated concrete structures as well as construction materials and surface coatings for fireproof structures.

  16. Magnesium phosphate glass cements with ceramic-type properties

    DOE Patents [OSTI]

    Sugama, Toshifumi (Mastic Beach, NY); Kukacka, Lawrence E. (Port Jefferson, NY)

    1984-03-13T23:59:59.000Z

    Rapid setting magnesium phosphate (Mg glass) cementitious materials consisting of magnesium phosphate cement paste, polyborax and water-saturated aggregate exhibiting rapid setting and high early strength characteristics. The magnesium glass cement is prepared from a cation-leachable powder and a bivalent metallic ion-accepting liquid such as an aqueous solution of diammonium phosphate and ammonium polyphosphate. The cation-leachable powder includes a mixture of two different magnesium oxide powders processed and sized differently which when mixed with the bivalent metallic ion-accepting liquid provides the magnesium glass cement consisting primarily of magnesium ortho phosphate tetrahydrate, with magnesium hydroxide and magnesium ammonium phosphate hexahydrate also present. The polyborax serves as a set-retarder. The resulting magnesium mono- and polyphosphate cements are particularly suitable for use as a cementing matrix in rapid repair systems for deteriorated concrete structures as well as construction materials and surface coatings for fireproof structures.

  17. Ghabezloo et al.: Poromechanical behaviour of hardened cement paste under isotropic loading Poromechanical behaviour of hardened cement paste

    E-Print Network [OSTI]

    Boyer, Edmond

    of this cement in oil-wells conditions, i.e. under high stress and elevated temperature, is essential of the well when CO2 storage and sequestration is planned. Whether the mechanical behaviour of hardened cement and drained bulk modulus are discussed. A phenomenon of degradation of elastic properties is observed

  18. Pauling bond strength, bond length and electron density distribution

    SciTech Connect (OSTI)

    Gibbs, Gerald V.; Ross, Nancy L.; Cox, David F.; Rosso, Kevin M.; Iversen, Bo B.; Spackman, M. A.

    2014-01-18T23:59:59.000Z

    A power law regression equation, = 1.46(/r)-0.19, connecting the average experimental bond lengths, , with the average accumulation of the electron density at the bond critical point, , between bonded metal M and oxygen atoms, determined at ambient conditions for oxide crystals, where r is the row number of the M atom, is similar to the regression equation R(M-O) = 1.39(?(rc)/r)-0.21 determined for three perovskite crystals for pressures as high as 80 GPa. The two equations are also comparable with those, = 1.43(/r)-0.21, determined for a large number of oxide crystals at ambient conditions and = 1.39(/r)-0.22, determined for geometry optimized hydroxyacid molecules, that connect the bond lengths to the average Pauling electrostatic bond strength, , for the M-O bonded interactions. On the basis of the correspondence between the two sets of equations connecting ?(rc) and the Pauling bond strength s with bond length, it appears that Pauling’s simple definition of bond strength closely mimics the accumulation of the electron density between bonded pairs of atoms. The similarity of the expressions for the crystals and molecules is compelling evidence that the M-O bonded interactions for the crystals and molecules 2 containing the same bonded interactions are comparable. Similar expressions, connecting bond lengths and bond strength, have also been found to hold for fluoride, nitride and sulfide molecules and crystals. The Brown-Shannon bond valence, ?, power law expression ? = [R1/(R(M-O)]N that has found wide use in crystal chemistry, is shown to be connected to a more universal expression determined for oxides and the perovskites, = r[(1.41)/]4.76, demonstrating that the bond valence for a bonded interaction is likewise closely connected to the accumulation of the electron density between the bonded atoms. Unlike the Brown-Shannon expression, it is universal in that it holds for the M-O bonded interactions for a relatively wide range of M atoms of the periodic table. The power law equation determined for the oxide crystals at ambient conditions is similar to the power law expression = r[1.46/]5.26 determined for the perovskites at pressures as high as 80 GPa, indicating that the intrinsic connection between R(M-O) and ?(rc) that holds at ambient conditions also holds, to a first approximation, at high pressures.

  19. Calcium phosphate cement augmentation of cancellous bone screws can compensate for the absence of cortical fixation

    E-Print Network [OSTI]

    Guerraoui, Rachid

    Calcium phosphate cement augmentation of cancellous bone screws can compensate for the absence Keywords: Screw fixation Pullout force Calcium phosphate cement Osteoporotic bone a b s t r a c with cement. Previous studies have shown that bone augmentation with Calcium Phosphate (CaP) cement

  20. SEPTARIAN CONCRETIONS Septarian structures are former cracks, often lled with cement

    E-Print Network [OSTI]

    S SEPTARIAN CONCRETIONS Septarian structures are former cracks, often ®lled with cement may show a component of shear displacement. Crack filling cements Cracks may range from largely un®lled to fully cement ®lled, often with a variety of distinctively colored spar cements. The ®lls may also

  1. The Impact of Mathematical Modeling on the Production of Special Purpose Cement

    E-Print Network [OSTI]

    Vuik, Kees

    The Impact of Mathematical Modeling on the Production of Special Purpose Cement Domenico Lahaye in the production industry? Our partnership with Almatis B.V., a special purpose cement manufacturer, resulted with experts in various engineering disciplines. Production of Special Purpose Cement Commonly used cement

  2. [ ]March 2013 The Louisiana Department ofTransportation and Development (DOTD) has been using cement

    E-Print Network [OSTI]

    Harms, Kyle E.

    using cement stabilized base course (soil cement) in flexible pavement construction for more than 50 on the cement stabilized base shortly after the base construction. The micro-cracks will help relieve the contracting stress of the cement stabilized layer during its drying process, thus preventing it from forming

  3. Influence of Curing Conditions on Water Loss and Hydration in Cement

    E-Print Network [OSTI]

    Bentz, Dale P.

    Influence of Curing Conditions on Water Loss and Hydration in Cement Pastes with and without Fly Loss and Hydration in Cement Pastes with and without Fly Ash Substitution Dale P. Bentz Building at different rates from portland cement, blended cements may require that special attention be paid

  4. Guang Ye, Characterization of cement paste at early age, 1 of 11 Fax: +31 15 2785895

    E-Print Network [OSTI]

    Guang Ye, Characterization of cement paste at early age, 1 of 11 Fax: +31 15 2785895 E-mail: ye.guang@ct.tudelft.nl A MICROMECHANIC MODEL FOR CHARACTERIZATION OF CEMENT PASTE AT EARLY AGE VALIDATED WITH EXPERIMENTS Guang Ye Delft of a cement-based material, i.e. the stiffness of cement paste, is the result of the continuous change

  5. CAPACITY INVESTMENT UNDER DEMAND UNCERTAINTY: THE ROLE OF IMPORTS IN THE U.S. CEMENT INDUSTRY

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    CAPACITY INVESTMENT UNDER DEMAND UNCERTAINTY: THE ROLE OF IMPORTS IN THE U.S. CEMENT INDUSTRY Guy in the U.S. Cement Industry. Guy Meunier INRA & Ecole Polytechnique Jean-Pierre Ponssard CNRS & Ecole. This relationship is tested with data on the U.S. cement industry, where, because cement is costly to transport over

  6. Energy, environmental and greenhouse gas effects of using alternative fuels in cement production

    E-Print Network [OSTI]

    Columbia University

    1 Energy, environmental and greenhouse gas effects of using alternative fuels in cement to an increase of AF use from 8.7% to 20.9% of the total energy consumption. 2. One of the alternative fuels used cement industry produces about 3.3 billion tonnes of cement annually. Cement production is energy

  7. Time-dependent behaviour of hardened cement paste under isotropic loading

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    of hardened cement paste under isotropic loading, Cement and Concrete Research, doi: 10.1016/j.cemconres.2012.03.002 hal-00689716,version1-19Apr2012 Author manuscript, published in "Cement and Concrete Research (2012 the framework of the classical theory of porous media. The effects of water-to-cement ratio and chemical

  8. The FGM Concept in the Development of Fiber Cement Components

    SciTech Connect (OSTI)

    Dias, C. M. R.; John, V. M. [Department of Construction Engineering, Polytechnic School, University of Sao Paulo, 05508 900 Sao Paulo, SP (Brazil); Savastano, H. Jr. [Faculty of Animal Science and Food Engineering, University of Sao Paulo, Av. Duque de Caxias Norte 225, P.O. Box 23, 13635-900 Pirassununga, SP (Brazil)

    2008-02-15T23:59:59.000Z

    The FGM concept appears promising in improving the mechanical performance and reducing production costs of fiber cement building components. However, it has not yet been broadly applied to fiber cement technology. In this study we analyze the functionally graded fiber cement concept and its potential for industrial application in Hatschek machines. The conventional Hatschek process is summarized as well as the proposed modifications to allow FGM fiber cement production. The feasibility of producing functionally graded fiber cement by grading PVA fiber content was experimentally evaluated. Thermogravimetric (TG) and Scanning Electron Microscope (SEM) analysis were used to evaluate fiber distribution profiles. Four-point bending tests were applied to evaluate the mechanical performance of both conventional and functionally graded composites. The results shows that grading PVA fiber content is an effective way to produce functionally graded fiber cement, allowing the reduction of the total fiber volume without significant reduction on composite MOR. TG tests were found adequate to assess fiber content at different positions in functionally graded fiber cements.

  9. Trending: Metal Oxo Bonds

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del SolStrengthening a solidSynthesisAppliancesTrending: Metal Oxo Bonds Print Metal

  10. Trending: Metal Oxo Bonds

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del SolStrengthening a solidSynthesisAppliancesTrending: Metal Oxo Bonds Print

  11. Energy Efficiency Improvement Opportunities for the Cement Industry

    SciTech Connect (OSTI)

    Price, Lynn; Worrell, Ernst; Galitsky, Christina; Price, Lynn

    2008-01-31T23:59:59.000Z

    This report provides information on the energy savings, costs, and carbon dioxide emissions reductions associated with implementation of a number of technologies and measures applicable to the cement industry. The technologies and measures include both state-of-the-art measures that are currently in use in cement enterprises worldwide as well as advanced measures that are either only in limited use or are near commercialization. This report focuses mainly on retrofit measures using commercially available technologies, but many of these technologies are applicable for new plants as well. Where possible, for each technology or measure, costs and energy savings per tonne of cement produced are estimated and then carbon dioxide emissions reductions are calculated based on the fuels used at the process step to which the technology or measure is applied. The analysis of cement kiln energy-efficiency opportunities is divided into technologies and measures that are applicable to the different stages of production and various kiln types used in China: raw materials (and fuel) preparation; clinker making (applicable to all kilns, rotary kilns only, vertical shaft kilns only); and finish grinding; as well as plant wide measures and product and feedstock changes that will reduce energy consumption for clinker making. Table 1 lists all measures in this report by process to which they apply, including plant wide measures and product or feedstock changes. Tables 2 through 8 provide the following information for each technology: fuel and electricity savings per tonne of cement; annual operating and capital costs per tonne of cement or estimated payback period; and, carbon dioxide emissions reductions for each measure applied to the production of cement. This information was originally collected for a report on the U.S. cement industry (Worrell and Galitsky, 2004) and a report on opportunities for China's cement kilns (Price and Galitsky, in press). The information provided in this report is based on publicly-available reports, journal articles, and case studies from applications of technologies around the world.

  12. Solder extrusion pressure bonding process and bonded products produced thereby

    DOE Patents [OSTI]

    Beavis, Leonard C. (Albuquerque, NM); Karnowsky, Maurice M. (Albuquerque, NM); Yost, Frederick G. (Ceder Crest, NM)

    1992-01-01T23:59:59.000Z

    Production of soldered joints which are highly reliable and capable of surviving 10,000 thermal cycles between about -40.degree. C. and 110.degree. C. Process involves interposing a thin layer of a metal solder composition between the metal surfaces of members to be bonded and applying heat and up to about 1000 psi compression pressure to the superposed members, in the presence of a reducing atmosphere, to extrude the major amount of the solder composition, contaminants including fluxing gases and air, from between the members being bonded, to form a very thin, strong intermetallic bonding layer having a thermal expansion tolerant with that of the bonded members.

  13. Solder extrusion pressure bonding process and bonded products produced thereby

    DOE Patents [OSTI]

    Beavis, L.C.; Karnowsky, M.M.; Yost, F.G.

    1992-06-16T23:59:59.000Z

    Disclosed is a process for production of soldered joints which are highly reliable and capable of surviving 10,000 thermal cycles between about [minus]40 C and 110 C. Process involves interposing a thin layer of a metal solder composition between the metal surfaces of members to be bonded and applying heat and up to about 1000 psi compression pressure to the superposed members, in the presence of a reducing atmosphere, to extrude the major amount of the solder composition, contaminants including fluxing gases and air, from between the members being bonded, to form a very thin, strong intermetallic bonding layer having a thermal expansion tolerant with that of the bonded members.

  14. Use of Finite-element Analysis to Improve Well Cementing in HTHP Conditions

    E-Print Network [OSTI]

    Arias, Henry

    2013-07-30T23:59:59.000Z

    stresses of San Antonio cement (left) and PEEQ of cement San Antonio and Barco formation (right) after hydraulic fracturing ........ 103 Figure 5.1 UCS (top left), Young?s modulus (top right), and Poisson?s ratio (bottom) for Halliburton Portland... cements ............................................... 110 Figure 5.2 Tensile strength for Halliburton Portland cements ................................... 111 Figure 5.3 Stress strain-curve and photo of uniaxial test for Halliburton Portland cement...

  15. International Best Practices for Pre-Processing and Co-Processing Municipal Solid Waste and Sewage Sludge in the Cement Industry

    E-Print Network [OSTI]

    Hasanbeigi, Ali

    2013-01-01T23:59:59.000Z

    Asia Pacific Partnership Cement Task Force (APP). 2010.07(3) Utilizing Biosolids in Cement Kilns. (November). Asia-Utilising Biosolids in Cement Kilns. Final Report. Available

  16. International Best Practices for Pre-Processing and Co-Processing Municipal Solid Waste and Sewage Sludge in the Cement Industry

    E-Print Network [OSTI]

    Hasanbeigi, Ali

    2013-01-01T23:59:59.000Z

    07-07(3) Utilizing Biosolids in Cement Kilns. (November).APP). 2011. Utilising Biosolids in Cement Kilns. FinalFederation. No date. Biosolids in cement production.

  17. Investigation of bonding strength and sealing behavior of aluminum/stainless steel bonded at room temperature

    E-Print Network [OSTI]

    Howlader, Matiar R

    ], spark welding [3], explosive bonding [4], and diffusion bonding [5,6]. However, the processing such as diffusion bonding [5,6], friction welding [7e11], vacuum roll bonding [12] and hot roll bonding [13Investigation of bonding strength and sealing behavior of aluminum/stainless steel bonded at room

  18. Qualified Energy Conservation Bonds (Ohio)

    Broader source: Energy.gov [DOE]

    The Ohio Air Quality Development Authority (OAQDA) administers the Qualified Energy Conservation Bonds (QECB) program in Ohio. QECBs have been used by local governments and public universities to...

  19. Characterization and modeling of the cemented sediment surrounding...

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

    cement phase is likely the reaction between the glass and the sea water to from a Mg-silicate, here modeled as sepiolite. Citation: Strachan DM, JV Crum, JV Ryan, and A...

  20. Climate VISION: Private Sector Initiatives: Cement: Work Plans

    Office of Scientific and Technical Information (OSTI)

    Work Plans The Portland Cement Association (PCA) has lead the industry effort to produce a Work Plan in collaboration with the EPA and DOE. The Plan includes an outline of the...

  1. ash cement matrixes: Topics by E-print Network

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

    11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 201 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  2. Nanostructure and Nanomechanics of Cement: Polydisperse Colloidal Packing

    E-Print Network [OSTI]

    Masoero, Enrico

    Cement setting and cohesion are governed by the precipitation and growth of calcium-silicate-hydrate, through a complex evolution of microstructure. A colloidal model to describe nucleation, packing, and rigidity of ...

  3. Quantum Mechanical Metric for Internal Cohesion in Cement Crystals

    E-Print Network [OSTI]

    Dharmawardhana, C. C.; Misra, Anil; Ching, Wai-Yim

    2014-12-05T23:59:59.000Z

    Calcium silicate hydrate (CSH) is the main binding phase of Portland cement, the single most important structural material in use worldwide. Due to the complex structure and chemistry of CSH at various length scales, the focus has progressively...

  4. Development of an OCS Cementing Operational Guidelines Database

    E-Print Network [OSTI]

    Bell, Matthew G.

    2014-08-20T23:59:59.000Z

    This paper describes a relational database system developed for the Bureau of Safety and Environmental Enforcement as part of an analysis of current cementing procedures employed in the US outer continental shelf. Initial work included defining...

  5. Geochemical and geomechanical effects on wellbore cement fractures

    SciTech Connect (OSTI)

    Um, Wooyong; Jung, Hun Bok; Kabilan, Senthil; Fernandez, Carlos A.; Brown, Christopher F.

    2014-01-01T23:59:59.000Z

    Experimental studies were conducted using batch reactors, X-ray microtomograpy (XMT), and computational fluid dynamics (CFD) simulation to determine changes in cement fracture surfaces, fluid flow pathways, and permeability with geochemical and geomechanical processes. Composite Portland cement-basalt caprock core with artificial fractures was prepared and reacted with CO2-saturated groundwater at 50°C and 10 MPa for 3 to 3.5 months under static conditions to understand the geochemical and geomechanical effects on the integrity of wellbores containing defects. Cement-basalt interface samples were subjected to mechanical stress at 2.7 MPa before the CO2 reaction. XMT provided three-dimensional (3-D) visualization of the opening and interconnection of cement fractures due to mechanical stress. After the CO2 reaction, XMT images revealed that calcium carbonate precipitation occurred extensively within the fractures in the cement matrix, but only partially along fractures located at the cement-basalt interface. The permeability calculated based on CFD simulation was in agreement with the experimentally measured permeability. The experimental results imply that the wellbore cement with fractures is likely to be healed during exposure to CO2-saturated groundwater under static conditions, whereas fractures along the cement-caprock interface are still likely to remain vulnerable to the leakage of CO2. CFD simulation for the flow of different fluids (CO2-saturated brine and supercritical CO2) using a pressure difference of 20 kPa and 200 kPa along ~2 cm-long cement fractures showed that a pressure gradient increase resulted in an increase of CO2 fluids flux by a factor of only ~3-9 because the friction of CO2 fluids on cement fracture surfaces increased with higher flow rate as well. At the same pressure gradient, the simulated flow rate was higher for supercritical CO2 than CO2-saturated brine by a factor of only ~2-3, because the viscosity of supercritical CO2 is much lower than that of CO2-saturated brine. The study suggests that in deep geological reservoirs the geochemical and geomechanical processes have coupled effects on the wellbore cement fracture evolution and fluid flow along the fracture surfaces.

  6. Extension and replacement of aspalt cement with sulphur

    E-Print Network [OSTI]

    Pickett, Daniel Ernest

    1977-01-01T23:59:59.000Z

    supply of sulphur, it would be advantageous to reduce the dependence of the paving industry upon asphalt cement while utilizing effectively the readily available sulphur. An investigation was made of the use of elemental sulphur as a partial... purpose: an outlet would be pro- vided for the current oversupply of sulphur, and the dependence of the paving industry upon the use of asphalt cement would be reduced. Another potential benefit is the possibility of improved performance of pavements...

  7. History and some potentials of oil shale cement

    SciTech Connect (OSTI)

    Knutson, C.F.; Smith, R.P.; Russell, B.F. (Idaho National Engineering Lab., Idaho Falls, ID (USA))

    1989-01-01T23:59:59.000Z

    The utilization of oil shale as a cement component is discussed. It was investigated in America and Europe during World War I. Additional development occurred in Western Europe, Russia, and China during the 1920s and 1930s. World War II provided further development incentives and a relatively mature technology was in place in Germany, Russia, and China prior to 1980. The utilization of oil shale in cement has taken a number of different paths. One approach has been to utilize the energy in the oil shale as the principal source for the cement plant and to use the combusted shale as a minor constituent of the plant's cement product. A second approach has been to use the combusted shale as a class C or cementitious fly-ash component in portland cement concrete. Other approaches utilizing eastern oil shale have been to use the combusted oil shale with additives as a specialty cement, or to cocombust the oil shale with coal and utilize the sulfur-rich combustion product.

  8. Quantum Confinement in Hydrogen Bond

    E-Print Network [OSTI]

    Santos, Carlos da Silva dos; Ricotta, Regina Maria

    2015-01-01T23:59:59.000Z

    In this work, the quantum confinement effect is proposed as the cause of the displacement of the vibrational spectrum of molecular groups that involve hydrogen bonds. In this approach the hydrogen bond imposes a space barrier to hydrogen and constrains its oscillatory motion. We studied the vibrational transitions through the Morse potential, for the NH and OH molecular groups inside macromolecules in situation of confinement (when hydrogen bonding is formed) and non-confinement (when there is no hydrogen bonding). The energies were obtained through the variational method with the trial wave functions obtained from Supersymmetric Quantum Mechanics (SQM) formalism. The results indicate that it is possible to distinguish the emission peaks related to the existence of the hydrogen bonds. These analytical results were satisfactorily compared with experimental results obtained from infrared spectroscopy.

  9. Expansion-contraction cycles for cement optimized as a function of additives

    SciTech Connect (OSTI)

    Talabani, S.; Hareland, G. [New Mexico Inst. of Mining and Technology, Socorro, NM (United States)

    1995-12-31T23:59:59.000Z

    An experimental study was carried out to investigate the addition of specific additives to cement in order to eliminate the micro-fractures and micro-annuli that cause gas migration. The experiments performed monitored the change in the cement slurry pressure during the setting of the cement. During the setting period of the cement, two time cycles of cement expansion and contraction were observed. This is due to the individual contributions of each part of the cement mixture. To obtain the optimum tightness of the cement, final optimum concentrations of the additives were obtained experimentally, where the cyclic pressure behavior of the cement was optimized for the best final cement results. By utilizing the correct amount of Anchorage Clay, XC-Polymer, Ironite Scavenger, Ultrafine cement and Synthetic Rubber powder in a class G mixture at a given temperature and confining pressure, an impermeable cement mixture can be obtained. The correct amount of Synthetic Rubber used for cyclic pressure reduction is a function of cement setting temperature and pressure as well as the elastic properties of the rubber. By using laboratory testing at different pressure and temperature with different rubber concentrations and elastic properties, it is estimated that the entire annulus can have an impermeable cement from surface to total depth. The difference in temperature and pressure with depth dictates the concentration and elastic properties of the rubber as the required expansion and contraction changes with depth.

  10. Method for vacuum fusion bonding

    DOE Patents [OSTI]

    Ackler, Harold D. (Sunnyvale, CA); Swierkowski, Stefan P. (Livermore, CA); Tarte, Lisa A. (Livermore, CA); Hicks, Randall K. (Stockton, CA)

    2001-01-01T23:59:59.000Z

    An improved vacuum fusion bonding structure and process for aligned bonding of large area glass plates, patterned with microchannels and access holes and slots, for elevated glass fusion temperatures. Vacuum pumpout of all components is through the bottom platform which yields an untouched, defect free top surface which greatly improves optical access through this smooth surface. Also, a completely non-adherent interlayer, such as graphite, with alignment and location features is located between the main steel platform and the glass plate pair, which makes large improvements in quality, yield, and ease of use, and enables aligned bonding of very large glass structures.

  11. Fusion bonding and alignment fixture

    DOE Patents [OSTI]

    Ackler, Harold D. (Sunnyvale, CA); Swierkowski, Stefan P. (Livermore, CA); Tarte, Lisa A. (Livermore, CA); Hicks, Randall K. (Stockton, CA)

    2000-01-01T23:59:59.000Z

    An improved vacuum fusion bonding structure and process for aligned bonding of large area glass plates, patterned with microchannels and access holes and slots, for elevated glass fusion temperatures. Vacuum pumpout of all the components is through the bottom platform which yields an untouched, defect free top surface which greatly improves optical access through this smooth surface. Also, a completely non-adherent interlayer, such as graphite, with alignment and location features is located between the main steel platform and the glass plate pair, which makes large improvements in quality, yield, and ease of use, and enables aligned bonding of very large glass structures.

  12. Evaluation of water resources for enhanced oil recovery operations, Cement Field, Caddo and Grady Counties, Oklahoma

    SciTech Connect (OSTI)

    Preston, D.A.; Harrison, W.E.; Luza, K.V.; Prater, L.; Reddy, R.J.

    1982-02-01T23:59:59.000Z

    This report is based on the results of an investigation of the water resources local to the Cement Oil Field in Caddo and Grady Counties, southwestern, Oklahoma. The intent of the report is to present at least a semi-quantitative estimate of the volume, deliverability, and chemistry of the water potentially available for enhanced oil recovery in one or more Oklahoma oil fields. Subsequent to a review of several oil fields, the Cement Field was chosen for study because of its large size (25,000 acres), its extensive subsurface control (over 1850 wells), and its long history of production (since 1952) from several producing formations, some of which are already undergoing extensive waterflood operations. A preliminary review of the available data for this study suggested a threefold categorization of water resources, since the data for each category are distinctly different in nature, and, to some extent, different in source. The three categories are: surface water, ground water, and subsurface water. Flow, volume, and chemical analyses of each source are estimated.

  13. Method of bonding

    DOE Patents [OSTI]

    Saller, deceased, Henry A. (late of Columbus, OH); Hodge, Edwin S. (Columbus, OH); Paprocki, Stanley J. (Columbus, OH); Dayton, Russell W. (Columbus, OH)

    1987-12-01T23:59:59.000Z

    1. A method of making a fuel-containing structure for nuclear reactors, comprising providing an assembly comprising a plurality of fuel units; each fuel unit consisting of a core plate containing thermal-neutron-fissionable material, sheets of cladding metal on its bottom and top surfaces, said cladding sheets being of greater width and length than said core plates whereby recesses are formed at the ends and sides of said core plate, and end pieces and first side pieces of cladding metal of the same thickness as the core plate positioned in said recesses, the assembly further comprising a plurality of second side pieces of cladding metal engaging the cladding sheets so as to space the fuel units from one another, and a plurality of filler plates of an acid-dissolvable nonresilient material whose melting point is above 2000.degree. F., each filler plate being arranged between a pair of said second side pieces and the cladding plates of two adjacent fuel units, the filler plates having the same thickness as the second side pieces; the method further comprising enclosing the entire assembly in an envelope; evacuating the interior of the entire assembly through said envelope; applying inert gas under a pressure of about 10,000 psi to the outside of said envelope while at the same time heating the assembly to a temperature above the flow point of the cladding metal but below the melting point of any material of the assembly, whereby the envelope is pressed against the assembly and integral bonds are formed between plates, sheets, first side pieces, and end pieces and between the sheets and the second side pieces; slowly cooling the assembly to room temperature; removing the envelope; and dissolving the filler plates without attacking the cladding metal.

  14. Low Temperature Material Bonding Techniq Ue

    DOE Patents [OSTI]

    Ramsey, J. Michael (Knoxville, TN); Foote, Robert S. (Oak Ridge, TN)

    2002-08-06T23:59:59.000Z

    A method of performing a lower temperature bonding technique to bond together two mating pieces of glass includes applying a sodium silicate aqueous solution between the two pieces.

  15. Local Option- Industrial Facilities and Development Bonds

    Broader source: Energy.gov [DOE]

    Under the Utah Industrial Facilities and Development Act, counties, municipalities, and state universities in Utah may issue Industrial Revenue Bonds (IRBs) or Industrial Development Bonds (IDBs)...

  16. The use of scrap tires in rotary cement kilns

    SciTech Connect (OSTI)

    Blumenthal, M. [Scrap Tire Management Council, Washington, DC (United States)

    1996-12-31T23:59:59.000Z

    The use of scrap tires as a supplemental fuel in the United States Portland cement industry has increased significantly in the past six years. In 1990, there were two kilns using tire-derived fuel (TDF), today 30 kilns use TDF. The outlook for continued and expanded use of TDF in the U.S. cement industry should be considered favorable, with 15 kilns conducting tests to determine TDF`s applicability or in the permitting process. The Council`s estimates are that by the end of 1996, the cement industry could be consuming some 75-100 million of the 253 million annually generated scrap tires in the United States. This level of TDF usage will make the cement industry the largest market segments for scrap tires in the United States. While the long-term outlook is at present positive, there are a series of factors that have, and will likely continue to adversely impact the near-term usage of TDF. These issues, as well as the factors that are likely to positively impact the cement kiln TDF market are the subject of this presentation.

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

    E-Print Network [OSTI]

    Hasanbeigi, Ali

    2013-01-01T23:59:59.000Z

    24 3.5. Emerging Carbon Capture Technologies for the CementGmbH (ECRA), 2007. Carbon Capture Technology - Options andEmerging carbon capture technologies for the cement industry

  18. Nano-ChemoMechanical assessment of Rice Husk Ash cement by wavelength dispersive spectroscopy and nanoindentation

    E-Print Network [OSTI]

    Abuhaikal, Muhannad (Muhannad A. R.)

    2011-01-01T23:59:59.000Z

    Cement global production stands at 3 Giga tons making concrete the most consumed structural mateial worldwide. This massively produced material comes with a heavy environmental footprint rendering the cement industry ...

  19. NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration

    E-Print Network [OSTI]

    Bentz, Dale P.

    NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration and Microstructure Development Modeling Package. Version 3.0 Dale P. Bentz #12;NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration

  20. Unprocessed rice husk ash as a partial replacement of cement for low-cost concrete

    E-Print Network [OSTI]

    Brown, Dorothy Kamilah

    2012-01-01T23:59:59.000Z

    Cement is a very valuable commodity as it can be used to construct structurally sound buildings and infrastructure. However, in many developing countries cement is expensive due to the unavailability of local resources to ...

  1. Dispersion of Short Fibers in Cement D. D. L. Chung1

    E-Print Network [OSTI]

    Chung, Deborah D.L.

    the strain, damage, or temperature , self-heating for de- icing , and electromagnetic reflection microfibers in cement, as assessed by electrical resistivity measurement for the case of electrically; Portland cements; Mortars; Electrical resistivity. Introduction Short fibers are used as admixtures

  2. Potential Energy Savings and CO2 Emissions Reduction of China's Cement Industry

    E-Print Network [OSTI]

    Ke, Jing

    2013-01-01T23:59:59.000Z

    2050 China Energy and CO2 Emissions Report. Science Press,Energy Savings and CO2 Emissions Reduction of China’s CementEnergy Savings and CO2 Emissions Reduction of China’s Cement

  3. Pooled Bond Program (South Dakota)

    Broader source: Energy.gov [DOE]

    The Pooled Bond Program offered by the Economic Development Finance Authority is designed for capital intensive projects, providing small businesses access to larger capital markets for tax-exempt...

  4. Qualified Energy Conservation Bonds (QECBs)

    Broader source: Energy.gov [DOE]

    The ''Energy Improvement and Extension Act of 2008'', enacted in October 2008, authorized the issuance of Qualified Energy Conservation Bonds (QECBs) that may be used by state, local and tribal...

  5. Bond strength of cementitious borehole plugs in welded tuff

    SciTech Connect (OSTI)

    Akgun, H.; Daemen, J.J.K. [Arizona Univ., Tucson, AZ (USA). Dept. of Mining and Geological Engineering

    1991-02-01T23:59:59.000Z

    Axial loads on plugs or seals in an underground repository due to gas, water pressures and temperature changes induced subsequent to waste and plug emplacement lead to shear stresses at the plug/rock contact. Therefore, the bond between the plug and rock is a critical element for the design and effectiveness of plugs in boreholes, shafts or tunnels. This study includes a systematic investigation of the bond strength of cementitious borehole plugs in welded tuff. Analytical and numerical analysis of borehole plug-rock stress transfer mechanics is performed. The interface strength and deformation are studied as a function of Young`s modulus ratio of plug and rock, plug length and rock cylinder outside-to-inside radius ratio. The tensile stresses in and near an axially loaded plug are analyzed. The frictional interface strength of an axially loaded borehole plug, the effect of axial stress and lateral external stress, and thermal effects are also analyzed. Implications for plug design are discussed. The main conclusion is a strong recommendation to design friction plugs in shafts, drifts, tunnels or boreholes with a minimum length to diameter ratio of four. Such a geometrical design will reduce tensile stresses in the plug and in the host rock to a level which should minimize the risk of long-term deterioration caused by excessive tensile stresses. Push-out tests have been used to determine the bond strength by applying an axial load to cement plugs emplaced in boreholes in welded tuff cylinders. A total of 130 push-out tests have been performed as a function of borehole size, plug length, temperature, and degree of saturation of the host tuff. The use of four different borehole radii enables evaluation of size effects. 119 refs., 42 figs., 20 tabs.

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

    E-Print Network [OSTI]

    Hasanbeigi, Ali

    2013-01-01T23:59:59.000Z

    titanium dioxide nanoparticles for self-cleaning concrete surfaces Development of cement-based nanocomposites for various applications Energy/

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

    E-Print Network [OSTI]

    Hasanbeigi, Ali

    2013-01-01T23:59:59.000Z

    of granulated blast furnace slag and its effect on theblast furnace slag in cement results from the combined effects

  8. Improved cement quality and grinding efficiency by means of closed mill circuit modeling

    E-Print Network [OSTI]

    Mejeoumov, Gleb Gennadievich

    2009-05-15T23:59:59.000Z

    ..............................................................................................................................185 Page x LIST OF FIGURES Figure 1.1. Portland Cement (after Bhatty et al., 2004). ....................................................1 Figure 1.2. A Simplified Schematic of a Dry Cement Manufacturing Process. ................3 Figure 1....................................13 Figure 2.2. Typical Particle Size Distribution of a Type I Portland Cement Sample. .....16 Figure 2.3. Rosin-Rammler Representation of Cement PSD...........................................21 Figure 2.4. Blaine Calculation within the Particle...

  9. Downhole cement test in a very hot hole

    SciTech Connect (OSTI)

    Pettitt, R.A.; Cocks, G.G.; Dreesen, D.N.; Sims, J.R.; Nicholson, R.W.; Boevers, B.

    1982-01-01T23:59:59.000Z

    Completion of the commercial-sized Hot Dry Rock Geothermal Energy Project requires that hydraulic fractures be created between two inclined wellbores at a depth of about 4 km (15,000 ft). Isolation of a section of the open wellbore is necessary for pressurization to achieve the fracture connections. A cemented-in liner/PBR assembly is one of the methods used for zone isolation near the botton of the injection well. A downhole, pumped cement test was first conducted at a wellbore temperature of 275/sup 0/C (525/sup 0/F) to determine if a suitable slurry could be designed, pumped, and later recovered to assure the success of the cemented-in liner operation.

  10. Charm Dalitz Analyses

    E-Print Network [OSTI]

    G. Cavoto

    2007-07-09T23:59:59.000Z

    A review of recent experimental results of Dalitz analyses of charmed meson decays into three-body final states is presented. These analyses can help in understanding the strong interaction dynamics leading to the observed light mesons spectrum (low mass scalar $\\sigma$, $f_0(980)$, $a_0(980)$). A model for the decay amplitude into such states is very important for the extraction of the angle $\\gamma$ of the CKM unitarity triangle. Implications for such measurement are discussed.

  11. Impact of hydroxypropylguars on the early age hydration1 of portland cement2

    E-Print Network [OSTI]

    Impact of hydroxypropylguars on the early age hydration1 of portland cement2 3 4 Thomas Poinot: govin@emse.fr12 hal-00758284,version1-29Nov2012 Author manuscript, published in "Cement and Concrete on cement hydration was investigated in order to improve17 understanding on the delayed effect induced

  12. Modeling of Damage in Cement-Based Materials Subjected to External Sulfate Attack. I: Formulation

    E-Print Network [OSTI]

    Mobasher, Barzin

    Modeling of Damage in Cement-Based Materials Subjected to External Sulfate Attack. I: Formulation subject headings: Damage; Models; Sulfates; Cements. Introduction A majority of the durability issues. Portland cement-based materials subjected to attack from external sulfates may suffer from two types of dam

  13. DELETERIOUS EXPANSION OF CEMENT PASTE SUBJECTED TO WET-DRY CYCLES

    E-Print Network [OSTI]

    ·I CEMENT PASTE SUBJECTED TO WET-DRY CYCLES John A. Wells*, Emmanuel K with five cements produced in different regions of Canada. Test specimens with nominal diameters of 25 mm program show that cement paste specimens exhibit significant differences in the magnitude of expansion

  14. Alkaline stability of cellulose ethers and impact of their degradation products on cement hydration

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Alkaline stability of cellulose ethers and impact of their degradation products on cement-mail address: pourchez@emse.fr emse-00449712,version1-18Sep2010 Author manuscript, published in "Cement the potential role of cellulose ethers degradation on the alteration of the cement hydration kinetics

  15. Influence of Nucleation Seeding on the Compressive Strength of Ordinary Portland Cement and Alkali

    E-Print Network [OSTI]

    Portland Cement and Alkali Activated Blast-Furnace Slag M. Hubler, H. Jennings OF NUCLEATION SEEDING ON THE COMPRESSIVE STRENGTH OF ORDINARY PORTLAND CEMENT AND ALKALI ACTIVATED BLAST on the early hydration kinetics and compressive strength by seeding of Portland cement and alkali

  16. On the initial stages of cement hydration S. J. Preece, J. Billingham and A. C. King

    E-Print Network [OSTI]

    Billingham, John

    On the initial stages of cement hydration S. J. Preece, J. Billingham and A. C. King School the initial mixing of cement, an induction period occurs during which its consistency remains constant- stituent of cement, which is believed to be responsible for the initial development of its strength. Our

  17. Changes in Cement Paste and Mortar Fluidity after mixing induced by PCP

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Changes in Cement Paste and Mortar Fluidity after mixing induced by PCP: A parametric study-type superplasticizer (PCP) and cement hydration is not fully understood and incompatibilities between concrete-fluidification" by slump flow tests on mortar. Next, the time evolution of the rheological behaviour of cement pastes

  18. Cement & Concrete Science Conference: Leeds, 2009 Hydration of alite containing aluminium

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Cement & Concrete Science Conference: Leeds, 2009 Hydration of alite containing aluminium Begarin in cement is tricalcium silicate which leads during its hydration to the nucleation and growth of calcium silicate hydrate (referred to C-S-H (CaO)x-SiO2-(H2O)y). The development of this hydrate around the cement

  19. INFLUENCE OF HYDROXYPROPYLGUARS ON FRESH STATE PROPERTIES OF CEMENT-BASED MORTARS

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 INFLUENCE OF HYDROXYPROPYLGUARS ON FRESH STATE PROPERTIES OF CEMENT-BASED MORTARS Thomas Poinot that are the reference for this type of admixtures, these molecules delay the hydration of cement. Moreover, the effect on the water retention capacity of the mortar and the cement hydration kinetics. Keywords: Hydroxy

  20. Sr radionuclide in cement: An atomistic modeling study Mostafa Youssef a

    E-Print Network [OSTI]

    Yildiz, Bilge

    Docking 90 Sr radionuclide in cement: An atomistic modeling study Mostafa Youssef a , Roland J: Available online xxxx Keywords: Molecular simulation Cement Nuclear waste storage Mechanical properties a b crystalline analog, the 9 Å-tobermorite. C­S­H is the major binding phase of cement. Strontium was shown

  1. Optimization of cement and fly ash particle sizes to produce sustainable concretes Dale P. Bentz a,

    E-Print Network [OSTI]

    Bentz, Dale P.

    Optimization of cement and fly ash particle sizes to produce sustainable concretes Dale P. Bentz a and Technology, 100 Bureau Drive, Stop 7313, Gaithersburg, MD 20899-7313, USA b Roman Cement LLC, Salt Lake City form 29 April 2011 Accepted 30 April 2011 Available online 7 May 2011 Keywords: Blended cement Design

  2. Shallow-burial dolomite cement: a major component of many ancient sucrosic dolomites

    E-Print Network [OSTI]

    Hiatt, Eric E.

    Shallow-burial dolomite cement: a major component of many ancient sucrosic dolomites PHILIP W 54901, USA (E-mail: hiatt@uwosh.edu) ABSTRACT Dolomite cement is a significant and widespread component of Phanerozoic sucrosic dolomites. Cements in dolomites that were never deeply buried are limpid, have planar

  3. HEC influence on cement hydration measured by conductometry J. Pourchez 1 *

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 HEC influence on cement hydration measured by conductometry J. Pourchez 1 * -- P. Grosseau 1 -- R-mail address: pourchez@emse.fr emse-00449716,version1-18Sep2010 Author manuscript, published in "Cement cellulose (HEMC) and hydroxypropylmethyl cellulose (HPMC) molecular parameters on cement hydration

  4. Effect of gaseous cement industry effluents on four species of Amlie Talec a, b

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    of gaseous cement industry effluents on four species of microalgae Amélie Talec a, b , Myrvline Philistin a the possibility to grow microalgae with CO2 from gaseous effluent of cement industry. Four microalgal species the composition of a typical Cement Flue Gas (CFG). In a second stage, the culture submitted to the CFG received

  5. Probing Water Phases in Cement Blends using 1 Magnetic Resonance Relaxometry

    E-Print Network [OSTI]

    Sheffield, University of

    Probing Water Phases in Cement Blends using 1 H Nuclear Magnetic Resonance Relaxometry Jean)114 222 5973 Fax: +44 (0)114 222 5943 E-Mail: j.gorce@sheffield.ac.uk Extended Abstract: Cement and Concrete Science, Warwick, 16th + 17th September 2004 Introduction The nuclear industry uses blended cement

  6. Influence of hydroxypropylguars on rheological behaviour of cement-based mortars

    E-Print Network [OSTI]

    Boyer, Edmond

    Influence of hydroxypropylguars on rheological behaviour of cement-based mortars Thomas Poinot-mail address: govin@emse.fr hal-01056877,version1-21Aug2014 Author manuscript, published in "Cement, these molecules can also impact also the rheological behavior of cement-based materials. The influence of HPG

  7. A multiphase model for the early stages of the hydration of retarded oilwell cement

    E-Print Network [OSTI]

    Billingham, John

    A multiphase model for the early stages of the hydration of retarded oilwell cement J. Billingham, Birmingham B15 2TT, UK A.M. Harrisson The Rugby Group, RMC House Rugby CV21 2DT, UK Abstract. Cement is used in the oil industry to line oil wells. The major com- ponents of oilwell cement are tricalcium silicate (C3S

  8. CAPACITY INVESTMENT UNDER DEMAND UNCERTAINTY: THE ROLE OF IMPORTS IN THE U.S. CEMENT INDUSTRY

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    CAPACITY INVESTMENT UNDER DEMAND UNCERTAINTY: THE ROLE OF IMPORTS IN THE U.S. CEMENT INDUSTRY Guy of Imports in the U.S. Cement Industry. Guy Meunier INRA Ecole Polytechnique Jean-Pierre Ponssard CNRS Ecole decisions. This paper examines the nature of this relationship in the U.S. cement industry. Firms

  9. NMR investigations of water retention mechanism by cellulose ethers in cement-based materials

    E-Print Network [OSTI]

    Boyer, Edmond

    1 NMR investigations of water retention mechanism by cellulose ethers in cement-based materials J of freshly-mixed white cement pastes. NMRD is useful to determine the surface diffusion coefficient of water, the specific surface area and the hydration kinetics of the cement-based material. In spite of modifications

  10. CAPACITY INVESTMENT UNDER DEMAND UNCERTAINTY. AN EMPIRICAL STUDY OF THE US CEMENT INDUSTRY, 19942006*

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    CAPACITY INVESTMENT UNDER DEMAND UNCERTAINTY. AN EMPIRICAL STUDY OF THE US CEMENT INDUSTRY Demand Uncertainty. An Empirical Study of the US Cement Industry, 19942006* JeanPierre Ponssard of the theory literature on this topic in an empirical study of the US cement industry between 1994

  11. Impact of hydroxypropylguars on the early age hydration1 of portland cement2

    E-Print Network [OSTI]

    Boyer, Edmond

    Impact of hydroxypropylguars on the early age hydration1 of portland cement2 3 4 Thomas Poinot: govin@emse.fr12 hal-00758284,version2-15Feb2013 Author manuscript, published in "Cement and Concrete on cement hydration was investigated in order to improve17 understanding on the delayed effect induced

  12. Monotonic and cyclic flexural behavior of plain concrete beams strengthened by fabric-cement based composites

    E-Print Network [OSTI]

    Mobasher, Barzin

    Monotonic and cyclic flexural behavior of plain concrete beams strengthened by fabric-cement based: Pultrusion, fabric, cement paste, cyclic, flexural, ductility, strengthening, concrete beam ABSTRACT notch sensitive. Textile fabrics have been recently developed as a new class of cement based materials

  13. Flow of Fiber-Reinforced Cement Slurries at Elevated Temperatures Y. Wang and C. Meyer

    E-Print Network [OSTI]

    Meyer, Christian

    Flow of Fiber-Reinforced Cement Slurries at Elevated Temperatures Y. Wang and C. Meyer Dept. of Civil Eng. and Eng. Mech., Columbia University, New York, NY 10027, USA Abstract Cement slurries for a constant pressure drop of a fiber-reinforced cement slurry through an eccentric annulus at elevated

  14. Virtual Cement and Concrete Testing Laboratory Educational Version 2.0 User Guide

    E-Print Network [OSTI]

    Magee, Joseph W.

    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

  15. Z .Chemical Geology 152 1998 257271 The thermal and cementation histories of a sandstone petroleum

    E-Print Network [OSTI]

    Z .Chemical Geology 152 1998 257­271 The thermal and cementation histories of a sandstone petroleum of the cement formed, the maturation of petroleum in the interbedded shales likely postdates cementation. q 1998 and economic ) Corresponding author. Exxon Production Research Company, P.O 2189, Houston, TX 77252-2189, USA

  16. CHEMICAL AND HYDROLOGIC DATA FROM THE CEMENT CREEK AND UPPER ANIMAS RIVER CONFLUENCE AND

    E-Print Network [OSTI]

    CHEMICAL AND HYDROLOGIC DATA FROM THE CEMENT CREEK AND UPPER ANIMAS RIVER CONFLUENCE AND MIXING.S. Geological Survey #12;CHEMICAL AND HYDROLOGIC DATA FROM THE CEMENT CREEK AND UPPER ANIMAS RIVER CONFLUENCE.H., Schemel, L.E., 2007, Chemical and hydrologic data form the Cement Creek and upper Animas River confluence

  17. The effect of BaCO3 on the hydration of OPC and composite cements

    E-Print Network [OSTI]

    Sheffield, University of

    The effect of BaCO3 on the hydration of OPC and composite cements Claire A. Utton* and Neil B of ordinary Portland cement (OPC) and up to 90% blast furnace slag (BFS), are used to encapsulate Intermediate. The effect of BaCO3 on the hydration properties of composite cements is being studied. This paper reports

  18. Long-term sealing analyses for US Strategic Petroleum Reserve (SPR) caverns

    SciTech Connect (OSTI)

    Ehgartner, B.

    1994-02-01T23:59:59.000Z

    It is inevitable that sealing and abandonment will someday occur in a SPR cavern or caverns. To gain insight into the long-term behavior of a typical SPR cavern following sealing and abandonment, a suite of mechanical finite-element calculations was performed. The initial analyses predict how quickly and to what extent a cavern pressurizes after it is plugged. The analyses also examine the stability of the cavern as it changes shape due to the excessive pressures generated as the salt creeps and the brine in the cavern thermally expands. These large-scale analyses do not include the details of the plug but assume a good seal is established in the cavern wells. In another series of analyses, the potential for forming a leak at the plug is evaluated. A cement plug, emplaced in the casing seat of a cavern well, is loaded using the predicted brine pressures from the cavern analyses. The plugged casing analyses examine the potential for forming a leak path in and along the interfaces of salt, casing, and cement plug. In the last set of analysis, the dimensional scale of the problem is further reduced to examine a preexisting crack along a casing/salt interface. The cracked interface is assumed to be fluid filled and fully pressurized by the cavern fluids. The analyses address the potential for the fluid path to extend upwards along a plugged casing should an open microannulus surround the casing after it is plugged.

  19. Determination of age in forensic dentistry from cemental incremental lines

    E-Print Network [OSTI]

    Sousa, Eliane Marques Duarte de

    1987-01-01T23:59:59.000Z

    DETERMINATION OF AGE IN FORENSIC DENTISTRY FROM CEMENTAL INCREMENTAL LINES Thes' s by ELIANE MARJUES DLARTE DF SOUSA Submitted to the Graduate College of Texas A?M Univer ity ' n r. srt' al f"lf' llment of the requirements for the degree... of MASTEP OF S IENCE December 1987 Major Subject: Veterinary Anatomy DETERMINATION OF AGE IN FORENSIC DENTISTRy FROM CEMENTAL INCREMENTAL LINES A Thesis by ELIANE MARQUES DUARTE DE SOUSA Approved as to style and content by: eorge G. Stott (Chairman...

  20. Cementation factor and water saturation exponent in low porosity sandstones

    E-Print Network [OSTI]

    Owen, Stephen Douglas

    1984-01-01T23:59:59.000Z

    and cementation factor when porosity was below 0. 15, and a linear relationship was found between cementa- tion factor and clay content. No relationship was found between porosity and water saturat1on exponent, or cementation factor and water saturat1on... granular formations in the absence of laboratory analysis. In 1977, Bush and Jenkins~~ suggested a simple method for deter- mining clay content, which was used in this study. 103 102 z 0 M 0 10 2 3 4 5678910 2 3 4 5 6 7 8 1p2 POROSITY Fig. I...

  1. CONVERTIBLE BONDS IN A DEFAULTABLE DIFFUSION MODEL

    E-Print Network [OSTI]

    Jeanblanc, Monique

    CONVERTIBLE BONDS IN A DEFAULTABLE DIFFUSION MODEL Tomasz R. Bielecki Department of Applied Research Grant PS12918. #12;2 Convertible Bonds in a Defaultable Diffusion Model 1 Introduction In [4), such as Convertible Bonds (CB), and we provided a rigorous decomposition of a CB into a bond component and a (game

  2. Molecular dynamics of gas phase hydrogen-bonded complexes

    E-Print Network [OSTI]

    Wofford, Billy Alan

    1987-01-01T23:59:59.000Z

    . These analyses have permitted the calculation of an approximate stretching harmonic force field for the hydrogen-bound heterodimer HCN---HF. In addition, a new technique is developed to determine both the ground state and equilibrium dissociation energies... OF FIGURES. CHAPTER I. INTRODUCTION. CHAPTER II. MOLECULAR DYNAMICS IN HYDROGEN-BONDED INTERACTIONS: A PRELIMINARY EXPERIMENTALLY DETERMINED HARMONIC STRETCHING FORCE FIELD FOR HCN---HF. Introduction. Experimental Calculations. 10 Discussion. 19...

  3. Mercury stabilization in chemically bonded phosphate ceramics

    SciTech Connect (OSTI)

    Wagh, A. S.; Singh, D.; Jeong, S. Y.

    2000-04-04T23:59:59.000Z

    Mercury stabilization and solidification is a significant challenge for conventional stabilization technologies. This is because of the stringent regulatory limits on leaching of its stabilized products. In a conventional cement stabilization process, Hg is converted at high pH to its hydroxide, which is not a very insoluble compound; hence the preferred route for Hg sulfidation to convert it into insoluble cinnabar (HgS). Unfortunately, efficient formation of this compound is pH-dependent. At a high pH, one obtains a more soluble Hg sulfate, in a very low pH range, insufficient immobilization occurs because of the escape of hydrogen sulfide, while efficient formation of HgS occurs only in a moderately acidic region. Thus, the pH range of 4 to 8 is where stabilization with Chemically Bonded Phosphate Ceramics (CBPC) is carried out. This paper discusses the authors experience on bench-scale stabilization of various US Department of Energy (DOE) waste streams containing Hg in the CBPC process. This process was developed to treat DOE's mixed waste streams. It is a room-temperature-setting process based on an acid-base reaction between magnesium oxide and monopotassium phosphate solution that forms a dense ceramic within hours. For Hg stabilization, addition of a small amount (< 1 wt.%) of Na{sub 2}S or K{sub 2}S is sufficient in the binder composition. Here the Toxicity Characteristic Leaching Procedure (TCLP) results on CBPC waste forms of surrogate waste streams representing secondary Hg containing wastes such as combustion residues and Delphi DETOX{trademark} residues are presented. The results show that although the current limit on leaching of Hg is 0.2 mg/L, the results from the CBPC waste forms are at least one order lower than this stringent limit. Encouraged by these results on surrogate wastes, they treated actual low-level Hg-containing mixed waste from their facility at Idaho. TCLP results on this waste are presented here. The efficient stabilization in all these cases is attributed to chemical immobilization as both a sulfide (cinnabar) and a phosphate, followed by its physical encapsulation in a dense matrix of the ceramic.

  4. Transient liquid phase ceramic bonding

    DOE Patents [OSTI]

    Glaeser, Andreas M. (Berkeley, CA)

    1994-01-01T23:59:59.000Z

    Ceramics are joined to themselves or to metals using a transient liquid phase method employing three layers, one of which is a refractory metal, ceramic or alloy. The refractory layer is placed between two metal layers, each of which has a lower melting point than the refractory layer. The three layers are pressed between the two articles to be bonded to form an assembly. The assembly is heated to a bonding temperature at which the refractory layer remains solid, but the two metal layers melt to form a liquid. The refractory layer reacts with the surrounding liquid and a single solid bonding layer is eventually formed. The layers may be designed to react completely with each other and form refractory intermetallic bonding layers. Impurities incorporated into the refractory metal may react with the metal layers to form refractory compounds. Another method for joining ceramic articles employs a ceramic interlayer sandwiched between two metal layers. In alternative embodiments, the metal layers may include sublayers. A method is also provided for joining two ceramic articles using a single interlayer. An alternate bonding method provides a refractory-metal oxide interlayer placed adjacent to a strong oxide former. Aluminum or aluminum alloys are joined together using metal interlayers.

  5. Modeling of diffusive mass transport in micropores in cement based materials

    SciTech Connect (OSTI)

    Yamaguchi, Tetsuji, E-mail: yamaguchi.tetsuji@jaea.go.j [Japan Atomic Energy Agency, Shirakata, Tokai, Ibaraki 319-1195 (Japan); Negishi, Kumi [Japan Atomic Energy Agency, Shirakata, Tokai, Ibaraki 319-1195 (Japan); Taiheiyo Consultant Company Limited, 2-4-2, Osaku, Sakura, Chiba 285-8655 (Japan); Hoshino, Seiichi; Tanaka, Tadao [Japan Atomic Energy Agency, Shirakata, Tokai, Ibaraki 319-1195 (Japan)

    2009-12-15T23:59:59.000Z

    In order to predict long-term leaching behavior of cement constituents for safety assessments of radioactive waste disposal, we modeled diffusive mass transport in micropores in cement based materials. Based on available knowledge on the pore structure, we developed a transport porosity model that enables us to estimate effective porosity available for diffusion (transport porosity) in cement based materials. We microscopically examined the pore structure of hardened cement pastes to partially verify the model. Effective diffusivities of tritiated water in hardened cement pastes were also obtained experimentally, and were shown to be proportional to the estimated transport porosity.

  6. 'The Overriding Demand for Energy Conservation in the Cement Industry' An Update

    E-Print Network [OSTI]

    Spellman, L. U.

    1981-01-01T23:59:59.000Z

    addi tives. While cement makes up only about 7 to 15 percent of the weight of concrete, it is 1:5y far the greatest contributor of energy content in the mixture. Cement, usually portland cement, is a product derived from pyro-processing calcareous... and argillaceous materials such as limestone and clay or shale into an intermediate fused material called clinker, which is subse quently ground together with a small amount of gypsum. Portland cement is the principal material produced by the U. S. cement...

  7. Cement fatigue and HPHT well integrity with application to life of well prediction

    E-Print Network [OSTI]

    Ugwu, Ignatius Obinna

    2009-05-15T23:59:59.000Z

    to the cyclic loading and few data sets may not be sufficient to give an adequate description of cement behavior under fatigue loading. Studies were conducted by Kim and Kim 2 on the fatigue behavior of high strength concrete using a type I Portland cement....3: Comparison of Max Stress Levels to Number of Cycles for Different Cement Strengths [2] Antrim 3 conducted fatigue studies on hardened ordinary Portland (type I) cement paste using 2 specimens; one with a high-water cement ratio of 0.7 and another...

  8. Ideally Glassy Hydrogen Bonded Networks

    E-Print Network [OSTI]

    J. C. Phillips

    2005-08-05T23:59:59.000Z

    The axiomatic theory of ideally glassy networks, which has proved effective in describing phase diagrams and properties of chalcogenide and oxide glasses and their foreign interfaces, is broadened here to include intermolecular interactions in hydrogen-bonded polyalcohols such as glycerol, monosaccharides (glucose), and the optimal bioprotective hydrogen-bonded disaccharide networks formed from trehalose. The methods of Lagrangian mechanics and Maxwellian scaffolds are useful at the molecular level when bonding hierarchies are characterized by constraint counting similar to the chemical methods used by Huckel and Pauling. Whereas Newtonian molecular dynamical methods are useful for simulating large-scale interactions for times of order 10 ps, constraint counting describes network properties on glassy (almost equilibrated) time scales, which may be of cosmological order for oxide glasses, or years for trehalose. The ideally glassy network of trehalose may consist of extensible tandem sandwich arrays.

  9. CONSTRUCTION-GRADE CEMENT PRODUCTION FROM CONTAMINATED SEDIMENTS USING

    E-Print Network [OSTI]

    Brookhaven National Laboratory

    developed the Cement-LockTM Technology a versatile, cost-effective, and environmentally friendly-Region 2 and the U.S. Department of Energy. Keywords: Dredging, dredged material, beneficial use dredged from the New York/New Jersey harbor to maintain water depths for shipping channels, berthing areas

  10. Surface effects of cement-based solidified waste forms

    E-Print Network [OSTI]

    Pavlonnis, George

    1998-01-01T23:59:59.000Z

    This study was performed in order to determine-nine if the surface characteristics of cement-based waste forms were different than those of the bulk material. This was done as a prelude to the potential development of an accelerated leach test...

  11. Study of composite cement containing burned oil shale

    E-Print Network [OSTI]

    Dalang, Robert C.

    Study of composite cement containing burned oil shale Julien Ston Supervisors : Prof. Karen properties. SCMs can be by-products from various industries or of natural origin, such as shale. Oil shale correctly, give a material with some cementitious properties known as burned oil shale (BOS). This study

  12. Westinghouse Cementation Facility of Solid Waste Treatment System - 13503

    SciTech Connect (OSTI)

    Jacobs, Torsten; Aign, Joerg [Westinghouse Electric Germany GmbH, Global Waste Management, Tarpenring 6, D- 22419 Hamburg (Germany)] [Westinghouse Electric Germany GmbH, Global Waste Management, Tarpenring 6, D- 22419 Hamburg (Germany)

    2013-07-01T23:59:59.000Z

    During NPP operation, several waste streams are generated, caused by different technical and physical processes. Besides others, liquid waste represents one of the major types of waste. Depending on national regulation for storage and disposal of radioactive waste, solidification can be one specific requirement. To accommodate the global request for waste treatment systems Westinghouse developed several specific treatment processes for the different types of waste. In the period of 2006 to 2008 Westinghouse awarded several contracts for the design and delivery of waste treatment systems related to the latest CPR-1000 nuclear power plants. One of these contracts contains the delivery of four Cementation Facilities for waste treatment, s.c. 'Follow on Cementations' dedicated to three locations, HongYanHe, NingDe and YangJiang, of new CPR-1000 nuclear power stations in the People's Republic of China. Previously, Westinghouse delivered a similar cementation facility to the CPR-1000 plant LingAo II, in Daya Bay, PR China. This plant already passed the hot functioning tests successfully in June 2012 and is now ready and released for regular operation. The 'Follow on plants' are designed to package three 'typical' kind of radioactive waste: evaporator concentrates, spent resins and filter cartridges. The purpose of this paper is to provide an overview on the Westinghouse experience to design and execution of cementation facilities. (authors)

  13. Contact Mechanics Based Mechanical Characterization of Portland Cement Paste

    E-Print Network [OSTI]

    Jones, Christopher

    2012-02-14T23:59:59.000Z

    that the calcium silicate hydrate (C-S-H) phase of hydrated portland cement has different properties on the nanometric scale than on the micron scale. Packing density of C-S-H particles is proposed as an explanation for the disparity in the measured results...

  14. Contact Mechanics Based Mechanical Characterization of Portland Cement Paste 

    E-Print Network [OSTI]

    Jones, Christopher

    2012-02-14T23:59:59.000Z

    are derived to characterize creep indentation tests performed on hardened cement paste and to extract the time-dependent properties. The effect of approximating C-S-H viscoelastic properties with a time-independent Poisson's ratio is discussed, and arguments...

  15. Development of Bulk Nanocrystalline Cemented Tungsten Carbide for Industrial Applicaitons

    SciTech Connect (OSTI)

    Z. Zak Fang, H. Y. Sohn

    2009-03-10T23:59:59.000Z

    This report contains detailed information of the research program entitled "Development of Bulk Nanocrystalline Cemented Tungsten Carbide Materials for Industrial Applications". The report include the processes that were developed for producing nanosized WC/Co composite powders, and an ultrahigh pressure rapid hot consolidation process for sintering of nanosized powders. The mechanical properties of consolidated materials using the nanosized powders are also reported.

  16. More durable roof coverings such as steel and fiber cement

    E-Print Network [OSTI]

    - heating equipment saves money. Tankless water heaters provide hot water on demand at a preset temperature- cement siding is termite- and water-resistant and warrantied to last 50 years. Increasing the amount natural daylighting. Xeriscaping, or using native plants, significantly reduces the need for watering

  17. Bond Programs | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:EzfeedflagBiomass ConversionsSouthby 2022 |BleckleyMotionBocaBond County, Illinois:Bond

  18. Bonded polyimide fuel cell package

    DOE Patents [OSTI]

    Morse, Jeffrey D.; Jankowski, Alan; Graff, Robert T.; Bettencourt, Kerry

    2010-06-08T23:59:59.000Z

    Described herein are processes for fabricating microfluidic fuel cell systems with embedded components in which micron-scale features are formed by bonding layers of DuPont Kapton.TM. polyimide laminate. A microfluidic fuel cell system fabricated using this process is also described.

  19. Non-bonded ultrasonic transducer

    DOE Patents [OSTI]

    Eoff, J.M.

    1984-07-06T23:59:59.000Z

    A mechanically assembled non-bonded ultrasonic transducer includes a substrate, a piezoelectric film, a wetting agent, a thin metal electrode, and a lens held in intimate contact by a mechanical clamp. No epoxy or glue is used in the assembly of this device.

  20. Opportunities for Energy Efficiency and Demand Response in the California Cement Industry

    SciTech Connect (OSTI)

    Olsen, Daniel; Goli, Sasank; Faulkner, David; McKane, Aimee

    2010-12-22T23:59:59.000Z

    This study examines the characteristics of cement plants and their ability to shed or shift load to participate in demand response (DR). Relevant factors investigated include the various equipment and processes used to make cement, the operational limitations cement plants are subject to, and the quantities and sources of energy used in the cement-making process. Opportunities for energy efficiency improvements are also reviewed. The results suggest that cement plants are good candidates for DR participation. The cement industry consumes over 400 trillion Btu of energy annually in the United States, and consumes over 150 MW of electricity in California alone. The chemical reactions required to make cement occur only in the cement kiln, and intermediate products are routinely stored between processing stages without negative effects. Cement plants also operate continuously for months at a time between shutdowns, allowing flexibility in operational scheduling. In addition, several examples of cement plants altering their electricity consumption based on utility incentives are discussed. Further study is needed to determine the practical potential for automated demand response (Auto-DR) and to investigate the magnitude and shape of achievable sheds and shifts.

  1. Electrical conductivity is a parameter that can be used to monitor the entire hardening process of oilwell cement slurries. The theo-

    E-Print Network [OSTI]

    Backe, Knut

    process of oilwell cement slurries. The theo- retical relationship among conductivity, porosity, cement and that rapid hydration will reduce the risk of gas migration. Introduction The main purposes of oilwell cements hardening process of oilwell cement slurries is important for successful cementing operations. Several

  2. A Coupled Nanoindentation/SEM-EDS Study on Low Water/Cement Ratio Portland Cement Paste: Evidence for C-S-H/Ca(OH)[subscript 2] Nanocomposites

    E-Print Network [OSTI]

    Chen, Jeffrey J.

    A low water/cement ratio (w/c=0.20) hydrated Portland cement paste was analyzed by grid-indentation coupled with ex situ scanning electron microscope-energy-dispersive X-ray spectra (SEM-EDS) analysis at each indentation ...

  3. Major Business Expansion Bond Program (Maine)

    Broader source: Energy.gov [DOE]

    The Major Business Expansion Bond Program provides long-term, credit-enhanced financing up to $25,000,000 at taxable bond rates for businesses creating or retaining at least 50 jobs; up to $10,000...

  4. Industrial Revenue Bond Issuance Cost Assistance (Wisconsin)

    Broader source: Energy.gov [DOE]

    Industrial Revenue Bonds (IRB) are tax-exempt bonds that can be used to stimulate capital investment and job creation by providing private borrowers with access to financing at interest rates that...

  5. Secondary Market Taxable Bond Program (Maine)

    Broader source: Energy.gov [DOE]

    The Secondary Market Taxable Bond Program provides tax-exempt interest rate bond financing for real estate and machinery and equipment acquisitions. Up to 90% of the project debt may be financed,...

  6. The Market for Borrowing Corporate Bonds

    E-Print Network [OSTI]

    Asquith, Paul

    This paper describes the market for borrowing corporate bonds using a comprehensive data set from a major lender. The cost of borrowing corporate bonds is comparable to the cost of borrowing stock, between 10 and 20 basis ...

  7. Bonded, walk-off compensated optical elements

    DOE Patents [OSTI]

    Ebbers, Christopher A. (Livermore, CA)

    2003-04-08T23:59:59.000Z

    A bonded, walk-off compensated crystal, for use with optical equipment, and methods of making optical components including same.

  8. Analysis of Energy-Efficiency Opportunities for the Cement Industry in Shandong Province, China

    SciTech Connect (OSTI)

    Price, Lynn; Hasanbeigi, Ali; Lu, Hongyou; Wang, Lan

    2009-10-01T23:59:59.000Z

    China's cement industry, which produced 1,388 million metric tons (Mt) of cement in 2008, accounts for almost half of the world's total cement production. Nearly 40% of China's cement production is from relatively obsolete vertical shaft kiln (VSK) cement plants, with the remainder from more modern rotary kiln cement plants, including plants equipped with new suspension pre-heater and pre-calciner (NSP) kilns. Shandong Province is the largest cement-producing Province in China, producing 10% of China's total cement output in 2008. This report documents an analysis of the potential to improve the energy efficiency of NSP kiln cement plants in Shandong Province. Sixteen NSP kiln cement plants were surveyed regarding their cement production, energy consumption, and current adoption of 34 energy-efficient technologies and measures. Plant energy use was compared to both domestic (Chinese) and international best practice using the Benchmarking and Energy Saving Tool for Cement (BEST-Cement). This benchmarking exercise indicated an average technical potential primary energy savings of 12% would be possible if the surveyed plants operated at domestic best practice levels in terms of energy use per ton of cement produced. Average technical potential primary energy savings of 23% would be realized if the plants operated at international best practice levels. Energy conservation supply curves for both fuel and electricity savings were then constructed for the 16 surveyed plants. Using the bottom-up electricity conservation supply curve model, the cost-effective electricity efficiency potential for the studied cement plants in 2008 is estimated to be 373 gigawatt hours (GWh), which accounts for 16% of total electricity use in the 16 surveyed cement plants in 2008. Total technical electricity-saving potential is 915 GWh, which accounts for 40% of total electricity use in the studied plants in 2008. The fuel conservation supply curve model shows the total technical fuel efficiency potential equal to 7,949 terajoules (TJ), accounting for 8% of total fuel used in the studied cement plants in 2008. All the fuel efficiency potential is shown to be cost effective. Carbon dioxide (CO{sub 2}) emission reduction potential associated with cost-effective electricity saving is 383 kiloton (kt) CO{sub 2}, while total technical potential for CO{sub 2} emission reduction from electricity-saving is 940 ktCO{sub 2}. The CO{sub 2} emission reduction potentials associated with fuel-saving potentials is 950 ktCO{sub 2}.

  9. Scanning probe microscopy: Sulfate minerals in scales and cements

    SciTech Connect (OSTI)

    Hall, C. [Schlumberger Cambridge Research (United Kingdom)

    1995-11-01T23:59:59.000Z

    The principles of scanning probe microscopy (SPM) are illustrated with examples from oilfield mineralogy, particularly emphasizing sulfate minerals involved in scale formation and cement hydration chemistry. The topography of the (010) cleavage surface of gypsum observed by atomic force microscopy shows atomically flat terraces separated by shallow steps often only one unit cell high. SPM allows direct observation of processes on mineral surfaces while they are in contact with solutions. The dissolution etching and crystal growth of gypsum and barite are discussed and rates of step migration estimated. The orientation of steps is related to the crystallographic axes. The action of phosphonate crystal growth inhibitor on gypsum and of a chelating scale solvent on barite are also shown. The multiphase microstructure of an oilwell cement clinker is described in relation to its hydration chemistry in contact with water and its reaction with sulfate ions.

  10. Impact of admixtures on the hydration kinetics of Portland cement

    SciTech Connect (OSTI)

    Cheung, J., E-mail: Josephine.H.Cheung@grace.com [W.R. Grace, 62 Whittemore Avenue, Cambridge MA 02140 (United States); Jeknavorian, A. [W.R. Grace, 62 Whittemore Avenue, Cambridge MA 02140 (United States); Roberts, L. [Roberts Consulting Group LLC, 44 Windsor Avenue, Acton MA 01720 (United States); Silva, D. [W.R. Grace, 62 Whittemore Avenue, Cambridge MA 02140 (United States)

    2011-12-15T23:59:59.000Z

    Most concrete produced today includes either chemical additions to the cement, chemical admixtures in the concrete, or both. These chemicals alter a number of properties of cementitious systems, including hydration behavior, and it has been long understood by practitioners that these systems can differ widely in response to such chemicals. In this paper the impact on hydration of several classes of chemicals is reviewed with an emphasis on the current understanding of interactions with cement chemistry. These include setting retarders, accelerators, and water reducing dispersants. The ability of the chemicals to alter the aluminate-sulfate balance of cementitious systems is discussed with a focus on the impact on silicate hydration. As a key example of this complex interaction, unusual behavior sometimes observed in systems containing high calcium fly ash is highlighted.

  11. Clean Energy and Bond Finance Initiative

    Broader source: Energy.gov [DOE]

    Provides information on Clean Energy and Bond Finance Initiative (CE+BFI). CE+BFI brings together public infrastructure finance agencies, clean energy public fund managers and institutional investors across the country to explore how to raise capital at scale for clean energy development through bond financing. Author: Clean Energy and Bond Finance Initiative

  12. Liquid-Solid Phase Transition Alloy as Reversible and Rapid Molding Bone Cement

    E-Print Network [OSTI]

    Yi, Liting; Liu, Jing

    2013-01-01T23:59:59.000Z

    Bone cement has been demonstrated as an essential restorative material in the orthopedic surgery. However current materials often imply unavoidable drawbacks, such as tissue-cement reaction induced thermal injuries and troublesome revision procedure. Here we proposed an injectable alloy cement to address such problems through its liquid-solid phase transition mechanism. The cement is made of a unique alloy BiInSnZn with a specifically designed low melting point 57.5{\\deg}C. This property enables its rapid molding into various shapes with high plasticity. Some fundamental characteristics including mechanical strength behaviors and phase transition-induced thermal features have been measured to demonstrate the competence of alloy as unconventional cement with favorable merits. Further biocompatible tests showed that this material could be safely employed in vivo. In addition, experiments also found the alloy cement capability as an excellent contrast agent for radiation imaging. Particularly, the proposed alloy...

  13. Cactus, Pixies, 04 Sept 09 Sittin' here wishin' on a cement floor

    E-Print Network [OSTI]

    Reiners, Peter W.

    Cactus, Pixies, 04 Sept 09 Em Sittin' here wishin' on a cement floor G Em just wishin' that I had that dress when you di-yi-yi-yi-yine Em Sittin' here wishin' on a cement floor G Em just wishin' that I had it to me Em Sittin' here wishin' on a cement floor G Em just wishin' that I had something you wore #12;

  14. Quantifying the Co-benefits of Energy-Efficiency Programs: A Case Study of the Cement Industry in Shandong Province, China

    E-Print Network [OSTI]

    Hasanbeigi, Ali

    2014-01-01T23:59:59.000Z

    ingredient in cement: vertical shaft kilns and rotary kilns.cement was produced by plants using outdated vertical shaft kilns (Vertical shaft kilns (Mt) Rotary (NSP + other) kilns (Mt) Clinker production (Mt) Clinker-cement

  15. EEG analyses with SOBI.

    SciTech Connect (OSTI)

    Glickman, Matthew R.; Tang, Akaysha (University of New Mexico, Albuquerque, NM)

    2009-02-01T23:59:59.000Z

    The motivating vision behind Sandia's MENTOR/PAL LDRD project has been that of systems which use real-time psychophysiological data to support and enhance human performance, both individually and of groups. Relevant and significant psychophysiological data being a necessary prerequisite to such systems, this LDRD has focused on identifying and refining such signals. The project has focused in particular on EEG (electroencephalogram) data as a promising candidate signal because it (potentially) provides a broad window on brain activity with relatively low cost and logistical constraints. We report here on two analyses performed on EEG data collected in this project using the SOBI (Second Order Blind Identification) algorithm to identify two independent sources of brain activity: one in the frontal lobe and one in the occipital. The first study looks at directional influences between the two components, while the second study looks at inferring gender based upon the frontal component.

  16. Policy Options for Encouraging Energy Efficiency Best Practices in Shandong Province's Cement Industry

    E-Print Network [OSTI]

    Price, Lynn

    2013-01-01T23:59:59.000Z

    experience reviewing energy consumption data reported bybe noted that energy consumption data are not directlythe cement sector energy consumption data published by the

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

    E-Print Network [OSTI]

    Hasanbeigi, Ali

    2013-01-01T23:59:59.000Z

    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

  18. Microsoft Word - NETL-TRS-003-2012_Cementing Research Needs_20121207...

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

    parameters would help identify key elements for cement design, which would be utilized by API to develop new standards or update existing best practices to ensure safe wellbore...

  19. Analysis of Energy-Efficiency Opportunities for the Cement Industry in Shandong Province, China

    E-Print Network [OSTI]

    Price, Lynn

    2010-01-01T23:59:59.000Z

    Sustainable Development waste heat recovery World Wide FundTaishan Cement Works Waste Heat Recovery and Utilisation forPlant’s Low Temperature Waste Heat Power Generation Project.

  20. Cementing operations on Fenton Hill during FY1987, 1 October 1986-September 1987

    SciTech Connect (OSTI)

    Cocks, G.G.; Dreesen, D.S.; Gill, P.J.; Root, R.L.

    1988-01-01T23:59:59.000Z

    As part of repairing and sidetracking EE-2 geothermal well, a number of cementing operations were successfully carried out. These included; plugging back of EE-2 below the proposed side track site, cement behind casing at 10220-24 ft, cement behind casing at 9800-04 ft, whipstock plug, and the cementing through perforations of the 9-5/8 in. casing from 6500 ft to the surface. Specific data on each of these operations is given, and the results discussed. 1 ref., 4 figs.

  1. Potential Energy Savings and CO2 Emissions Reduction of China's Cement Industry

    E-Print Network [OSTI]

    Ke, Jing

    2013-01-01T23:59:59.000Z

    dioxide (CO2) emissions from fossil fuel combustion, as wellCO2 emissions (including cement process and fossil fuel combustion

  2. Analysis of Energy-Efficiency Opportunities for the Cement Industry in Shandong Province, China

    E-Print Network [OSTI]

    Price, Lynn

    2010-01-01T23:59:59.000Z

    of Demonstrated Energy Technologies (CADDET), Internationaland MAIN. 1993. Energy Technology in the Cement IndustrialAugust 19, 2009. Energy Technology Support Unit (ETSU).

  3. Estimation of CO2 Emissions from China's Cement Production: Methodologies and Uncertainties

    E-Print Network [OSTI]

    Ke, Jing

    2014-01-01T23:59:59.000Z

    L. , 2006. Discussion of CO2 emission reduction in ChineseFurther discussion of CO2 emission reduction in Chinesecalculation method of CO2 emissions of cement production.

  4. Bonding, antibonding and tunable optical forces in asymmetric membranes

    E-Print Network [OSTI]

    Hui, Pui-Chuen

    We demonstrate that tunable attractive (bonding) and repulsive (anti-bonding) forces can arise in highly asymmetric structures coupled to external radiation, a consequence of the bonding/anti-bonding level repulsion of ...

  5. Ceramic-bonded abrasive grinding tools

    DOE Patents [OSTI]

    Holcombe, Jr., Cressie E. (Farragut, TN); Gorin, Andrew H. (Knoxville, TN); Seals, Roland D. (Oak Ridge, TN)

    1994-01-01T23:59:59.000Z

    Abrasive grains such as boron carbide, silicon carbide, alumina, diamond, cubic boron nitride, and mullite are combined with a cement primarily comprised of zinc oxide and a reactive liquid setting agent and solidified into abrasive grinding tools. Such grinding tools are particularly suitable for grinding and polishing stone, such as marble and granite.

  6. Ceramic-bonded abrasive grinding tools

    DOE Patents [OSTI]

    Holcombe, C.E. Jr.; Gorin, A.H.; Seals, R.D.

    1994-11-22T23:59:59.000Z

    Abrasive grains such as boron carbide, silicon carbide, alumina, diamond, cubic boron nitride, and mullite are combined with a cement primarily comprised of zinc oxide and a reactive liquid setting agent and solidified into abrasive grinding tools. Such grinding tools are particularly suitable for grinding and polishing stone, such as marble and granite.

  7. Imaging Wellbore Cement Degradation by Carbon Dioxide under Geologic Sequestration Conditions Using X?ray Computed Microtomography

    SciTech Connect (OSTI)

    Jung, Hun Bok; Jansik, Danielle P.; Um, Wooyong

    2013-01-01T23:59:59.000Z

    ABSTRACT: X-ray microtomography (XMT), a nondestructive three-dimensional imaging technique, was applied to demonstrate its capability to visualize the mineralogical alteration and microstructure changes in hydrated Portland cement exposed to carbon dioxide under geologic sequestration conditions. Steel coupons and basalt fragments were added to the cement paste in order to simulate cement-steel and cement-rock interfaces. XMT image analysis showed the changes of material density and porosity in the degradation front (density: 1.98 g/cm3, porosity: 40%) and the carbonated zone (density: 2.27 g/cm3, porosity: 23%) after reaction with CO2- saturated water for 5 months compared to unaltered cement (density: 2.15 g/cm3, porosity: 30%). Three-dimensional XMT imaging was capable of displaying spatially heterogeneous alteration in cement pores, calcium carbonate precipitation in cement cracks, and preferential cement alteration along the cement-steel and cement-rock interfaces. This result also indicates that the interface between cement and host rock or steel casing is likely more vulnerable to a CO2 attack than the cement matrix in a wellbore environment. It is shown here that XMT imaging can potentially provide a new insight into the physical and chemical degradation of wellbore cement by CO2 leakage.

  8. Bond Program | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:EzfeedflagBiomass ConversionsSouthby 2022 |BleckleyMotionBocaBond County, Illinois:

  9. For the last decades, cement technologies encountered a very rapid evolution following the will to always built quicker with more efficient materials. The additional young appearance of ecological trends pushed cement industries to an adaption and improve

    E-Print Network [OSTI]

    Dalang, Robert C.

    For the last decades, cement technologies encountered a very rapid evolution following pushed cement industries to an adaption and improvement of their production methods in order to mini of the cement with supplementary cementitious mate- rials (SCMs) being generally waste from other industries

  10. The Effect of Cement Mechanical Properties and Reservoir Compaction on HPHT Well Integrity

    E-Print Network [OSTI]

    Yuan, Zhaoguang

    2012-11-15T23:59:59.000Z

    Cement high- cycle fatigue failure constant B Cement high -cycle fatigue failure constant C Rock internal strength, psi Cr Volumetric solid...-grain compressibility, psi-1 Cbc Volumetric bulk-volume compressibility, psi-1 E Young?s modulus, psi F Critical force, lbf G...

  11. Using artificial neural networks to predict the quality and performance of oilfield cements

    SciTech Connect (OSTI)

    Coveney, P.V.; Hughes, T.L. [Schlumberger Cambridge Research Ltd., Cambridge (United Kingdom); Fletcher, P. [Schlumberger Dowell, Skene, Aberdeen (United Kingdom)

    1996-12-31T23:59:59.000Z

    Inherent batch to batch variability, ageing and contamination are major factors contributing to variability in oilfield cement slurry performance. Of particular concern are problems encountered when a slurry is formulated with one cement sample and used with a batch having different properties. Such variability imposes a heavy burden on performance testing and is often a major factor in operational failure. We describe methods which allow the identification, characterization and prediction of the variability of oilfield cements. Our approach involves predicting cement compositions, particle size distributions and thickening time curves from the diffuse reflectance infrared Fourier transform spectrum of neat cement powders. Predictions make use of artificial neural networks. Slurry formulation thickening times can be predicted with uncertainties of less than {+-}10%. Composition and particle size distributions can be predicted with uncertainties a little greater than measurement error but general trends and differences between cements can be determined reliably. Our research shows that many key cement properties are captured within the Fourier transform infrared spectra of cement powders and can be predicted from these spectra using suitable neural network techniques. Several case studies are given to emphasize the use of these techniques which provide the basis for a valuable quality control tool now finding commercial use in the oilfield.

  12. The Effect of Cement Mechanical Properties and Reservoir Compaction on HPHT Well Integrity 

    E-Print Network [OSTI]

    Yuan, Zhaoguang

    2012-11-15T23:59:59.000Z

    In the life of a well, the cement sheath not only provides zonal isolation but also supports casing and increases casing-collapse resistance. Due to the high-pressure, high-temperature (HPHT) conditions, the cement sheath plays an important role...

  13. Towards Verified and Validated FE Simulations of a Femur with a Cemented Hip Prosthesis

    E-Print Network [OSTI]

    Yosibash, Zohar

    Towards Verified and Validated FE Simulations of a Femur with a Cemented Hip Prosthesis Zohar at the neck. The head and neck were removed and the femur was implanted with a cemented prosthesis. The fixed femur was CT-scanned and loaded through the prosthesis so that strains and displacements were measured

  14. PORTLAND CEMENT CONCRETE PAVEMENT FOR FLEXIBLE OVER RIGID COMPOSITE PAVEMENTS (Tollway)

    E-Print Network [OSTI]

    PORTLAND CEMENT CONCRETE PAVEMENT FOR FLEXIBLE OVER RIGID COMPOSITE PAVEMENTS (Tollway) Effective portland cement concrete for special applications to composite pavements as shown and described. Developing concrete mix design(s) that meets the performance requirements for the intended pavement; 4

  15. Quartz cementation inhibited by crestal oil charge: Miller deep water sandstone,

    E-Print Network [OSTI]

    Haszeldine, Stuart

    to the structural depth of the reservoir sandstones. Quartz cement volumes increase from the crest of the field porosity. By integrating petrographic observations with results of fluid inclusion measurements and O depths. Quartz cement precipitation condi- tions were constrained by integrating fluid inclusion

  16. USE OF VATERITE AND CALCITE IN FORMING CALCIUM PHOSPHATE CEMENT A. Cuneyt Tas

    E-Print Network [OSTI]

    Tas, A. Cuneyt

    calcium phosphate (CaP+CaCO3) cements have been developed. The common point in these cements was that they all utilized single-phase CaCO3 (calcite or vaterite) in their powder components. The major phase with some varying amounts of unreacted CaCO3. Calcite powders used were needle-like or acicular in shape

  17. Corrosion of Metals in Composite Cements Anthony Setiadi*, J. Hill and N. B. Milestone

    E-Print Network [OSTI]

    Sheffield, University of

    Corrosion of Metals in Composite Cements Anthony Setiadi*, J. Hill and N. B. Milestone. However, there may be issues regarding the corrosion of some of the metal components which arise from reprocessing and decommissioning due to the alkaline environment in the cement grouts. The corrosion

  18. Portland cement for SO/sub 2/ control in coal-fired power plants

    DOE Patents [OSTI]

    Steinberg, M.

    1984-10-17T23:59:59.000Z

    A method is described for removing oxides of sulfur from the emissions of fossil fuel combustion by injecting portland cement into the boiler with the fuel, the combustion air, or downstream with the combustion gases. The cement products that result from this method is also described. 1 tab.

  19. Speciation of heavy metals in cement-stabilized waste forms: A micro-spectroscopic study

    E-Print Network [OSTI]

    -ray fluorescence (XRF)) were used to investigate Co and Ni uptake by Hardened Cement Paste (HCP) with the aim. For Ni and Co, XRF mapping revealed a highly heterogeneous element distribution as far Elsevier B.V. All rights reserved. Keywords: Cement; Micro-XAS; Micro-XRF mapping; Ni; Co 1. Introduction

  20. Effect of Elevated Curing Temperature on Early Hydration and Microstructure of Composite Cements

    E-Print Network [OSTI]

    Sheffield, University of

    Effect of Elevated Curing Temperature on Early Hydration and Microstructure of Composite Cements J, Seascale, Cumbria, CA20 1PG, UK Abstract The heat of hydration of a number of composite cement systems has microscopy. Results showed that increasing the hydration temperature increased the rate of heat output

  1. Carbon leakage and competitiveness of cement and steel industries under the EU

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    No 53-2013 Carbon leakage and competitiveness of cement and steel industries under the EU ETS: much2014 #12;Carbon leakage and competitiveness of cement and steel industries under the EU ETS: much ado about nothing Abstract In a world of uneven climate policies, concerns about carbon leakage

  2. Thermal Energy Storage/Waste Heat Recovery Applications in the Cement Industry

    E-Print Network [OSTI]

    Beshore, D. G.; Jaeger, F. A.; Gartner, E. M.

    1979-01-01T23:59:59.000Z

    , and the Portland Cement Association have studied the potential benefits of using waste heat recovery methods and thermal energy storage systems in the cement manufacturing process. This work was performed under DOE Contract No. EC-77-C-01-50S4. The study has been...

  3. Portland cement for SO.sub.2 control in coal-fired power plants

    DOE Patents [OSTI]

    Steinberg, Meyer (Melville, NY)

    1985-01-01T23:59:59.000Z

    There is described a method of removing oxides of sulfur from the emissions of fossil fuel combustion by injecting portland cement into the boiler with the fuel, the combustion air, or downstream with the combustion gases. There is also described the cement products that result from this method.

  4. Z .Chemical Geology 152 1998 227256 The thermal and cementation histories of a sandstone petroleum

    E-Print Network [OSTI]

    Z .Chemical Geology 152 1998 227­256 The thermal and cementation histories of a sandstone petroleum-feldspars recovered at various depths from a deep well drilled through a carbonate-cemented sandstone petroleum of a sandstone petroleum xreservoir, Elk Hills, California. Part 2: In situ oxygen and carbon isotopic results

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

    E-Print Network [OSTI]

    Harms, Kyle E.

    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 sustainability has risen, engineers have looked to alternative binders such as fly ash, silica fume, slag cement

  6. 618 IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 46, NO. 4, APRIL 2001 Robust Stabilization of a Nonlinear Cement Mill Model

    E-Print Network [OSTI]

    Bastin, Georges

    of a Nonlinear Cement Mill Model F. Grognard, F. Jadot, L. Magni, G. Bastin, R. Sepulchre, and V. Wertz Abstract--Plugging is well known to be a major cause of instability in in- dustrial cement mills. A simple nonlinear model- troller can be designed in order to fully prevent the mill from plugging. Index Terms--Cement mill

  7. Effect of the variations of clinker composition on the poroelastic properties of hardened class G cement paste

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    cement paste Siavash Ghabezloo Universit´e Paris-Est, Laboratoire Navier-CERMES, Ecole des Ponts Paris of class G oil-well cement pastes is studied using a multiscale homogenization model. The model has been cements from literature are used in a hydration model to evaluate the volume fractions

  8. 502 IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, VOL. 7, NO. 4, JULY 1999 Multivariable Nonlinear Predictive Control of Cement Mills

    E-Print Network [OSTI]

    Bastin, Georges

    Nonlinear Predictive Control of Cement Mills Lalo Magni, Georges Bastin, and Vincent Wertz Abstract--A new multivariable controller for cement milling circuits is presented, which is based on a nonlinear model: a change of hardness of the raw material. Index Terms--Cement industry, multivariable control systems

  9. Dale P. Bentz' and Paul E. Stutzmanl SEM ANALYSIS AND COMPUTER MODELLING OF HYDRATION OF PORTLAND CEMENT

    E-Print Network [OSTI]

    Bentz, Dale P.

    CEMENT PARTICLES REPERENCE: Bentz, D. P. and Stutzman, P. E., "S)314Anslysisand Computer Modelling of Hydration of Portland Cement Particles,* petrov~ ~* lmMSLuu* Sharon M. DeHayes and David Stark, Eds., American Society for Testing and Materials, Philadelphia, 1994, ASS'J!RACT: Characterization of cement

  10. Disseminated `jigsaw piece' dolomite in Upper Jurassic shelf sandstones, Central North Sea: an example of cement growth

    E-Print Network [OSTI]

    Haszeldine, Stuart

    : an example of cement growth during bioturbation? JAMES P. HENDRY*1 , MARK WILKINSON , ANTHONY E. FALLICKà crystals and consequent cementation of the grain framework. Continued exchange of Mg2+ and Ca2 on calcite cementation in marine sandstones in recent years has greatly improved our understanding

  11. NICOM 4: 4th International Symposium on Nanotechnology in Construction Effect of Nanosilica on Cement Hydration under High Temperature and

    E-Print Network [OSTI]

    Al-Majed, Abdulaziz Abdullah

    ), the silicate polymerization of hydrated cement is investigated. The mi- crostructural compounds in the hardened cement hydration in oil wells is investigated. Cement pastes with water to binder ratio (w/b) of 0- ment pastes was investigated using X-ray diffraction (XRD) and nuclear magnetic resonance (NMR) methods

  12. Effects of aluminosilicate minerals in clay soil fractions on pore water hydroxide ion concentrations in soil/cement matrices 

    E-Print Network [OSTI]

    Cook, Evan Russell

    1998-01-01T23:59:59.000Z

    Ucement/waste matrices. Research described herein was undertaken 1) to ascertain the pH decrement in soil/cement matrices as a function of clay:cement ratio and 2) to develop a methodology to predict hydroxide ion concentrations in soil/cement matrices. To assess...

  13. Qualified Energy Conservation Bonds | Department of Energy

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

    description of qualified energy conservation bonds, including process and mechanics, case studies, utilization trends, barriers, and regulatory and legal issues. Author:...

  14. Tax-Exempt Bond Financing (Delaware)

    Broader source: Energy.gov [DOE]

    The Delaware Economic Development Authority provides tax-exempt bond financing for financial assistance to new or expanding businesses, governmental units and certain organizations that are exempt...

  15. Hydrogen Adsorption Induces Interlayer Carbon Bond Formation...

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

    Hydrogen Adsorption Induces Interlayer Carbon Bond Formation in Supported Few-Layer Graphene Friday, February 28, 2014 Among the allotropes of carbon, diamond has some of the most...

  16. Tax-Exempt Industrial Revenue Bonds (Kansas)

    Broader source: Energy.gov [DOE]

    Tax-Exempt Industrial Revenue Bonds are issued by cities and counties for the purchase, construction, improvement or remodeling of a facility for agricultural, commercial, hospital, industrial,...

  17. Nuclear reactor multiphysics via bond graph formalism

    E-Print Network [OSTI]

    Sosnovsky, Eugeny

    2014-01-01T23:59:59.000Z

    This work proposes a simple and effective approach to modeling nuclear reactor multiphysics problems using bond graphs. Conventional multiphysics simulation paradigms normally use operator splitting, which treats the ...

  18. Apparatus and method for measuring the expansion properties of a cement composition

    DOE Patents [OSTI]

    Spangle, Lloyd B. (Claremore, OK)

    1983-01-01T23:59:59.000Z

    An apparatus is disclosed which is useful for measuring the expansion properties of semi-solid materials which expand to a solid phase, upon curing, such as cement compositions. The apparatus includes a sleeve, preferably cylindrical, which has a vertical slit on one side, to allow the sleeve to expand. Mounted on the outside of the sleeve are several sets of pins, consisting of two pins each. The two pins in each set are located on opposite sides of the slit. In the test procedure, the sleeve is filled with wet cement, which is then cured to a solid. As the cement cures it causes the sleeve to expand. The actual expansion of the sleeve represents an expansion factor for the cement. This factor is calculated by measuring the distance across the pins of each set, when the sleeve is empty, and again after the cured cement expands the sleeve.

  19. Long-term modeling of glass waste in portland cement- and clay-based matrices

    SciTech Connect (OSTI)

    Stockman, H.W.; Nagy, K.L. [Sandia National Labs., Albuquerque, NM (United States); Morris, C.E. [Wollongong Univ., NSW (Australia). Dept. of Civil and Mining Engineering

    1995-12-01T23:59:59.000Z

    A set of ``templates`` was developed for modeling waste glass interactions with cement-based and clay-based matrices. The templates consist of a modified thermodynamic database, and input files for the EQ3/6 reaction path code, containing embedded rate models and compositions for waste glass, cement, and several pozzolanic materials. Significant modifications were made in the thermodynamic data for Th, Pb, Ra, Ba, cement phases, and aqueous silica species. It was found that the cement-containing matrices could increase glass corrosion rates by several orders of magnitude (over matrixless or clay matrix systems), but they also offered the lowest overall solubility for Pb, Ra, Th and U. Addition of pozzolans to cement decreased calculated glass corrosion rates by up to a factor of 30. It is shown that with current modeling capabilities, the ``affinity effect`` cannot be trusted to passivate glass if nuclei are available for precipitation of secondary phases that reduce silica activity.

  20. Inorganic Corrosion-Inhibitive Pigments for High-Temperature Alkali-activated Well Casing Foam Cement

    SciTech Connect (OSTI)

    Sugama, T. [Brookhaven National Lab. (BNL), Upton, NY (United States); Pyatina, T. [Brookhaven National Lab. (BNL), Upton, NY (United States)

    2014-11-14T23:59:59.000Z

    This study evaluates inorganic pigments for improving carbon steel (CS) brine-corrosion protection by the sodium metasilicate-activated calcium aluminate cement/Fly Ash blend at 300°C. Calcium borosilicate (CBS) and zinc phosphate, significantly improved CS corrosion-protection by decreasing cement’s permeability for corrosive ions and inhibiting anodic corrosion. An amorphous Na2O-Al2O3-SiO2-H2O phase tightly attached to CS surface formed at 300oC in CBS-modified cement pore solution. The corrosion rate of the CS covered with this phase was nearly 4-fold lower than in the case of nonmodified cement pore solution where the major phase formed on the surface of CS was crystalline analcime.

  1. Inorganic Corrosion-Inhibitive Pigments for High-Temperature Alkali-activated Well Casing Foam Cement

    SciTech Connect (OSTI)

    Sugama, T. [Brookhaven National Lab. (BNL), Upton, NY (United States); Pyatina, T. [Brookhaven National Lab. (BNL), Upton, NY (United States)

    2014-11-01T23:59:59.000Z

    This study evaluates inorganic pigments for improving carbon steel (CS) brine-corrosion protection by the sodium metasilicate-activated calcium aluminate cement/Fly Ash blend at 300°C. Calcium borosilicate (CBS) and zinc phosphate, significantly improved CS corrosion-protection by decreasing cement’s permeability for corrosive ions and inhibiting anodic corrosion. An amorphous Na2O-Al2O3-SiO2-H2O phase tightly attached to CS surface formed at 300oC in CBS-modified cement pore solution. The corrosion rate of the CS covered with this phase was nearly 4-fold lower than in the case of nonmodified cement pore solution where the major phase formed on the surface of CS was crystalline analcime.

  2. Dynamic Evolution of Cement Composition and Transport Properties under Conditions Relevant to Geological Carbon Sequestration

    SciTech Connect (OSTI)

    Brunet, Jean-Patrick Leopold; Li, Li; Karpyn, Zuleima T.; Strazisar, Brian; Bromhal Grant

    2013-08-01T23:59:59.000Z

    Assessing the possibility of CO{sub 2} leakage is one of the major challenges for geological carbon sequestration. Injected CO{sub 2} can react with wellbore cement, which can potentially change cement composition and transport properties. In this work, we develop a reactive transport model based on experimental observations to understand and predict the property evolution of cement in direct contact with CO{sub 2}-saturated brine under diffusion-controlled conditions. The model reproduced the observed zones of portlandite depletion and calcite formation. Cement alteration is initially fast and slows down at later times. This work also quantified the role of initial cement properties, in particular the ratio of the initial portlandite content to porosity (defined here as ?), in determining the evolution of cement properties. Portlandite-rich cement with large ? values results in a localized “sharp” reactive diffusive front characterized by calcite precipitation, leading to significant porosity reduction, which eventually clogs the pore space and prevents further acid penetration. Severe degradation occurs at the cement–brine interface with large ? values. This alteration increases effective permeability by orders of magnitude for fluids that preferentially flow through the degraded zone. The significant porosity decrease in the calcite zone also leads to orders of magnitude decrease in effective permeability, where fluids flow through the low-permeability calcite zone. The developed reactive transport model provides a valuable tool to link cement–CO{sub 2} reactions with the evolution of porosity and permeability. It can be used to quantify and predict long-term wellbore cement behavior and can facilitate the risk assessment associated with geological CO{sub 2} sequestration.

  3. Hydration and leaching characteristics of cement pastes made from electroplating sludge

    SciTech Connect (OSTI)

    Chen, Ying-Liang [Department of Environmental Engineering, National Cheng Kung University, No. 1, University Rd., Tainan City 70101, Taiwan (China); Sustainable Environment Research Center, National Cheng Kung University, No. 1, University Rd., Tainan City 70101, Taiwan (China); Ko, Ming-Sheng [Institute of Mineral Resources Engineering, National Taipei University of Technology, No. 1, Sec. 3, Chunghsiao E. Rd., Taipei City 10608, Taiwan (China); Lai, Yi-Chieh [Department of Bioenvironmental Engineering, Chung Yuan Christian University, No. 200, Chung-Pei Rd., Chung-Li 32023, Taiwan (China); Chang, Juu-En, E-mail: juuen@mail.ncku.edu.tw [Department of Environmental Engineering, National Cheng Kung University, No. 1, University Rd., Tainan City 70101, Taiwan (China); Sustainable Environment Research Center, National Cheng Kung University, No. 1, University Rd., Tainan City 70101, Taiwan (China)

    2011-06-15T23:59:59.000Z

    The purpose of this study was to investigate the hydration and leaching characteristics of the pastes of belite-rich cements made from electroplating sludge. The compressive strength of the pastes cured for 1, 3, 7, 28, and 90 days was determined, and the condensation of silicate anions in hydrates was examined with the {sup 29}Si nuclear magnetic resonance (NMR) technology. The leachabilities of the electroplating sludge and the hardened pastes were studied with the multiple toxicity characteristic leaching procedure (MTCLP) and the tank leaching test (NEN 7345), respectively. The results showed that the electroplating sludge continued to leach heavy metals, including nickel, copper, and zinc, and posed a serious threat to the environment. The belite-rich cement made from the electroplating sludge was abundant in hydraulic {beta}-dicalcium silicate, and it performed well with regard to compressive-strength development when properly blended with ordinary Portland cements. The blended cement containing up to 40% the belite-rich cement can still satisfy the compressive-strength requirements of ASTM standards, and the pastes cured for 90 days had comparable compressive strength to an ordinary Portland cement paste. It was also found that the later hydration reaction of the blended cements was relatively more active, and high fractions of belite-rich cement increased the chain length of silicate hydrates. In addition, by converting the sludge into belite-rich cements, the heavy metals became stable in the hardened cement pastes. This study thus indicates a viable alternative approach to dealing with heavy metal bearing wastes, and the resulting products show good compressive strength and heavy-metal stability.

  4. Hydration studies of calcium sulfoaluminate cements blended with fly ash

    SciTech Connect (OSTI)

    García-Maté, M.; De la Torre, A.G. [Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, 29071 Málaga (Spain)] [Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, 29071 Málaga (Spain); León-Reina, L. [Servicios Centrales de Apoyo a la Investigación, Universidad de Málaga, 29071 Málaga (Spain)] [Servicios Centrales de Apoyo a la Investigación, Universidad de Málaga, 29071 Málaga (Spain); Aranda, M.A.G. [Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, 29071 Málaga (Spain) [Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, 29071 Málaga (Spain); CELLS-Alba synchrotron, Carretera BP 1413, Km. 3.3, E-08290 Cerdanyola, Barcelona (Spain); Santacruz, I., E-mail: isantacruz@uma.es [Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, 29071 Málaga (Spain)

    2013-12-15T23:59:59.000Z

    The main objective of this work is to study the hydration and properties of calcium sulfoaluminate cement pastes blended with fly ash (FA) and the corresponding mortars at different hydration ages. Laboratory X-ray powder diffraction, rheological studies, thermal analysis, porosimetry and compressive strength measurements were performed. The analysis of the diffraction data by Rietveld method allowed quantifying crystalline phases and overall amorphous contents. The studied parameters were: i) FA content, 0, 15 and 30 wt.%; and ii) water addition, water-to-CSA mass ratio (w/CSA = 0.50 and 0.65), and water-to-binder mass ratio (w/b = 0.50). Finally, compressive strengths after 6 months of 0 and 15 wt.% FA [w/CSA = 0.50] mortars were similar: 73 ± 2 and 72 ± 3 MPa, respectively. This is justified by the filler effect of the FA as no strong evidences of reactivity of FA with CSA were observed. These results support the partial substitution of CSA cements with FA with the economic and environmental benefits.

  5. How Hydrogen Bond Redundancy Affects Protein Flexibility

    E-Print Network [OSTI]

    Naomi Fox; Filip Jagodzinski; Jeanne Hardy; Ileana Streinu

    Modeling a Protein as a BodyBarHinge and Associated Graph Main Question: Stability in proteins is the resistance to denaturation, or unfolding. A protein that is highly stable has a high tolerance to bonds breaking before unfolding; an unstable protein has less tolerance. In this study, we focus on the question, how many hydrogen bonds

  6. To appear in International Journal of Advances in Engineering Sciences and Applied Mathematics (2010). Critical Observations for the Evaluation of Cement Hydration Models

    E-Print Network [OSTI]

    Bentz, Dale P.

    2010-01-01T23:59:59.000Z

    (2010). Critical Observations for the Evaluation of Cement Hydration Models Dale P. Bentz Engineering of computer models for cement hydration and microstructure development, with an explicit consideration of experimental observations concerning the influence of water-to-cement ratio, cement particle size distribution

  7. Cement and Concrete Research, Vol. 42 (2), 404-409, 2012. Influence of Particle Size Distributions on Yield Stress and Viscosity of

    E-Print Network [OSTI]

    Bentz, Dale P.

    Cement and Concrete Research, Vol. 42 (2), 404-409, 2012. Influence of Particle Size Distributions on Yield Stress and Viscosity of Cement-Fly Ash Pastes Dale P. Bentz Chiara F. Ferraris Michael A. Galler.galler@nist.gov Phone: (301)975-5865 Andrew S. Hansen John M. Guynn Roman Cement LLC andrew@RomanCement.com Abstract

  8. Sponsors of CIEEDAC: Natural Resources Canada, Canadian Industry Program for Energy Conservation, Aluminium Industry Association, Canadian Petroleum Products Institute, Canadian Portland Cement Association, Canadian Pulp

    E-Print Network [OSTI]

    , Aluminium Industry Association, Canadian Petroleum Products Institute, Canadian Portland Cement Association

  9. 3-D Finite Element Analyses of the Egan Cavern Field

    SciTech Connect (OSTI)

    Klamerus, E.W.; Ehgartner, B.L.

    1999-02-01T23:59:59.000Z

    Three-dimensional finite element analyses were performed for the two gas-filled storage caverns at the Egan field, Jennings dome, Louisiana. The effects of cavern enlargement on surface subsidence, storage loss, and cavern stability were investigated. The finite element model simulated the leaching of caverns to 6 and 8 billion cubic feet (BCF) and examined their performance at various operating conditions. Operating pressures varied from 0.15 psi/ft to 0.9 psi/ft at the bottom of the lowest cemented casing. The analysis also examined the stability of the web or pillar of salt between the caverns under differential pressure loadings. The 50-year simulations were performed using JAC3D, a three dimensional finite element analysis code for nonlinear quasistatic solids. A damage criterion based on onset of dilatancy was used to evaluate cavern instability. Dilation results from the development of microfractures in salt and, hence, potential increases in permeability onset occurs well before large scale failure. The analyses predicted stable caverns throughout the 50-year period for the range of pressures investigated. Some localized salt damage was predicted near the bottom walls of the caverns if the caverns are operated at minimum pressure for long periods of time. Volumetric cavern closures over time due to creep were moderate to excessive depending on the salt creep properties and operating pressures. However, subsidence above the cavern field was small and should pose no problem, to surface facilities.

  10. Characterization of modified calcium-silicate cements exposed to acidic environment

    SciTech Connect (OSTI)

    Camilleri, Josette, E-mail: josette.camilleri@um.edu.mt

    2011-01-15T23:59:59.000Z

    Portland cement which is used as a binder in concrete in the construction industry has been developed into a biomaterial. It is marketed as mineral trioxide aggregate and is used in dentistry. This material has been reported to be very biocompatible and thus its use has diversified. The extended use of this material has led to developments of newer versions with improved physical properties. The aim of this study was to evaluate the effect of acidic environments found in the oral cavity on fast setting calcium silicate cements with improved physical properties using a combination of techniques. Two fast setting calcium silicate cements (CSA and CFA) and two cement composites (CSAG and CFAG) were assessed by subjecting the materials to lactic acid/sodium lactate buffer gel for a period of 28 days. At weekly intervals the materials were viewed under the tandem scanning confocal microscope (TSM), and scanning electron microscope (SEM). The two prototype cements exhibited changes in their internal chemistry with no changes in surface characteristics. Since the changes observed were mostly sub-surface evaluation of surface characteristics of cement may not be sufficient in the determination of chemical changes occurring. - Research Highlights: {yields} An acidic environment affects modified fast setting calcium silicate-based cements. {yields} No surface changes are observed in acidic environment. {yields} An acidic environment causes sub-surface changes in the material chemistry which are only visible in fractured specimens. {yields} A combination of techniques is necessary in order to evaluate the chemical changes occurring.

  11. Low-temperature ceramic radioactive waste form characteriztion of supercalcine-based monazite-cement composites

    SciTech Connect (OSTI)

    Roy, D.M.; Wakeley, L.D.; Atkinson, S.D.

    1980-04-18T23:59:59.000Z

    Simulated radioactive waste solidification by a lower temperature ceramic (cement) process is being investigated. The monazite component (simulated by NdPO/sub 4/) of supercalcine-ceramic has been solidified in cement and found to generate a solid form with low leachability. Several types of commercial cements and modifications thereof were used. No detectable release of Nd or P was found through characterizing the products of accelerated hydrothermal leaching at 473/sup 0/K (200/sup 0/C) and 30.4 MPa (300 bars) pressure.

  12. Improved method and composition for immobilization of waste in cement-based material

    DOE Patents [OSTI]

    Tallent, O.K.; Dodson, K.E.; McDaniel, E.W.

    1987-10-01T23:59:59.000Z

    A composition and method for fixation or immobilization of aqueous hazardous waste material in cement-based materials (grout) is disclosed. The amount of drainable water in the cured grout is reduced by the addition of an ionic aluminum compound to either the waste material or the mixture of waste material and dry-solid cement- based material. This reduction in drainable water in the cured grout obviates the need for large, expensive amounts of gelling clays in grout materials and also results in improved consistency and properties of these cement-based waste disposal materials.

  13. Characterization and modeling of the cemented sediment surrounding the Iulia Felix glass

    SciTech Connect (OSTI)

    Strachan, Denis M.; Crum, Jarrod V.; Ryan, Joseph V.; Silvestri, Alberta

    2014-02-28T23:59:59.000Z

    About 1800 years ago a Roman Corbita sunk off the coast of Italy carrying a barrel of glass cullet to the floor of the Adriatic Sea. Samples of glass cullet and the cemented surrounding sediment have been characterized and the reaction between the glass and the sea water saturated with respect to calcite and dolomite has been modeled. Results from characterization and modeling show that the cement phase surrounding the sediment grains is a high-Mg calcite. The origin of the cement phase is likely the reaction between the glass and the sea water to from a Mg-silicate, here modeled as sepiolite.

  14. Modeling Low-Barrier Hydrogen Bonds and Solution Effects

    E-Print Network [OSTI]

    Theel, Kelly

    2013-01-01T23:59:59.000Z

    Modeling low-barrier hydrogen bonds . . . . . 1.3 ModelingTypical hydrogen-bond 1-D potential energy surface . LBHB 1-representation of a Low Barrier Hydrogen Bond . . . . . . .

  15. sp2 Carbon-Hydrogen Bond (C-H) Functionalization

    E-Print Network [OSTI]

    Yotphan, Sirilata

    2010-01-01T23:59:59.000Z

    C-C) bonds from carbon-hydrogen (C-H) bonds in organicof them is unusually short. Hydrogen atoms were included insp 2 Carbon-Hydrogen Bond (C-H) Functionalization By

  16. Low Barrier Hydrogen Bonds in Acyclic Tertiary Diamines

    E-Print Network [OSTI]

    Khodagholian, Sevana

    2010-01-01T23:59:59.000Z

    In Search of a Low Barrier Hydrogen Bond in Proton Bridgedand J.A. Gerlt, “The Low Barrier Hydrogen Bond in EnzymaticShow That Low-Barrier Hydrogen Bonds do not Offer a

  17. Cement substitution by a combination of metakaolin and limestone

    SciTech Connect (OSTI)

    Antoni, M., E-mail: mathieu.antoni@epfl.ch [EPFL-STI-IMX-Laboratoires des Materiaux de Construction, Station12, CH-1015 Lausanne (Switzerland); Rossen, J. [EPFL-STI-IMX-Laboratoires des Materiaux de Construction, Station12, CH-1015 Lausanne (Switzerland)] [EPFL-STI-IMX-Laboratoires des Materiaux de Construction, Station12, CH-1015 Lausanne (Switzerland); Martirena, F. [CIDEM-UCLV, Universidad Las Villas, Santa Clara (Cuba)] [CIDEM-UCLV, Universidad Las Villas, Santa Clara (Cuba); Scrivener, K. [EPFL-STI-IMX-Laboratoires des Materiaux de Construction, Station12, CH-1015 Lausanne (Switzerland)] [EPFL-STI-IMX-Laboratoires des Materiaux de Construction, Station12, CH-1015 Lausanne (Switzerland)

    2012-12-15T23:59:59.000Z

    This study investigates the coupled substitution of metakaolin and limestone in Portland cement (PC). The mechanical properties were studied in mortars and the microstructural development in pastes by X-ray diffraction, thermogravimetry analysis, mercury intrusion porosimetry and isothermal calorimetry. We show that 45% of substitution by 30% of metakaolin and 15% of limestone gives better mechanical properties at 7 and 28 days than the 100% PC reference. Our results show that calcium carbonate reacts with alumina from the metakaolin, forming supplementary AFm phases and stabilizing ettringite. Using simple mass balance calculations derived from thermogravimetry results, we also present the thermodynamic simulation for the system, which agrees fairly well with the experimental observations. It is shown that gypsum addition should be carefully balanced when using calcined clays because it considerably influences the early age strength by controlling the very rapid reaction of aluminates.

  18. Carbon dioxide capture from a cement manufacturing process

    DOE Patents [OSTI]

    Blount, Gerald C. (North Augusta, SC); Falta, Ronald W. (Seneca, SC); Siddall, Alvin A. (Aiken, SC)

    2011-07-12T23:59:59.000Z

    A process of manufacturing cement clinker is provided in which a clean supply of CO.sub.2 gas may be captured. The process also involves using an open loop conversion of CaO/MgO from a calciner to capture CO.sub.2 from combustion flue gases thereby forming CaCO.sub.3/CaMg(CO.sub.3).sub.2. The CaCO.sub.3/CaMg(CO.sub.3).sub.2 is then returned to the calciner where CO.sub.2 gas is evolved. The evolved CO.sub.2 gas, along with other evolved CO.sub.2 gases from the calciner are removed from the calciner. The reactants (CaO/MgO) are feed to a high temperature calciner for control of the clinker production composition.

  19. In What Form is Lime Present in Portland Cement

    E-Print Network [OSTI]

    Wright, Claude W.

    1910-01-01T23:59:59.000Z

    to obtain Si02.33a0, In his conclusions Hebuffat does not consider it of importance whether alit consists of pure Si02.3CaO or a crystalline compound of Si02.2CaO with 3a0 and an aluminate. He says the aluminate in Portland dement can­ not be Al 203.30a... Chemist follows: Si0 2, 23.20: A120 3, 8.10: P e 2 0 3 , 2.71: MgO, 1.00 S 0 3 > 1.20: CaO, 63.50. Total 100.71. On the basis of the calculation for uncombined lime given in a previous part of this paper, this cement con­ tains ? per cent...

  20. Process Of Bonding Copper And Tungsten

    DOE Patents [OSTI]

    Slattery, Kevin T. (St. Charles, MO); Driemeyer, Daniel E. (Manchester, MO); Davis, John W. (Ballwin, MO)

    2000-07-18T23:59:59.000Z

    Process for bonding a copper substrate to a tungsten substrate by providing a thin metallic adhesion promoting film bonded to a tungsten substrate and a functionally graded material (FGM) interlayer bonding the thin metallic adhesion promoting film to the copper substrate. The FGM interlayer is formed by sintering a stack of individual copper and tungsten powder blend layers having progressively higher copper content/tungsten content, by volume, ratio values in successive powder blend layers in a lineal direction extending from the tungsten substrate towards the copper substrate. The resulting copper to tungsten joint well accommodates the difference in the coefficient of thermal expansion of the materials.

  1. Analysing

    Office of Scientific and Technical Information (OSTI)

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem Not Found Item Not Found The itemAIR SEPARATION BYAbrasion andArticle) |

  2. Qualified Energy Conservation Bonds (QECBs) & New Clean Renewable...

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

    presentation overview of qualified energy conservation bond and new clean renewable energy bonds, including characteristics, mechanics, allocated volume, and other information....

  3. Hydrogen-bond acidic functionalized carbon nanotubes (CNTs) with...

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

    Hydrogen-bond acidic functionalized carbon nanotubes (CNTs) with covalently-bound hexafluoroisopropanol groups. Hydrogen-bond acidic functionalized carbon nanotubes (CNTs) with...

  4. Three Hydrogen Bond Donor Catalysts: Oxyanion Hole Mimics and...

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

    Hydrogen Bond Donor Catalysts: Oxyanion Hole Mimics and Transition State Analogues. Three Hydrogen Bond Donor Catalysts: Oxyanion Hole Mimics and Transition State Analogues....

  5. A Preorganized Hydrogen Bond Network and Its Effect on Anion...

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

    Preorganized Hydrogen Bond Network and Its Effect on Anion Stability. A Preorganized Hydrogen Bond Network and Its Effect on Anion Stability. Abstract: Rigid tricyclic locked in...

  6. Hydrogen-Bond Acidic Polymers for Chemical Vapor Sensing. | EMSL

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

    Acidic Polymers for Chemical Vapor Sensing. Hydrogen-Bond Acidic Polymers for Chemical Vapor Sensing. Abstract: A review with 171 references. Hydrogen-bond acidic polymers for...

  7. Local Option- Industrial Facilities and Development Bonds (Utah)

    Broader source: Energy.gov [DOE]

    Under the Utah Industrial Facilities and Development Act, counties, municipalities, and state universities in Utah may issue Industrial Revenue Bonds (IRBs) or Industrial Development Bonds (IDBs)...

  8. Qualified Energy Conservation Bonds (QECBs?) & New Clean Renewable...

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

    Qualified Energy Conservation Bonds ("QECBs") & New Clean Renewable Energy Bonds ("New CREBs") Slide 1 DISCLAIMER: The information in this presentation is for informational...

  9. Covalency in Metal-Oxygen Multiple Bonds Evaluated Using Oxygen...

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

    Multiple Bonds Evaluated Using Oxygen K-edge Spectroscopy and Electronic Structure Theory . Covalency in Metal-Oxygen Multiple Bonds Evaluated Using Oxygen K-edge Spectroscopy...

  10. Detecting and modeling cement failure in high pressure/ high temperature wells using finite-element method

    E-Print Network [OSTI]

    Shahri, Mehdi Abbaszadeh

    2006-04-12T23:59:59.000Z

    conditions and are investigated simultaneously to more accurately predict cement failure. The results of this study show the relevant dependency of stress principles with temperature and pressure. These results clarify the deformation caused by any...

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

    E-Print Network [OSTI]

    Hasanbeigi, Ali

    2013-01-01T23:59:59.000Z

    24 3.5. Emerging Carbon Capture Technologies for the Cement27 3.5.2. Post-combustion Carbon Capture Using AbsorptionGmbH (ECRA), 2007. Carbon Capture Technology - Options and

  12. Non-Linear Drying Diffusion and Viscoelastic Drying Shrinkage Modeling in Hardened Cement Pastes

    E-Print Network [OSTI]

    Leung, Chin K.

    2010-07-14T23:59:59.000Z

    modeling with an average diffusion coefficient and with determined viscoelastic parameters from creep tests agreed well compared to the shrinkage data from experiments, indicating that drying shrinkage of cement paste may be considered as a poroviscoelastic...

  13. Grinding of cement clinkers : linking multi-scale fracture properties to system chemistry, mineralogy and microstructure

    E-Print Network [OSTI]

    Wilson, William, S.M. Massachusetts Institute of Technology

    2013-01-01T23:59:59.000Z

    Growing environmental concerns encourage the cement industry to improve its environmental performance, which in turn renews the interest in clinker grinding efficiency. Current knowledge on clinker grinding was built over ...

  14. Release of U(VI) from spent biosorbent immobilized in cement concrete blocks

    SciTech Connect (OSTI)

    Venkobachar, C.; Iyengar, L.; Mishra, U.K.; Chauhan, M.S. [Indian Inst. of Tech., Kanpur (India)] [Indian Inst. of Tech., Kanpur (India)

    1995-12-01T23:59:59.000Z

    This paper deals with cementation as the method for the disposal of spent biosorbent, Ganoderma lucidum (a wood rotting macrofungi) after it is used for the removal of Uranium. Results on the uranium release during the curing of cement-concrete (CC) blocks indicated that placing the spent sorbent at the center of the blocks during their casting yields better immobilization of uranium as compared to the homogeneous mixing of the spent sorbent with the cement. Short term leach tests indicated that the uranium release was negligible in simulated seawater, 1.8% in 0.2 N sodium carbonate and 6.0% in 0.2 N HCl. The latter two leachates were used to represent the extreme environmental conditions. It was observed that the presence of the spent biosorbent up to 5% by weight did not affect the compressive strength of CC blocks. Thus cementation technique is suitable for the immobilization of uranium loaded biosorbent for its ultimate disposal.

  15. Microsoft Word - NETL-TRS-2-2013_Foamed Cement_20140124.docx

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

    Foamed Cement 1 ABSTRACT NETL researchers have produced the first high-resolution X-ray computed tomography (CT) three-dimensional (3-D) images of atmospheric-generated...

  16. Detecting and modeling cement failure in high pressure/ high temperature wells using finite-element method 

    E-Print Network [OSTI]

    Shahri, Mehdi Abbaszadeh

    2006-04-12T23:59:59.000Z

    A successful cement job results in complete zonal isolation while saving time and money. To achieve these goals, various factors such as well security, casing centralization, effective mud removal, and gas migration must be considered in the design...

  17. Synthesis and Characterization of High Temperature Cement-Based Hydroceramic Materials 

    E-Print Network [OSTI]

    Kyritsis, Konstantinos

    2009-01-01T23:59:59.000Z

    Cement-based materials are of importance in the construction of geothermal wells and high-temperature oil and gas wells. These materials fill the annulus between the well casing and the rock forming a protective layer, ...

  18. Effect of spatial variability on the bearing capacity of cement-treated ground

    E-Print Network [OSTI]

    Kasama, Kiyonobu

    This paper presents a reliability assessment for the undrained bearing capacity of a surface strip foundation based on the results of a probabilistic study in which the shear strength and unit weight of cement-treated ...

  19. Effects of microorganisms growth on the long-term stability of cement and bitumen

    SciTech Connect (OSTI)

    Libert, M.F.; Sellier, R.; Jouquet, G.; Trescinski, M.; Spor, H. [Nuclear Research Center of Cadarache, St.Paul-Lez-Durance (France)

    1993-12-31T23:59:59.000Z

    Cement is used as a coating matrix for nuclear waste or as an engineered barrier of waste repositories situated in geological formations. The effect of mineral acids excreted by bacteria (Thiobacillus) or organic acids produced by fungi, on the biodegradation of cement is discussed. Organic acids are quantitatively and qualitatively determined during growth of fungi over a two-year period. Even with high pH conditions, pH of the cement {approx} 11, growth of microorganisms occurs. Biodeterioration of cement is expressed in terms of bioleaching velocity of calcium and is observed by electron microscopy. Bitumen is commonly used as a matrix for the long-term storage of radioactive wastes. Long-term biodegrability of bitumen is discussed as a function of its chemical composition and various studied microorganisms.

  20. Evaluation of Life-Cycle Assessment Studies of Chinese Cement Production: Challenges and Opportunities

    E-Print Network [OSTI]

    Lu, Hongyou

    2010-01-01T23:59:59.000Z

    Environmental Science, 2008. Marceau, M. , Nisbet, M. , andet al. 2004; Kelly, 1994; Marceau et al. 2006; Navia et al.cement-related products (Marceau, 2006). Last but not least,

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

    E-Print Network [OSTI]

    Hasanbeigi, Ali

    2013-01-01T23:59:59.000Z

    Hilger, J. 2003. Combined Utilization of Oil Shale Energyand Oil Shale Minerals within the Production of Cement andOther Hydraulic Minerals. Oil Shale, Vol. 20, No. 3, pp.

  2. Lattice Boltzmann simulations of the permeability and capillary adsorption of cement model microstructures

    SciTech Connect (OSTI)

    Zalzale, M. [Laboratory of Construction Materials, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne (Switzerland)] [Laboratory of Construction Materials, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne (Switzerland); McDonald, P.J., E-mail: p.mcdonald@surrey.ac.uk [Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH (United Kingdom)

    2012-12-15T23:59:59.000Z

    The lattice Boltzmann method is used to investigate the permeability of microstructures of cement pastes generated using the numerical models CEMHYD3D (Bentz, 1997) and {mu}IC (Bishnoi and Scrivener, 2009). Results are reported as a function of paste water-to-cement ratio and degree of hydration. The permeability decreases with increasing hydration and decreasing water-to-cement ratio in agreement with experiment. However the permeability is larger than the experimental data recorded using beam bending methods (Vichit-Vadakan and Scherer, 2002). Notwithstanding, the lattice Boltzmann results compare favourably with alternate numerical methods of permeability calculation for cement model microstructures. In addition, we show early results for the liquid/vapour capillary adsorption and desorption isotherms in the same model {mu}IC structures. The broad features of the experimental capillary porosity isotherm are reproduced, although further work is required to adequately parameterise the model.

  3. Portland cement mortar modified with latex and fiber glass for thin shell construction

    E-Print Network [OSTI]

    Raymond, Jewell Duane

    1963-01-01T23:59:59.000Z

    and materials required for the elaborate formwork. Building codes are also in need of revision to include provisions for thin shell construction. The objective of this study was to investigate the possible potential use of portland cement mortar modified...

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

    E-Print Network [OSTI]

    Shrestha, Pradhumna Babu

    1999-01-01T23:59:59.000Z

    This study relates the assessment of durability to ''early-opening-to-traffic'' (EOT) portland cement concrete (PCC). Several factors were identified relative to the performance of EOT PCC. Each of these factors was considered in terms of freeze...

  5. Modeling of the Aging Viscoelastic Properties of Cement Paste Using Computational Methods 

    E-Print Network [OSTI]

    Li, Xiaodan

    2012-07-16T23:59:59.000Z

    computational model using finite element method to predict the viscoelastic behavior of cement paste, and using this model, virtual tests can be carried out to improve understanding of the mechanisms of viscoelastic behavior. The primary finding from...

  6. Analysis of Energy-Efficiency Opportunities for the Cement Industry in Shandong Province, China

    E-Print Network [OSTI]

    Price, Lynn

    2010-01-01T23:59:59.000Z

    Potential (GWh) CO2 Emission Reduction Potential (kt CO 2 )Fuel Savings (TJ) CO2 Emission Reduction Potential (kt COPotentials and CO2 Emission Reductions in 16 Studied Cement

  7. Potential Energy Savings and CO2 Emissions Reduction of China's Cement Industry

    E-Print Network [OSTI]

    Ke, Jing

    2013-01-01T23:59:59.000Z

    Energy Savings and CO2 Emissions Reduction of China’s CementEnergy Savings and CO2 Emissions Reduction of China’s Cementenergy savings and CO2 emission reduction potentials are

  8. The Ohio Enterprise Bond Fund (Ohio)

    Broader source: Energy.gov [DOE]

    The Ohio Enterprise Bond Fund (OEBF) was created in 1988 to promote economic development, create and retain quality jobs and assist governmental operations. The program enables non-profit and for...

  9. Industrial Revenue Bond Program (District of Columbia)

    Broader source: Energy.gov [DOE]

    The District provides below market bond financing to lower the costs of borrowing for qualified capital construction and renovation projects. The program is available to non-profits, institutions,...

  10. Corporate bond repurchases and earnings management

    E-Print Network [OSTI]

    Lemayian, Zawadi Rehema

    2013-01-01T23:59:59.000Z

    This paper investigates whether earnings management incentives are associated with gains/losses recognized when firms repurchase bonds. The research question is motivated by the inclusion of these gains/losses in firms' ...

  11. Effects of composition and exposure on the solar reflectance of Portland cement concrete

    SciTech Connect (OSTI)

    Levinson, Ronnen; Akbari, Hashem

    2001-12-21T23:59:59.000Z

    Increasing the solar reflectance (albedo) of a paved surface keeps it cooler in the sun, reducing convection of heat from pavement to air and thereby decreasing the ambient air temperature. Simulations of the influence of pavement albedo on air temperature in Los Angeles predict that increasing the albedo of 1,250 km2 of pavement by 0.25 would save cooling energy worth $15M yr-1, and reduce smog-related medical and lost-work expenses by $76M yr-1. Most sidewalks and a small fraction of roads and parking areas are paved with portland cement concrete, which can be made quite reflective through suitable choice of cement and aggregate. Variations with composition and environmental exposure of the albedos of portland cement concrete pavements were investigated through laboratory fabrication and exposure of 32 mixes of concrete. Twenty-four mixes yielded substandard, ''rough'' concretes due to high, unmet aggregate water demand. The albedos of the remaining eight ''smooth'' concrete mixes ranged from 0.41 to 0.77 (mean 0.59). Simulated weathering, soiling, and abrasion each reduced average concrete albedo (mean decreases 0.06, 0.05, and 0.19, respectively), though some samples became slightly more reflective through weathering or soiling. Simulated rain (wetting) strongly depressed the albedos of concretes (mean decrease 0.23) until their surfaces were dried. Concrete albedo grew as the cement hydration reaction progressed (mean increase 0.08), but stabilized within six weeks of casting. White-cement concretes were on average significantly more reflective than gray-cement concretes. The albedo of the most-reflective white-cement concrete was 0.18 to 0.39 higher than that of the most-reflective gray-cement concrete, depending on state of exposure. Concrete albedo generally correlated with cement albedo and sand albedo, and, after abrasion, with rock albedo. Cement albedo had a disproportionately strong influence on the reflectance of concrete. Efflorescence and surface carbonation whitened some gray-cement mixes.

  12. Method of bonding metals to ceramics

    DOE Patents [OSTI]

    Maroni, V.A.

    1991-04-23T23:59:59.000Z

    A ceramic or glass having a thin layer of silver, gold or alloys thereof at the surface thereof is disclosed. A first metal is bonded to the thin layer and a second metal is bonded to the first metal. The first metal is selected from the class consisting of In, Ga, Sn, Bi, Zn, Cd, Pb, Tl and alloys thereof, and the second metal is selected from the class consisting of Cu, Al, Pb, Au and alloys thereof. 3 figures.

  13. The use of Devonian oil shales in the production of portland cement

    SciTech Connect (OSTI)

    Schultz, C.W.; Lamont, W.E. [Alabama Univ., University, AL (United States); Daniel, J. [Lafarge Corp., Alpena, MI (United States)

    1991-12-31T23:59:59.000Z

    The Lafarge Corporation operates a cement plant at Alpena, Michigan in which Antrim shale, a Devonian oil shale, is used as part of the raw material mix. Using this precedent the authors examine the conditions and extent to which spent shale might be utilized in cement production. They conclude that the potential is limited in size and location but could provide substantial benefit to an oil shale operation meeting these criteria.

  14. The physical and chemical aspects of the leaching behavior of metals from portland cement

    E-Print Network [OSTI]

    Davis, Ricardo Corye

    1990-01-01T23:59:59.000Z

    THE PHYSICAL AND CHEMICAL ASPECTS OF THE LEACHING BEHAVIOR OF METALS FROM PORTLAND CEMENT A Thesis by RICARDO CORYE DAVIS Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 1990 Major Subject: Chemistry THE PHYSICAL AND CHEMICAL ASPECTS OF THE LEACHING BEHAVIOR OF METALS FROM PORTLAND CEMENT A Thesis by RICARDO CORYE DAVIS Approved as to style and content by: David L. Cocke (Co...

  15. Determining the effective diffusivity of ions in hazardous wastes solidified by portland cement

    E-Print Network [OSTI]

    Taffinder, Glen Gregory

    1991-01-01T23:59:59.000Z

    DETERMINING THE EFFECTIVE DIFFUSIVITY OF TONS IN HAZARDOUS WASTES SOLIDIFIED BY PORTLAND CEMENT A Thesis by GLEN GREGORY TAFFINDER 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 May 1991 Major Subject: Civil Engineering DETERMINING THE EFFECTIVE DIFFUSIVITY OF TONS IN HAZARDOUS WASTES SOLIDIFIED BY PORTLAND CEMENT A Thesis by GLEN GREGORY TAFFINDER Approved as to scyle and content by: Bill...

  16. Preliminary non-destructive assessment of moisture content, hydration and dielectric properties of Portland cement concrete

    E-Print Network [OSTI]

    Avelar Lezama, Ivan

    2007-04-25T23:59:59.000Z

    PRELIMINARY NON-DESTRUCTIVE ASSESSMENT OF MOISTURE CONTENT, HYDRATION AND DIELECTRIC PROPERTIES OF PORTLAND CEMENT CONCRETE A Thesis by IVAN AVELAR LEZAMA Submitted to the Office of Graduate Studies of Texas A... AND DIELECTRIC PROPERTIES OF PORTLAND CEMENT CONCRETE A Thesis by IVAN AVELAR LEZAMA 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...

  17. Percutaneous Extraction of Cement Leakage After Vertebroplasty Under CT and Fluoroscopy Guidance: A New Technique

    SciTech Connect (OSTI)

    Amoretti, Nicolas, E-mail: amorettinicolas@yahoo.fr; Huwart, Laurent, E-mail: huwart.laurent@wanadoo.fr [Centre Hospitalo-Universitaire de Nice, Department of Radiology (France)

    2012-12-15T23:59:59.000Z

    Purpose: We report a new minimally invasive technique of extraction of cement leakage following percutaneous vertebroplasty in adults. Methods: Seven adult patients (five women, two men; mean age: 81 years) treated for vertebral compression fractures by percutaneous vertebroplasty had cement leakage into perivertebral soft tissues along the needle route. Immediately after vertebroplasty, the procedure of extraction was performed under computed tomography (CT) and fluoroscopy guidance: a Chiba needle was first inserted using the same route as the vertebroplasty until contact was obtained with the cement fragment. This needle was then used as a guide for an 11-gauge Trocar t'am (Thiebaud, France). After needle withdrawal, a 13-gauge endoscopy clamp was inserted through the cannula to extract the cement fragments. The whole procedure was performed under local anesthesia. Results: In each patient, all cement fragments were withdrawn within 10 min, without complication. Conclusions: This report suggests that this CT- and fluoroscopy-guided percutaneous technique of extraction could reduce the rate of cement leakage-related complications.

  18. Association of macroscopic laboratory testing and micromechanics modelling for the evaluation of the poroelastic parameters of a hardened cement paste

    E-Print Network [OSTI]

    Ghabezloo, Siavash

    2010-01-01T23:59:59.000Z

    The results of a macro-scale experimental study performed on a hardened class G cement paste [Ghabezloo et al. (2008) Cem. Con. Res. (38) 1424-1437] are used in association with the micromechanics modelling and homogenization technique for evaluation of the complete set of poroelastic parameters of the material. The experimental study consisted in drained, undrained and unjacketed isotropic compression tests. Analysis of the experimental results revealed that the active porosity of the studied cement paste is smaller than its total porosity. A multi-scale homogenization model, calibrated on the experimental results, is used to extrapolate the poroelastic parameters to cement pastes prepared with different water-to-cement ratio. The notion of cement paste active porosity is discussed and the poroelastic parameters of hardened cement paste for an ideal, perfectly drained condition are evaluated using the homogenization model.

  19. Association of macroscopic laboratory testing and micromechanics modelling for the evaluation of the poroelastic parameters of a hardened cement paste

    E-Print Network [OSTI]

    Siavash Ghabezloo

    2010-06-25T23:59:59.000Z

    The results of a macro-scale experimental study performed on a hardened class G cement paste [Ghabezloo et al. (2008) Cem. Con. Res. (38) 1424-1437] are used in association with the micromechanics modelling and homogenization technique for evaluation of the complete set of poroelastic parameters of the material. The experimental study consisted in drained, undrained and unjacketed isotropic compression tests. Analysis of the experimental results revealed that the active porosity of the studied cement paste is smaller than its total porosity. A multi-scale homogenization model, calibrated on the experimental results, is used to extrapolate the poroelastic parameters to cement pastes prepared with different water-to-cement ratio. The notion of cement paste active porosity is discussed and the poroelastic parameters of hardened cement paste for an ideal, perfectly drained condition are evaluated using the homogenization model.

  20. July 18, 2012 Using Qualified Energy Conservation Bonds for Public

    E-Print Network [OSTI]

    July 18, 2012 Using Qualified Energy Conservation Bonds for Public Building Upgrades: Reducing Energy Bills in the City of Philadelphia Qualified Energy Conservation Bonds (QECBs) are federally Energy Conservation Bond (QECB) is a bond that enables qualified state, tribal and local government

  1. Qualified Energy Conservation Bond State-by-State Summary Tables

    Broader source: Energy.gov [DOE]

    Provides a list of qualified energy conservation bond state summary tables. Author: Energy Programs Consortium

  2. Bone-cement interface micromechanical model under cyclic loading J.A. Sanz-Herrera1, a

    E-Print Network [OSTI]

    Ariza Moreno, Pilar

    Bone-cement interface micromechanical model under cyclic loading J.A. Sanz-Herrera1, a , H descubrimientos s/n 41092 Seville (Spain) a jsanz@us.es, b helgaem@gmail.com, c mpariza@us.es Keywords: Bone-cement of the last XX century. Normally, implant is fixed to bone by means of a polymer material known as bone cement

  3. Comparative Analysis of Cement and Lateralite on the Engineering Properties of Niger Delta Soils for Pavement Construction

    E-Print Network [OSTI]

    Alayaki, F. M.; Al-Tabbaa, A.; Meshida, E. A.; Ayotamuno, M. J.

    2015-05-13T23:59:59.000Z

    .BJAST.2015.254 ISSN: 2231-0843 SCIENCEDOMAIN international www.sciencedomain.org Comparative Analysis of Cement and Lateralite on the Engineering Properties of Niger Delta Soils for Pavement Construction F. M. Alayaki1*, A. Al... :1 and then stabilize with cement. However high strength reduction of about 40% was noted when the stabilized mixture was soaked in water even with as much as 10% cement, thus suggested the protection of the pavement from water ingress. [5] Noted...

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

    E-Print Network [OSTI]

    Hasanbeigi, Ali

    2014-01-01T23:59:59.000Z

    GmbH (ECRA), 2007. Carbon Capture Technology - Options and2.5. Emerging Carbon Capture Technologies for the Cementof emerging carbon capture technologies for the cement

  5. Energy Efficiency Improvement and Cost Saving Opportunities for Cement Making. An ENERGY STAR Guide for Energy and Plant Managers

    E-Print Network [OSTI]

    Worrell, Ernst

    2008-01-01T23:59:59.000Z

    The overall energy consumption trend in the U.S. cementEnergy Use and Carbon Dioxide Emissions Trends Energy consumption

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

    E-Print Network [OSTI]

    Hasanbeigi, A.; Price, L.; Lin, E.

    2012-01-01T23:59:59.000Z

    is to increase the amounts of elements other than Portland cement in blended cement products. However, increased use of other elements can result in a final product that is slow to develop compressive strength. One solution that has been researched....4.1. Cement/Concrete Based on Fly Ash and Recycled Materials Fly ash is a byproduct of coal burning that can have cementitious characteristics similar to those of Portland cement. The binding properties of fly ash depend on the type of coal burned...

  7. The Ties That Bond: Re-Examining the Relationship between Facebook Use and Bonding Social Capital

    E-Print Network [OSTI]

    Michigan, University of

    The Ties That Bond: Re-Examining the Relationship between Facebook Use and Bonding Social Capital established a positive relationship between measures of Facebook use and perceptions of social capital. Like other social network sites, Facebook is especially well-positioned to enhance users' bridging social

  8. Catalysis of Protein Disulfide Bond Isomerization in a Homogeneous Substrate Elizabeth A. Kersteen,, Seth R. Barrows, and Ronald T. Raines*,,|

    E-Print Network [OSTI]

    Raines, Ronald T.

    Catalysis of Protein Disulfide Bond Isomerization in a Homogeneous Substrate Elizabeth A. Kersteen in these assays are, however, heterogeneous, which complicates mechanistic analyses. Here, we report the first use this continuous assay to analyze catalysis by wild-type human PDI and a variant in which the C

  9. Hydrogen Bond Networks: Structure and Evolution after Hydrogen Bond Breaking John B. Asbury, Tobias Steinel, and M. D. Fayer*

    E-Print Network [OSTI]

    Fayer, Michael D.

    Hydrogen Bond Networks: Structure and Evolution after Hydrogen Bond Breaking John B. Asbury, TobiasVed: September 1, 2003; In Final Form: December 18, 2003 The nature of hydrogen bonding networks following hydrogen bond breaking is investigated using vibrational echo correlation spectroscopy of the hydroxyl

  10. Shirzadi et al. Surface and Interface Analysis 2001; 31:609-618 Interface evolution and bond strength when diffusion bonding

    E-Print Network [OSTI]

    Cambridge, University of

    strength when diffusion bonding materials with stable oxide films A.A. Shirzadi* , H. Assadi and E morphologies and strengths of aluminium diffusion bonds are reviewed. Previous approaches, proposed to overcome for both solid-state diffusion bonding and conventional transient liquid phase (TLP) diffusion bonding. Non

  11. Permeability of consolidated incinerator facility wastes stabilized with portland cement

    SciTech Connect (OSTI)

    Walker, B.W.

    2000-04-19T23:59:59.000Z

    The Consolidated Incinerator Facility (CIF) at the Savannah River Site (SRS) burns low-level radioactive wastes and mixed wastes as a method of treatment and volume reduction. The CIF generates secondary waste, which consists of ash and offgas scrubber solution. Currently the ash is stabilized/solidified in the Ashcrete process. The scrubber solution (blowdown) is sent to the SRS Effluent Treatment Facility (ETF) for treatment as wastewater. In the past, the scrubber solution was also stabilized/solidified in the Ashcrete process as blowcrete, and will continue to be treated this way for listed waste burns and scrubber solutions that do not meet the ETF Waste Acceptance Criteria (WAC). The disposal plan for Ashcrete and special case blowcrete is to bury these containerized waste forms in shallow unlined trenches in E-Area. The WAC for intimately mixed, cement-based wasteforms intended for direct disposal specifies limits on compressive strength and permeability. Simulated waste and actual CIF ash and scrubber solution were mixed in the laboratory and cast into wasteforms for testing. Test results and related waste disposal consequences are given in this report.

  12. Evaluation of cement production using a pressurized fluidized-bed combustor

    SciTech Connect (OSTI)

    DeLallo, M.; Eshbach, R.

    1994-01-01T23:59:59.000Z

    There are several primary conclusions which can be reached and used to define research required in establishing the feasibility of using PFBC-derived materials as cement feedstock. 1. With appropriate blending almost any material containing the required cement-making materials can be utilized to manufacture cement. However, extensive blending with multiple materials or the use of ash in relatively small quantities would compromise the worth of this concept. 2. The composition of a potential feedstock must be considered not only with respect to the presence of required materials, but just as significantly, with respect to the presence and concentration of known deleterious materials. 3. The processing costs for rendering the feedstock into an acceptable composition and the energy costs associated with both processing and burning must be considered. It should be noted that the cost of energy to produce cement, expressed as a percentage of the price of the product is higher than for any other major industrial product. Energy consumption is, therefore, a major issue. 4. The need for conformance to environmental regulations has a profound effect on the cement industry since waste materials can neither be discharged to the atmosphere or be shipped to a landfill. 5. Fifth, the need for achieving uniformity in the composition of the cement is critical to controlling its quality. Unfortunately, certain materials in very small concentrations have the capability to affect the rate and extent to which the cementitious compound in portland cement are able to form. Particularly critical are variations in the ash, the sulfur content of the coal or the amount and composition of the stack dust returned to the kiln.

  13. COMMISSION SCENARIO ANALYSES OF CALIFORNIA'S

    E-Print Network [OSTI]

    PLANT RETIREMENT AND REPLACEMENT COSTS APPENDIX C: IMPACTS ON NATURAL GAS MARKET PRICES OF LOW DEMAND FOR GAS AS A POWER GENERATION FUEL IN THE WEST APPENDIX D: FURTHER MARKET ANALYSES FOR NATURAL GAS #12: PRELIMINARY RESULTS FOR THE 2007 INTEGRATED ENERGY POLICY REPORT SECOND ADDENDUM APPENDICES Staff Draft Report

  14. Bonded ultrasonic transducer and method for making

    DOE Patents [OSTI]

    Dixon, Raymond D. (Los Alamos, NM); Roe, Lawrence H. (Los Alamos, NM); Migliori, Albert (Santa Fe, NM)

    1995-01-01T23:59:59.000Z

    An ultrasonic transducer is formed as a diffusion bonded assembly of piezoelectric crystal, backing material, and, optionally, a ceramic wear surface. The mating surfaces of each component are silver films that are diffusion bonded together under the application of pressure and heat. Each mating surface may also be coated with a reactive metal, such as hafnium, to increase the adhesion of the silver films to the component surfaces. Only thin silver films are deposited, e.g., a thickness of about 0.00635 mm, to form a substantially non-compliant bond between surfaces. The resulting transducer assembly is substantially free of self-resonances over normal operating ranges for taking resonant ultrasound measurements.

  15. Process Of Bonding Copper And Tungsten

    DOE Patents [OSTI]

    Slattery, Kevin T. (St. Charles, MO); Driemeyer, Daniel E. (Manchester, MO)

    1999-11-23T23:59:59.000Z

    Process for bonding a copper substrate to a tungsten substrate by providing a thin metallic adhesion promoting film bonded to a tungsten substrate and a functionally graded material (FGM) interlayer bonding the thin metallic adhesion promoting film to the copper substrate. The FGM interlayer is formed by thermal plasma spraying mixtures of copper powder and tungsten powder in a varied blending ratio such that the blending ratio of the copper powder and the tungsten powder that is fed to a plasma torch is intermittently adjusted to provide progressively higher copper content/tungsten content, by volume, ratio values in the interlayer in a lineal direction extending from the tungsten substrate towards the copper substrate. The resulting copper to tungsten joint well accommodates the difference in the coefficient of thermal expansion of the materials.

  16. Alkyl Chlorides as Hydrogen Bond Acceptors

    SciTech Connect (OSTI)

    Nadas, Janos I [ORNL; Vukovic, Sinisa [ORNL; Hay, Benjamin [ORNL

    2012-01-01T23:59:59.000Z

    To gain an understanding of the role of an alkyl chloride as a hydrogen bond acceptor, geometries and interaction energies were calculated at the MP2/aug-cc-pVDZ level of theory for complexes between ethyl chloride and representative hydrogen donor groups. The results establish that these donors, which include hydrogen cyanide, methanol, nitrobenzene, pyrrole, acetamide, and N-methylurea, form X-H {hor_ellipsis} Cl hydrogen bonds (X = C, N, O) of weak to moderate strength, with {Delta}E values ranging from -2.8 to -5.3 kcal/mol.

  17. Adhesive bonding using variable frequency microwave energy

    DOE Patents [OSTI]

    Lauf, Robert J. (Oak Ridge, TN); McMillan, April D. (Knoxville, TN); Paulauskas, Felix L. (Oak Ridge, TN); Fathi, Zakaryae (Cary, NC); Wei, Jianghua (Raleigh, NC)

    1998-01-01T23:59:59.000Z

    Methods of facilitating the adhesive bonding of various components with variable frequency microwave energy are disclosed. The time required to cure a polymeric adhesive is decreased by placing components to be bonded via the adhesive in a microwave heating apparatus having a multimode cavity and irradiated with microwaves of varying frequencies. Methods of uniformly heating various articles having conductive fibers disposed therein are provided. Microwave energy may be selectively oriented to enter an edge portion of an article having conductive fibers therein. An edge portion of an article having conductive fibers therein may be selectively shielded from microwave energy.

  18. Adhesive bonding using variable frequency microwave energy

    DOE Patents [OSTI]

    Lauf, R.J.; McMillan, A.D.; Paulauskas, F.L.; Fathi, Z.; Wei, J.

    1998-09-08T23:59:59.000Z

    Methods of facilitating the adhesive bonding of various components with variable frequency microwave energy are disclosed. The time required to cure a polymeric adhesive is decreased by placing components to be bonded via the adhesive in a microwave heating apparatus having a multimode cavity and irradiated with microwaves of varying frequencies. Methods of uniformly heating various articles having conductive fibers disposed therein are provided. Microwave energy may be selectively oriented to enter an edge portion of an article having conductive fibers therein. An edge portion of an article having conductive fibers therein may be selectively shielded from microwave energy. 26 figs.

  19. Adhesive bonding using variable frequency microwave energy

    DOE Patents [OSTI]

    Lauf, R.J.; McMillan, A.D.; Paulauskas, F.L.; Fathi, Z.; Wei, J.

    1998-08-25T23:59:59.000Z

    Methods of facilitating the adhesive bonding of various components with variable frequency microwave energy are disclosed. The time required to cure a polymeric adhesive is decreased by placing components to be bonded via the adhesive in a microwave heating apparatus having a multimode cavity and irradiated with microwaves of varying frequencies. Methods of uniformly heating various articles having conductive fibers disposed therein are provided. Microwave energy may be selectively oriented to enter an edge portion of an article having conductive fibers therein. An edge portion of an article having conductive fibers therein may be selectively shielded from microwave energy. 26 figs.

  20. Evaluation of in-situ cemented backfill performance. Rept. of Investigations/1991

    SciTech Connect (OSTI)

    Tesarik, D.R.; Vickery, J.D.; Seymour, J.B.

    1991-01-01T23:59:59.000Z

    As part of its research program to investigate ways of improving resource recovery and reducing subsidence, researchers from the U.S. Bureau of Mines placed instruments in the B-North ore body of the Cannon Mine, Wenatchee, WA, to monitor cemented backfill and rock deformation during mining. The vibrating-wire guages proved to be reliable and versatile, and approximately half of the instruments are providing data after 2 years of use. A two-dimensional, finite-element model was used to analyze the Cannon Mine's multilevel bench cut-and-fill mining method and predict rock and backfill displacements. The model accurately predicted rock displacements, but the predicted and measured displacements in cemented backfill had a correlation coefficient near zero, indicating that the model should only be used to predict rock displacements and not backfill displacements. A finite-difference model was also used to evaluate the stability of a cemented backfill pillar. Results can be used to conservatively predict backfill stresses, but on-site observations of pillar failures coupled with in situ measurements are needed to make more accurate predictions. An ongoing evaluation of the mining system has indicated that filling the primary stopes tight to the back with cemented backfill allowed these pillars to carry overburden loads soon after the cemented backfill was placed.

  1. In-situ early-age hydration study of sulfobelite cements by synchrotron powder diffraction

    SciTech Connect (OSTI)

    Álvarez-Pinazo, G.; Cuesta, A.; García-Maté, M.; Santacruz, I.; Losilla, E.R. [Departamento de Química Inorgánica, Universidad de Málaga, Campus Teatinos S/N., 29071 Málaga (Spain)] [Departamento de Química Inorgánica, Universidad de Málaga, Campus Teatinos S/N., 29071 Málaga (Spain); Sanfélix, S.G. [Unidad Técnica de Investigación de Materiales, AIDICO, Avda. Benjamín Franklin, 17 Paterna, Valencia (Spain)] [Unidad Técnica de Investigación de Materiales, AIDICO, Avda. Benjamín Franklin, 17 Paterna, Valencia (Spain); Fauth, F. [CELLS-Alba synchrotron, Carretera BP 1413, Km. 3.3, E-08290 Cerdanyola, Barcelona (Spain)] [CELLS-Alba synchrotron, Carretera BP 1413, Km. 3.3, E-08290 Cerdanyola, Barcelona (Spain); Aranda, M.A.G. [Departamento de Química Inorgánica, Universidad de Málaga, Campus Teatinos S/N., 29071 Málaga (Spain) [Departamento de Química Inorgánica, Universidad de Málaga, Campus Teatinos S/N., 29071 Málaga (Spain); CELLS-Alba synchrotron, Carretera BP 1413, Km. 3.3, E-08290 Cerdanyola, Barcelona (Spain); De la Torre, A.G., E-mail: mgd@uma.es [Departamento de Química Inorgánica, Universidad de Málaga, Campus Teatinos S/N., 29071 Málaga (Spain)

    2014-02-15T23:59:59.000Z

    Eco-friendly belite calcium sulfoaluminate (BCSA) cement hydration behavior is not yet well understood. Here, we report an in-situ synchrotron X-ray powder diffraction study for the first hours of hydration of BCSA cements. Rietveld quantitative phase analysis has been used to establish the degree of reaction (?). The hydration of a mixture of ye'elimite and gypsum revealed that ettringite formation (? ? 70% at 50 h) is limited by ye'elimite dissolution. Two laboratory-prepared BCSA cements were also studied: non-active-BCSA and active-BCSA cements, with ?- and ??{sub H}-belite as main phases, respectively. Ye'elimite, in the non-active-BCSA system, dissolves at higher pace (? ? 25% at 1 h) than in the active-BCSA one (? ? 10% at 1 h), with differences in the crystallization of ettringite (? ? 30% and ? ? 5%, respectively). This behavior has strongly affected subsequent belite and ferrite reactivities, yielding stratlingite and other layered phases in non-active-BCSA. The dissolution and crystallization processes are reported and discussed in detail. -- Highlights: •Belite calcium sulfoaluminate cements early hydration mechanism has been determined. •Belite hydration strongly depends on availability of aluminum hydroxide. •Orthorhombic ye’elimite dissolved at a higher pace than cubic one. •Ye’elimite larger reaction degree yields stratlingite formation by belite reaction. •Rietveld method quantified gypsum, anhydrite and bassanite dissolution rates.

  2. Hydraulic and Habitat Suitability Analyses Technical Memorandum

    E-Print Network [OSTI]

    Appendix D Hydraulic and Habitat Suitability Analyses Technical Memorandum #12;COPYRIGHT DECEMBER Series 2 and Pond Series 3 Hydraulic and Habitat Suitability Analyses Prepared for Bureau of Reclamation HILL, INC. III Hydraulic and Habitat Suitability Analyses

  3. Microstructural analyses of Cr(VI) speciation in chromite ore processing Residue (COPR)

    SciTech Connect (OSTI)

    CHRYSOCHOOU, MARIA; FAKRA, SIRINE C .; Marcus, Matthew A.; Moon, Deok Hyun; Dermatas, Dimitris

    2010-03-01T23:59:59.000Z

    The speciation and distribution of Cr(VI) in the solid phase was investigated for two types of chromite ore processing residue (COPR) found at two deposition sites in the United States: gray-black (GB) granular and hard brown (HB) cemented COPR. COPR chemistry and mineralogy were investigated using micro-X-ray absorption spectroscopy and micro-X-ray diffraction, complemented by laboratory analyses. GB COPR contained 30percent of its total Cr(VI) (6000 mg/kg) as large crystals(>20 ?m diameter) of a previously unreported Na-rich analog of calcium aluminum chromate hydrates. These Cr(VI)-rich phases are thought to be vulnerable to reductive and pH treatments. More than 50percent of the Cr(VI) was located within nodules, not easily accessible to dissolved reductants, and bound to Fe-rich hydrogarnet, hydrotalcite, and possibly brucite. These phases are stable over a large pH range, thus harder to dissolve. Brownmilleritewasalso likely associated with physical entrapment of Cr(VI) in the interior of nodules. HB COPR contained no Cr(VI)-rich phases; all Cr(VI) was diffuse within the nodules and absent from the cementing matrix, with hydrogarnet and hydrotalcite being the main Cr(VI) binding phases. Treatment ofHBCOPRis challenging in terms of dissolving the acidity-resistant, inaccessible Cr(VI) compounds; the same applies to ~;;50percent of Cr(VI) in GB COPR.

  4. Nitride-bonded silicon carbide composite filter

    SciTech Connect (OSTI)

    Thomson, B.N.; DiPietro, S.G.

    1995-12-01T23:59:59.000Z

    The objective of this program is to develop and demonstrate an advanced hot gas filter, using ceramic component technology, with enhanced durability to provide increased resistance to thermal fatigue and crack propagation. The material is silicon carbide fiber reinforced nitride bonded silicon carbide.

  5. Fluorinated diamond bonded in fluorocarbon resin

    DOE Patents [OSTI]

    Taylor, Gene W. (Los Alamos, NM)

    1982-01-01T23:59:59.000Z

    By fluorinating diamond grit, the grit may be readily bonded into a fluorocarbon resin matrix. The matrix is formed by simple hot pressing techniques. Diamond grinding wheels may advantageously be manufactured using such a matrix. Teflon fluorocarbon resins are particularly well suited for using in forming the matrix.

  6. Air America: Upholding the Airmen's Bond

    E-Print Network [OSTI]

    Kilgard, Michael P.

    Air America: Upholding the Airmen's Bond April 18, 2009 The University of Texas at Dallas Conference Center Auditorium A Symposium to Acknowledge and Commemorate Air America Rescue Efforts during with Air America Senior Operations Officer, CIA, Retired 2 p.m. Laos Rescues: Lima Site 85 Dr. Tim Castle

  7. Effects of aluminosilicate minerals in clay soil fractions on pore water hydroxide ion concentrations in soil/cement matrices

    E-Print Network [OSTI]

    Cook, Evan Russell

    1998-01-01T23:59:59.000Z

    form of montmorillonite, with 0. 5, 10, 20, and 40 percent bentonite by total, air-dry weight were mixed with Type I Portland cement at 10, 20, and 30 percent cement by weight of air-dry soil. Pore water was expressed and analyzed for hydroxide, calcium...

  8. Carbon black: A low cost colloidal additive for controlling gas-migration in cement slurries

    SciTech Connect (OSTI)

    Calloni, G.; Moroni, N.; Miano, F.

    1995-11-01T23:59:59.000Z

    The effect of different additives on the permeability of cement slurries to formation gas has been studied with the aid of a gas flow apparatus. The performance of two commercial additives (polymer latex and silica fume) has been compared to that of a novel additive (carbon black) that has been developed in the authors laboratories with the aim of simplifying the cement slurry composition and reducing field operational costs. Data on the thickening time, fluid loss, rheology and compressive strength are also presented to provide a clear picture of the potential of carbon black as a substitute for silica fume and polymer latex in some field applications. Finally, the paper describes the results of a field application using carbon black as a gas-block additive in the cement slurry.

  9. Temperature Measurement During Polymerization of Bone Cement in Percutaneous Vertebroplasty: An In Vivo Study in Humans

    SciTech Connect (OSTI)

    Anselmetti, Giovanni Carlo, E-mail: giovanni.anselmetti@ircc.it; Manca, Antonio [Institute for Cancer Research and Treatment (IRCC), Interventional Radiology Unit (Italy); Kanika, Khanna; Murphy, Kieran [Johns Hopkins Hospital, Radiology and Radiological Science (United States); Eminefendic, Haris [Institute for Cancer Research and Treatment (IRCC), Radiology Unit (Italy); Masala, Salvatore ['Tor Vergata' University General Hospital, Department of Diagnostic Imaging, Molecular Imaging, Interventional Radiology and Radiotherapy (Italy); Regge, Daniele [Institute for Cancer Research and Treatment (IRCC), Radiology Unit (Italy)

    2009-05-15T23:59:59.000Z

    Aim of the study was to 'in vivo' measure temperature, during percutaneous vertebroplasty (PV), within a vertebral body injected with different bone cements. According to the declaration of Helsinki, 22 women (60-80 years; mean, 75 years) with painful osteoporotic vertebral collapse underwent bilateral transpedicular PV on 22 lumbar vertebrae. Two 10-G vertebroplasty needles were introduced into the vertebra under digital fluoroscopy; a 16-G radiofrequency thermoablation needle (Starburst XL; RITA Medical System Inc., USA), carrying five thermocouples, was than coaxially inserted. Eleven different bone cements were injected and temperatures were measured every 30 s until temperatures dropped under 45{sup o}C. After the thermocouple needle was withdrawn, bilateral PV was completed with cement injection through the vertebroplasty needle. Unpaired Student's t-tests, Kruskal-Wallis test, and Wilcoxon signed rank test were used to evaluate significant differences (p < 0.05) in peak temperatures, variations between cements, and clinical outcome. All procedures were completed without complications, achieving good clinical outcomes (p < 0.0001). Regarding average peak temperature, cements were divided into three groups: A (over 60{sup o}C), B (from 50{sup o} to 60{sup o}C), and C (below 50{sup o}C). Peak temperature in Group A (86.7 {+-} 10.7{sup o}C) was significantly higher (p = 0.0172) than that in Groups B (60.5 {+-} 3.7{sup o}C) and C (44.8 {+-} 2.6{sup o}C). The average of all thermocouples showed an extremely significant difference (p = 0.0002) between groups. None of the tested cements maintained a temperature {>=}45{sup o}C for more than 30 min. These data suggest that back-pain improvement is obtained not by thermal necrosis but by mechanical consolidation only. The relative necrotic thermal effect in vertebral metastases seems to confirm that analgesia must be considered the main intent of PV.

  10. Sustainability of the cement and concrete industries UWM Center for By-Products Utilization, University of Wisconsin-Milwaukee, Milwaukee, WI, USA

    E-Print Network [OSTI]

    Wisconsin-Milwaukee, University of

    Sustainability of the cement and concrete industries T.R. Naik UWM Center for By of the most widely used construction materials in the world. However, the production of portland cement); production of one ton of portland cement produces about one ton of CO2 and other GHGs. The environmental

  11. A chemo-poro-mechanical model of oilwell cement carbonation under CO2 geological storage A. Fabbri*, N. Jacquemet, D.M. Seyedi

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A chemo-poro-mechanical model of oilwell cement carbonation under CO2 geological storage conditions may impact the mechanical behaviour of wellbore cement in the context of CO2 storage. The model process. The major chemical reactions occurring within cement and their consequences on the volumes

  12. Influence of polysaccharides on cement hydration PESCHARD A.(1), GOVIN A.(1), FREDON E.(1), GROSSEAU P.(1), FANTOZZI G.(2)

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Influence of polysaccharides on cement hydration PESCHARD A.(1), GOVIN A.(1), FREDON E.(1 Cedex, France ABSTRACT This paper is about the influence of polysaccharides on cement hydration. Three media as well as in a dilute media, admixture CE only revealed a slight effect on cement hydration

  13. Impact of cellulose ethers on the cement paste microstructure J. Pourchez*, P. Grosseau*, E. Rouche-Pourchez*, J. Debayle*, J.C. Pinoli*,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Impact of cellulose ethers on the cement paste microstructure J. Pourchez*, P. Grosseau*, E to examine the effects of cellulose ethers on the cement paste microstructure. The obtained results show, the content of air volume and the stabilisation of the porosity from the fresh cement paste to the hardened

  14. INTRODUCTION The increase in energy costs has led to a significant rise in the cost of mixtures containing asphalt cement. This resulted

    E-Print Network [OSTI]

    Harms, Kyle E.

    containing asphalt cement. This resulted in a need to search for alternatives that reduce the cost of those mixed with low percentages (1 percent below standard HMA mixtures) of paving grade asphalt cement and lower percentages of asphalt cement binder and easier compaction efforts. Asphalt treated mixtures can

  15. Soumission Euromat 2011 (sept) Montpellier-Session C52 -Poster Recycling physically sorted steelworks slag for the metallurgical and cement industries

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    steelworks slag for the metallurgical and cement industries: conclusions of the ORLA research project BRGM-silicate-bearing slag for cement-plant recycling. The main minerals associated with the slag --Fe, substituted wustite the cement industry is concerned; - evaluating the phosphorus content and speciation, mainly in calcium

  16. Ghabezloo: Micromechanics analysis of thermal expansion and thermal pressurization of a hardened cement paste Micromechanics analysis of thermal expansion and thermal

    E-Print Network [OSTI]

    Boyer, Edmond

    pore fluid is anomalously higher than the one of pure bulk water. The micromechanics model water-to-cement ratios. It permits also to calculate the pore volume thermal expansion coefficient expansion and thermal pressurization of a hardened cement paste, Cement and Concrete Research, DOI 10.1016/j

  17. Leg 163X Cruise Report -Appendix A: XRF analyses Shorebased XRF analyses

    E-Print Network [OSTI]

    Thy, Peter

    Leg 163X Cruise Report - Appendix A: XRF analyses A-1 Appendix A Shorebased XRF analyses #12;Leg 163X Cruise Report - Appendix A: XRF analyses A-2 Appendix A. Shorebased XRF Analyses (Major Elements

  18. Bayesian field theoretic reconstruction of bond potential and bond mobility in single molecule force spectroscopy

    E-Print Network [OSTI]

    Chang, Joshua C; Chou, Tom

    2015-01-01T23:59:59.000Z

    Quantifying the forces between and within macromolecules is a necessary first step in understanding the mechanics of molecular structure, protein folding, and enzyme function and performance. In such macromolecular settings, dynamic single-molecule force spectroscopy (DFS) has been used to distort bonds. The resulting responses, in the form of rupture forces, work applied, and trajectories of displacements, have been used to reconstruct bond potentials. Such approaches often rely on simple parameterizations of one-dimensional bond potentials, assumptions on equilibrium starting states, and/or large amounts of trajectory data. Parametric approaches typically fail at inferring complex-shaped bond potentials with multiple minima, while piecewise estimation may not guarantee smooth results with the appropriate behavior at large distances. Existing techniques, particularly those based on work theorems, also do not address spatial variations in the diffusivity that may arise from spatially inhomogeneous coupling to...

  19. C-O Bond Activation and C-C Bond Formation Paths in Catalytic CO Hydrogenation

    E-Print Network [OSTI]

    Loveless, Brett

    2012-01-01T23:59:59.000Z

    Anderson, The Fischer-Tropsch and Related Synthesis, Wiley,Anderson, The Fischer-Tropsch and Related Synthesis, Wiley,C-C bond formation paths in Fischer-Tropsch synthesis are

  20. Various Carbon to Carbon Bond Lengths Inter-related via the Golden Ratio, and their Linear Dependence on Bond Energies

    E-Print Network [OSTI]

    Raji Heyrovska

    2008-09-11T23:59:59.000Z

    This work presents the relations between the carbon to carbon bond lengths in the single, double and triple bonds and in graphite, butadiene and benzene. The Golden ratio, which was shown to divide the Bohr radius into two parts pertaining to the charged particles, the electron and proton, and to divide inter-atomic distances into their cationic and anionic radii, also plays a role in the carbon-carbon bonds and in the ionic/polar character of those in graphite, butadiene and benzene. Further, the bond energies of the various CC bonds are shown to vary linearly with the bond lengths.

  1. Soil stabilization and pavement recycling with self-cementing coal fly ash

    SciTech Connect (OSTI)

    NONE

    2008-01-15T23:59:59.000Z

    This manual provides design information for self-cementing coal fly ash as the sole stabilizing agent for a wide range of engineering applications. As in any process, the application of sound engineering practices, appropriate testing, and evaluation of fly ash quality and characteristics will lend themselves to successful projects using the guidelines in this manual. Topics discussed include: self-cementing coal fly ash characteristics; laboratory mix design; stabilization of clay soils; stabilisation of granular materials; construction considerations; high sulfate ash; environmental considerations for fly ash stabilization; design considerations; state specification/guidelines/standards; and a sample of a typical stabilization specification.

  2. Appearance of the first cemental annulation of permanent incisor teeth of the domestic cat (Felis catus)

    E-Print Network [OSTI]

    Choi, In-Back

    1983-01-01T23:59:59.000Z

    APPEARANCE OF THE FIRST CEMENTAL ANNULATION OF PERMANENT INCISOR TEETH OF THE OOMESTIC CAT (FELIS CA US) A Thesis by IN-BACK CHOI Submitted to the Graduate College of Texas AIlM University in partial fulfillment of the requirements for degree... of MASTER OF SCIENCE August 19S3 Major Subject: Veterinary Anatomy APPEARANCE OF THE FIRST CEMENTAL ANNULATION OF THE FFRMANENT INCISOR TEETH OF THE DOMEST'C CAT (EEL IS CATL'S) A Thesis by IN-BACK CHOI Approved as to styie and content by: is, D. V...

  3. A cement kiln flue-dust evaluated as a soil liming material

    E-Print Network [OSTI]

    Stacha, Raimund

    1973-01-01T23:59:59.000Z

    A CEMENT KILN FLUE-DUST EVALUATED AS A SOIl LIMING MATERIAL A Thesis by RAIMUND STACHA Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE 1973 NJSbj t...:~StlCh tt A CEMENT KILN FLUE-DUST EVALUATED AS A SOIL I IMING MATERIAL A Thesis by RAIMUND STACHA Approved as to style and content by: (Chairman of Committee) (Head of Department) (Me er) (Member) (Member) (Member) (Member) 1973 ABSTRACT A...

  4. CSER 00-001 Criticality Safety Evaluation Report for Cementation Operations at the PFP

    SciTech Connect (OSTI)

    DOBBIN, K.D.

    2000-04-18T23:59:59.000Z

    Glovebox HA-20MB is located in Room 235B of the 234-5Z Building at the Plutonium Finishing Plant. This enclosure contains mixers, mixer bowls, a crusher unit, an isolated inoperable conveyor unit, plutonium residue feed cans, cemented cans, and a feedwater container. Plutonium residue, not conducive to other forms of stabilization, is prepared for storage and ultimate disposal by cementation. The feed residue material cans can have plutonium contents of only a few grams or up to 200 grams. This evaluation accommodates this wide range of container fissile concentrations.

  5. Tensile creep of soil-cement and its relationship to fatigue

    E-Print Network [OSTI]

    Kim, Youngsoo

    1985-01-01T23:59:59.000Z

    Creep curves at different temperatures. 19 Log (D(t)-Dz) vs. log t at different temperatures. 68 69 INTRODUCTION Portland cement is an extremely important stabilizing agent for a wide range of soil types. Because of its strength-enhancing property... Mechanics (LEFM) is applicable to the investigation and determination of realistic failure criteria of fine-grained soils stabilized with Portland cement [27]. This is due to the fact that the radius of curvature at the tip of a microcrack is small...

  6. Stabilization of high and low solids Consolidated Incinerator Facility (CIF) waste with super cement

    SciTech Connect (OSTI)

    Walker, B.W.

    2000-01-11T23:59:59.000Z

    This report details solidification activities using selected Mixed Waste Focus Area technologies with the High and Low Solid waste streams. Ceramicrete and Super Cement technologies were chosen as the best possible replacement solidification candidates for the waste streams generated by the SRS incinerator from a list of several suggested Mixed Waste Focus Area technologies. These technologies were tested, evaluated, and compared to the current Portland cement technology being employed. Recommendation of a technology for replacement depends on waste form performance, process flexibility, process complexity, and cost of equipment and/or raw materials.

  7. A Signal-Inducing Bone Cement for Magnetic Resonance Imaging-Guided Spinal Surgery Based on Hydroxyapatite and Polymethylmethacrylate

    SciTech Connect (OSTI)

    Wichlas, Florian, E-mail: florian.wichlas@charite.de; Seebauer, Christian J.; Schilling, Rene [University Charite, Center for Musculoskeletal Surgery (Germany); Rump, Jens [University Charite, Department of Radiology (Germany); Chopra, Sascha S. [University Charite, Center for Musculoskeletal Surgery (Germany); Walter, Thula; Teichgraeber, Ulf K. M. [University Charite, Department of Radiology (Germany); Bail, Hermann J. [University Charite, Center for Musculoskeletal Surgery (Germany)

    2012-06-15T23:59:59.000Z

    The aim of this study was to develop a signal-inducing bone cement for magnetic resonance imaging (MRI)-guided cementoplasty of the spine. This MRI cement would allow precise and controlled injection of cement into pathologic lesions of the bone. We mixed conventional polymethylmethacrylate bone cement (PMMA; 5 ml methylmethacrylate and 12 g polymethylmethacrylate) with hydroxyapatite (HA) bone substitute (2-4 ml) and a gadolinium-based contrast agent (CA; 0-60 {mu}l). The contrast-to-noise ratio (CNR) of different CA doses was measured in an open 1.0-Tesla scanner for fast T1W Turbo-Spin-Echo (TSE) and T1W TSE pulse sequences to determine the highest signal. We simulated MRI-guided cementoplasty in cadaveric spines. Compressive strength of the cements was tested. The highest CNR was (1) 87.3 (SD 2.9) in fast T1W TSE for cements with 4 {mu}l CA/ml HA (4 ml) and (2) 60.8 (SD 2.4) in T1W TSE for cements with 1 {mu}l CA/ml HA (4 ml). MRI-guided cementoplasty in cadaveric spine was feasible. Compressive strength decreased with increasing amounts of HA from 46.7 MPa (2 ml HA) to 28.0 MPa (4 ml HA). An MRI-compatible cement based on PMMA, HA, and CA is feasible and clearly visible on MRI images. MRI-guided spinal cementoplasty using this cement would permit direct visualization of the cement, the pathologic process, and the anatomical surroundings.

  8. Experimental bond critical point and local energy density properties...

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

    Mn-O, Fe-O and Co-O bonded interactions for Abstract: Bond critical point, bcp, and local energy density properties for the electron density, ED, distributions, calculated with...

  9. Pre-plated reactive diffusion-bonded battery electrode plaques

    DOE Patents [OSTI]

    Maskalick, Nicholas J. (Pittsburgh, PA)

    1984-01-01T23:59:59.000Z

    A high strength, metallic fiber battery plaque is made using reactive diffusion bonding techniques, where a substantial amount of the fibers are bonded together by an iron-nickel alloy.

  10. Single-Issue Industrial Revenue Bond Program (Missouri)

    Broader source: Energy.gov [DOE]

    The Missouri Development Finance Board administers a Single-Issue Tax-Exempt Industrial Revenue Bond Program as well as a Taxable Industrial Revenue Bond Program. The Tax-Exempt Program finances (i...

  11. Imaging Intrinsic Diffusion of Bridge-Bonded Oxygen Vacancies...

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

    Intrinsic Diffusion of Bridge-Bonded Oxygen Vacancies on TiO2(110). Imaging Intrinsic Diffusion of Bridge-Bonded Oxygen Vacancies on TiO2(110). Abstract: Since oxygen atom...

  12. ORNL: Low-Cost Direct Bonded Aluminum (DBA) Substrates (Agreement...

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

    ORNL: Low-Cost Direct Bonded Aluminum (DBA) Substrates (Agreement ID:23278) ORNL: Low-Cost Direct Bonded Aluminum (DBA) Substrates (Agreement ID:23278) 2013 DOE Hydrogen and Fuel...

  13. Ultrafast conversions between hydrogen bonded structures in liquid water observed by femtosecond x-ray spectroscopy

    E-Print Network [OSTI]

    Wen, Haidan

    2010-01-01T23:59:59.000Z

    manifesting in fewer/weaker hydrogen bonds and structuralstructures with weaker hydrogen-bonding is recorded viais characteristic of the hydrogen bond network in water. The

  14. Partial-Transient-Liquid-Phase Bonding of Advanced Ceramics Using Surface-Modified Interlayers

    E-Print Network [OSTI]

    Reynolds, Thomas Bither

    2012-01-01T23:59:59.000Z

    Theoretical-Model for Diffusion Bonding." Metal Science 16,Derby, B. & Wallach, E. "Diffusion Bonding - Development ofInterfacial Contact during Diffusion Bonding." Metallurgical

  15. Geomechanical analyses to investigate wellbore/mine interactions in the Potash Enclave of Southeastern New Mexico.

    SciTech Connect (OSTI)

    Ehgartner, Brian L.; Bean, James E. (Sandia Staffing Alliance, LLC, Albuquerque, NM); Arguello, Jose Guadalupe, Jr.; Stone, Charles Michael

    2010-04-01T23:59:59.000Z

    Geomechanical analyses have been performed to investigate potential mine interactions with wellbores that could occur in the Potash Enclave of Southeastern New Mexico. Two basic models were used in the study; (1) a global model that simulates the mechanics associated with mining and subsidence and (2) a wellbore model that examines the resulting interaction impacts on the wellbore casing. The first model is a 2D approximation of a potash mine using a plane strain idealization for mine depths of 304.8 m (1000 ft) and 609.6 m (2000 ft). A 3D wellbore model then considers the impact of bedding plane slippage across single and double cased wells cemented through the Salado formation. The wellbore model establishes allowable slippage to prevent casing yield.

  16. Hydrogen Bonding DOI: 10.1002/anie.200501349

    E-Print Network [OSTI]

    Simons, Jack

    systems[5­13] and crystal engineering.[14­18] Most C�H···O hydrogen bonds have been observed for the soHydrogen Bonding DOI: 10.1002/anie.200501349 Observation of Weak C�H···O Hydrogen Bonding to Unactivated Alkanes** Xue-Bin Wang, Hin-Koon Woo, Boggavarapu Kiran, and Lai-Sheng Wang* The hydrogen bond

  17. Measuring Interfacial Stiffness of Adhesively-Bonded Wood

    E-Print Network [OSTI]

    Nairn, John A.

    , the interfaces will fail, the elements will cease to share load, and the composite will have poor properties property. Nearly all methods for characterizing wood adhesive bonds consider only strength of the bonds. Typically a bond line is loaded until failure and the final load at failure is recorded. Some common

  18. Hydrogen Bonding Penalty upon Ligand Binding Hongtao Zhao, Danzhi Huang*

    E-Print Network [OSTI]

    Caflisch, Amedeo

    Hydrogen Bonding Penalty upon Ligand Binding Hongtao Zhao, Danzhi Huang* Department of Biochemistry, University of Zurich, Zurich, Switzerland Abstract Ligand binding involves breakage of hydrogen bonds with water molecules and formation of new hydrogen bonds between protein and ligand. In this work, the change

  19. Flip chip electrical interconnection by selective electroplating and bonding

    E-Print Network [OSTI]

    Lin, Liwei

    the interconnection and device substrates to en- hance the ion diffusion during the final electroplating and bondingFlip chip electrical interconnection by selective electroplating and bonding L.-W. Pan, P. Yuen, L of flip-chip, selective elec- troplating and bonding. The electrical interconnection lines are built

  20. Energetics of hydrogen bonds in peptides Sheh-Yi Sheu*

    E-Print Network [OSTI]

    Sheu, Sheh-Yi

    for water. We find that the activation energy for the rupture of the hydrogen bond in a -sheet under calculation can be useful for the prediction of hydrogen bond strengths in various environments of interest extensively to calculate free energy changes caused by hydrogen bond rupture. Here the water environment

  1. Analysis of C H...O hydrogen bonds

    E-Print Network [OSTI]

    Babu, M. Madan

    1 Analysis of C H...O hydrogen bonds in high resolution protein crystal structures from the PDB 1.4 Identification of C-H...O hydrogen bonds............................................. 1.4.1 The definition of a C-H...O hydrogen bond.................................... 1.4.2 Fixing the hydrogen and measuring the parameters

  2. Article coated with flash bonded superhydrophobic particles

    DOE Patents [OSTI]

    Simpson, John T (Clinton, TN) [Clinton, TN; Blue, Craig A (Knoxville, TN) [Knoxville, TN; Kiggans, Jr., James O [Oak Ridge, TN

    2010-07-13T23:59:59.000Z

    A method of making article having a superhydrophobic surface includes: providing a solid body defining at least one surface; applying to the surface a plurality of diatomaceous earth particles and/or particles characterized by particle sizes ranging from at least 100 nm to about 10 .mu.m, the particles being further characterized by a plurality of nanopores, wherein at least some of the nanopores provide flow through porosity, the particles being further characterized by a plurality of spaced apart nanostructured features that include a contiguous, protrusive material; flash bonding the particles to the surface so that the particles are adherently bonded to the surface; and applying a hydrophobic coating layer to the surface and the particles so that the hydrophobic coating layer conforms to the nanostructured features.

  3. Uncertainty and Sensitivity Analyses Plan

    SciTech Connect (OSTI)

    Simpson, J.C.; Ramsdell, J.V. Jr.

    1993-04-01T23:59:59.000Z

    Hanford Environmental Dose Reconstruction (HEDR) Project staff are developing mathematical models to be used to estimate the radiation dose that individuals may have received as a result of emissions since 1944 from the US Department of Energy's (DOE) Hanford Site near Richland, Washington. An uncertainty and sensitivity analyses plan is essential to understand and interpret the predictions from these mathematical models. This is especially true in the case of the HEDR models where the values of many parameters are unknown. This plan gives a thorough documentation of the uncertainty and hierarchical sensitivity analysis methods recommended for use on all HEDR mathematical models. The documentation includes both technical definitions and examples. In addition, an extensive demonstration of the uncertainty and sensitivity analysis process is provided using actual results from the Hanford Environmental Dose Reconstruction Integrated Codes (HEDRIC). This demonstration shows how the approaches used in the recommended plan can be adapted for all dose predictions in the HEDR Project.

  4. Mesoscale Analyses of Fungal Networks

    E-Print Network [OSTI]

    Lee, Sang Hoon; Porter, Mason A

    2014-01-01T23:59:59.000Z

    We give a brief application of mesoscopic response functions (MRFs) to a large set of networks of fungi and slime moulds. We construct "structural networks" by estimating cord conductances (which yield edge weights) from experimental data and "functional networks" by calculating edge weights based on how much nutrient traffic is predicted to occur on each edge. Both types of networks have the same topology, and we compute MRFs for both families of networks to illustrate two different ways of constructing taxonomies to compare large sets of fungal and slime-mould networks to each other. We demonstrate that network taxonomies allow objective groupings of networks across species, treatments, and laboratories. We believe that the groupings that we have derived through our structural and functional taxonomic analyses of fungal networks could be of considerable assistance to biologists in their attempts to capture the impact of treatment combinations on network behaviour.

  5. Anesthesia cutoff phenomenon: Interfacial hydrogen bonding

    SciTech Connect (OSTI)

    Chiou, J.S.; Ma, S.M.; Kamaya, H.; Ueda, I. (Univ. of Utah School of Medicine, Salt Lake City (USA))

    1990-05-04T23:59:59.000Z

    Anesthesia cutoff refers to the phenomenon of loss of anesthetic potency in a homologous series of alkanes and their derivatives when their sizes become too large. In this study, hydrogen bonding of 1-alkanol series (ethanol to eicosanol) to dipalmitoyl-L-alpha-phosphatidylcholine (DPPC) was studied by Fourier transform infrared spectroscopy (FTIR) in DPPC-D2O-in-CCl4 reversed micelles. The alkanols formed hydrogen bonds with the phosphate moiety of DPPC and released the DPPC-bound deuterated water, evidenced by increases in the bound O-H stretching signal of the alkanol-DPPC complex and also in the free O-D stretching band of unbound D2O. These effects increased according to the elongation of the carbon chain of 1-alkanols from ethanol (C2) to 1-decanol (C10), but suddenly almost disappeared at 1-tetradecanol (C14). Anesthetic potencies of these alkanols, estimated by the activity of brine shrimps, were linearly related to hydrogen bond-breaking activities below C10 and agreed with the FTIR data in the cutoff at C10.

  6. Microchannel cooling of face down bonded chips

    DOE Patents [OSTI]

    Bernhardt, Anthony F. (Berkeley, CA)

    1993-01-01T23:59:59.000Z

    Microchannel cooling is applied to flip-chip bonded integrated circuits, in a manner which maintains the advantages of flip-chip bonds, while overcoming the difficulties encountered in cooling the chips. The technique is suited to either multichip integrated circuit boards in a plane, or to stacks of circuit boards in a three dimensional interconnect structure. Integrated circuit chips are mounted on a circuit board using flip-chip or control collapse bonds. A microchannel structure is essentially permanently coupled with the back of the chip. A coolant delivery manifold delivers coolant to the microchannel structure, and a seal consisting of a compressible elastomer is provided between the coolant delivery manifold and the microchannel structure. The integrated circuit chip and microchannel structure are connected together to form a replaceable integrated circuit module which can be easily decoupled from the coolant delivery manifold and the circuit board. The coolant supply manifolds may be disposed between the circuit boards in a stack and coupled to supplies of coolant through a side of the stack.

  7. Microchannel cooling of face down bonded chips

    DOE Patents [OSTI]

    Bernhardt, A.F.

    1993-06-08T23:59:59.000Z

    Microchannel cooling is applied to flip-chip bonded integrated circuits, in a manner which maintains the advantages of flip-chip bonds, while overcoming the difficulties encountered in cooling the chips. The technique is suited to either multi chip integrated circuit boards in a plane, or to stacks of circuit boards in a three dimensional interconnect structure. Integrated circuit chips are mounted on a circuit board using flip-chip or control collapse bonds. A microchannel structure is essentially permanently coupled with the back of the chip. A coolant delivery manifold delivers coolant to the microchannel structure, and a seal consisting of a compressible elastomer is provided between the coolant delivery manifold and the microchannel structure. The integrated circuit chip and microchannel structure are connected together to form a replaceable integrated circuit module which can be easily decoupled from the coolant delivery manifold and the circuit board. The coolant supply manifolds may be disposed between the circuit boards in a stack and coupled to supplies of coolant through a side of the stack.

  8. Thermal Modeling of A Friction Bonding Process

    SciTech Connect (OSTI)

    John Dixon; Douglas Burkes; Pavel Medvedev

    2007-10-01T23:59:59.000Z

    A COMSOL model capable of predicting temperature evolution during nuclear fuel fabrication is being developed at the Idaho National Laboratory (INL). Fuel plates are fabricated by friction bonding (FB) uranium-molybdenum (U-Mo) alloy foils positioned between two aluminum plates. The ability to predict temperature distribution during fabrication is imperative to ensure good quality bonding without inducing an undesirable chemical reaction between U-Mo and aluminum. A three-dimensional heat transfer model of the FB process implementing shallow pin penetration for cladding monolithic nuclear fuel foils is presented. Temperature distribution during the FB process as a function of fabrication parameters such as weld speed, tool load, and tool rotational frequency are predicted. Model assumptions, settings, and equations are described in relation to standard friction stir welding. Current experimental design for validation and calibration of the model is also demonstrated. Resulting experimental data reveal the accuracy in describing asymmetrical temperature distributions about the tool face. Temperature of the bonded plate drops beneath the pin and is higher on the advancing side than the retreating side of the tool.

  9. Vacuum fusion bonding of glass plates

    DOE Patents [OSTI]

    Swierkowski, Steve P. (Livermore, CA); Davidson, James C. (Livermore, CA); Balch, Joseph W. (Livermore, CA)

    2001-01-01T23:59:59.000Z

    An improved apparatus and method for vacuum fusion bonding of large, patterned glass plates. One or both glass plates are patterned with etched features such as microstructure capillaries and a vacuum pumpout moat, with one plate having at least one hole therethrough for communication with a vacuum pumpout fixture. High accuracy alignment of the plates is accomplished by a temporary clamping fixture until the start of the fusion bonding heat cycle. A complete, void-free fusion bond of seamless, full-strength quality is obtained through the plates; because the glass is heated well into its softening point and because of a large, distributed force that is developed that presses the two plates together from the difference in pressure between the furnace ambient (high pressure) and the channeling and microstructures in the plates (low pressure) due to the vacuum drawn. The apparatus and method may be used to fabricate microcapillary arrays for chemical electrophoresis; for example, any apparatus using a network of microfluidic channels embedded between plates of glass or similar moderate melting point substrates with a gradual softening point curve, or for assembly of glass-based substrates onto larger substrates, such as in flat panel display systems.

  10. Vacuum fusion bonding of glass plates

    DOE Patents [OSTI]

    Swierkowski, Steve P. (Livermore, CA); Davidson, James C. (Livermore, CA); Balch, Joseph W. (Livermore, CA)

    2000-01-01T23:59:59.000Z

    An improved apparatus and method for vacuum fusion bonding of large, patterned glass plates. One or both glass plates are patterned with etched features such as microstructure capillaries and a vacuum pumpout moat, with one plate having at least one hole therethrough for communication with a vacuum pumpout fixture. High accuracy alignment of the plates is accomplished by a temporary clamping fixture until the start of the fusion bonding heat cycle. A complete, void-free fusion bond of seamless, full-strength quality is obtained through the plates; because the glass is heated well into its softening point and because of a large, distributed force that is developed that presses the two plates together from the difference in pressure between the furnace ambient (high pressure) and the channeling and microstructures in the plates (low pressure) due to the vacuum drawn. The apparatus and method may be used to fabricate microcapillary arrays for chemical electrophoresis; for example, any apparatus using a network of microfluidic channels embedded between plates of glass or similar moderate melting point substrates with a gradual softening point curve, or for assembly of glass-based substrates onto larger substrates, such as in flat panel display systems.

  11. Improved microstructure of cement-based composites through the addition of rock wool particles

    SciTech Connect (OSTI)

    Lin, Wei-Ting [Dept. of Civil Engineering, National Ilan University, Ilan 26047, Taiwan (China); Institute of Nuclear Energy Research, Atomic Energy Council, Taoyuan 32546, Taiwan (China); Cheng, An, E-mail: ancheng@niu.edu.tw [Dept. of Civil Engineering, National Ilan University, Ilan 26047, Taiwan (China); Huang, Ran; Zou, Si-Yu [Dept. of Harbor and River Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan (China)

    2013-10-15T23:59:59.000Z

    Rock wool is an inorganic fibrous substance produced by steam blasting and cooling molten glass. As with other industrial by-products, rock wool particles can be used as cementitious materials or ultra fine fillers in cement-based composites. This study investigated the microstructure of mortar specimens produced with cement-based composites that include various forms of rock wool particles. It conducted compressive strength testing, rapid chloride penetration tests, X-ray diffraction analysis, thermo-gravimetric analysis, and scanning electronic microscopy to evaluate the macro- and micro-properties of the cement-based composites. Test results indicate that inclusion of rock wool particles in composites improved compressive strength and reduced chloride ion penetration at the age of 91 days due to the reduction of calcium hydroxide content. Microscopic analysis confirms that the use of rock wool particles contributed to the formation of a denser, more compact microstructure within the hardened paste. In addition, X-ray diffraction analysis shows few changes in formation of pozzolanic reaction products and no new hydrations are formed with incorporating rock wool particles. - Highlights: • We report the microstructural characterization of cement-based composites. • Different mixes produced with various rock wool particles have been tested. • The influence of different mixes on macro and micro properties has been discussed. • The macro properties are included compressive strength and permeability. • XRD and SEM observations confirm the pozzolanic reaction in the resulting pastes.

  12. Cyclic Loading of Fiber-Containing Cement Sheaths in HPHT Conditions

    E-Print Network [OSTI]

    Johns, Andrew Wesley

    2014-09-05T23:59:59.000Z

    A Chandler 7600 Ultra HPHT Viscometer was setup to imitate well bore conditions of high pressure, high temperature wells, and the research objective was to investigate the reaction of Class H cement with 35% silica and 0.5% nylon fiber to cyclic...

  13. Expansive cement couplers: A means of pre-tensioning fibre-reinforced plastic tendons

    E-Print Network [OSTI]

    Lees, Janet M.; Gruffydd-Jones, B.; Burgoyne, C.J.

    . The current paper investigates the potential for the use of expansive cement couplers as a means of pretensioning frp tendons. An experimental study was carried out on couplers to join steel reinforcing bars and then extended to include the coupling of frp...

  14. The interfacial chemistry of solidification/stabilization of metals in cement and pozzolanic material systems

    SciTech Connect (OSTI)

    Yousuf, M.; Mollah, A.; Vempati, R.K.; Lin, T.C.; Cocke, D.L. [Lamar Univ., Beaumont, TX (United States)] [Lamar Univ., Beaumont, TX (United States)

    1995-11-01T23:59:59.000Z

    The chemistry of cement, its hydration and mechanisms of solidification/stabilization (s/s) of toxic metals by cement-based systems and pozzolanic materials are significantly controlled by surface, near-surface and interfacial phenomena. The adsorption conditions and the selectivity strong affinity of hazardous metals towards clay minerals, certain hydrated metal oxides and oxyhydroxides, and cementitous substances also play an important role in the s/s process for the immobilization of contaminants. Recent works from the authors` laboratory involving metal ions and superplasticizers have elucidated the mechanisms of reactions leading to the retardation of cement hydration and subsequent setting and their interactions with silicate-based systems. This article delineates the current status of interfacial chemistry at the solid-liquid boundary and places it in perspective with present and future s/s processes based on Portland cement and pozzolanic materials. The importance of surface charge, the role of interfacial phenomena on adsorption, and the importance of calcium and other types of anions and cations in s/s are also discussed. A surface charge control reaction model that accounts for the importance of calcium and other cations and anions is outlined and used to discuss the chemical nature and microstructure of the interfacial transition zone.

  15. Abstract Practical manufacturing and use of thin cement-based elements composites require

    E-Print Network [OSTI]

    Mobasher, Barzin

    performance was achieved for the PP pultruded composites. Keywords Cement composite Æ Textile Æ Processing Æ-mail: alvpeled@bgumail.bgu.ac.il B. Mobasher Department of Civil and Environmental Engineering, Arizona State that the produc- tion method can have substantial impact on the properties of the final product [11

  16. Recovery Act Production of Algal BioCrude Oil from Cement Plant Carbon Dioxide

    SciTech Connect (OSTI)

    Robert Weber; Norman Whitton

    2010-09-30T23:59:59.000Z

    The consortium, led by Sunrise Ridge Algae Inc, completed financial, legal, siting, engineering and environmental permitting preparations for a proposed demonstration project that would capture stack gas from an operating cement plant and convert the carbon dioxide to beneficial use as a liquid crude petroleum substitute and a coal substitute, using algae grown in a closed system, then harvested and converted using catalyzed pyrolysis.

  17. Design principles for design of bituminous pavement with stabilized/ cemented layer

    E-Print Network [OSTI]

    Das, Animesh

    Design principles for design of bituminous pavement with stabilized/ cemented layer Animesh Das1 Introduction A pavement designer wishes to design a pavement structure which is reliable and cost effective. Various materials have been used for pavement construction so as to economize the design. Depleting

  18. Prediction of Cement Physical Properties by Virtual Testing D.P. Bentza

    E-Print Network [OSTI]

    Bentz, Dale P.

    testing to assess the quality of their product, resulting in large costs for both materials (and, heat of hydration, chemical shrinkage, setting times, compressive strength development, and pore high quality long lasting concrete structures, cements of a high and consistent quality must

  19. Prediction of cement physical properties by virtual testing C.J. Haecker

    E-Print Network [OSTI]

    Bentz, Dale P.

    industry performs extensive physical testing to assess the quality9f their product, resulting in large, compressive strength development, and pore solution concentrations. When the starting materials high quality long lasting concrete structures, cements of a high and consistent quality must

  20. A THERMODYNAMICS STUDY ON THE UTILIZATION OF JORDANIAN OIL SHALE IN CEMENT INDUSTRY

    E-Print Network [OSTI]

    Awni Y. Al-otoom

    Oil shale can be utilized in manufacturing the Portland cement. In addition to the utilization of the spent oil shale after combustion, it can also reduce the required temperature for the clinkering reactions. A study on the Jordanian oil shale was performed to maximize the use of oil shale in the

  1. Corrosion of Aluminium in Composite Cements Anthony Setiadi* and Neil B. Milestone

    E-Print Network [OSTI]

    Sheffield, University of

    Corrosion of Aluminium in Composite Cements Anthony Setiadi* and Neil B. Milestone Immobilisation they are economic, durable and have long-term stability. However, there may be issues regarding the corrosion it is exposed to air, an oxide layer is formed. This layer generally provides protection to further corrosion

  2. Cement-based biocide coatings for controlling algal growth in water distribution canals

    E-Print Network [OSTI]

    Mobasher, Barzin

    to potable or waste water. There is however a lack of understanding in the correlation between the natureCement-based biocide coatings for controlling algal growth in water distribution canals A. Alum Foundation, Water Quality Center, Arizona State University, Tempe, AZ, United States a r t i c l e i n f o

  3. 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

  4. Effects of oil charge on illite dates and stopping quartz cement: calibration of basin models

    E-Print Network [OSTI]

    Haszeldine, Stuart

    Abstract Effects of oil charge on illite dates and stopping quartz cement: calibration of basin Oil can fill pores in reservoir sandstones at any burial depth by long or short distance migration. There has been a debate since 1920 concerning the effect of oil charge. We have made detailed local

  5. Proceedings of the 12 International Congress on the Chemistry of Cement

    E-Print Network [OSTI]

    Bentz, Dale P.

    in water or as a granular water-filled porous media. In the former case, significant settling, and Evaporative Water Loss during Early Age Curing/Drying Immediately after placement, gravitational forces and the local drying environment begin to influence the (micro)structure of a cement paste, mortar, or concrete

  6. Potential Energy Savings and CO2 Emissions Reduction of China's Cement Industry

    E-Print Network [OSTI]

    Ke, Jing

    2013-01-01T23:59:59.000Z

    energy efficiency measures in heavy industry in China, India, Brazil,and energy (including electricity) in 2003-2004 were about 0.65 t CO 2 /t of cement in Brazil,Brazil, 78% in Italy, 80% in Spain, 74% in China, and 91% in the United This article was originally published in “Energy

  7. Development of a performance-based industrial energy efficiency indicator for cement manufacturing plants.

    SciTech Connect (OSTI)

    Boyd, G.; Decision and Information Sciences

    2006-07-21T23:59:59.000Z

    Organizations that implement strategic energy management programs have the potential to achieve sustained energy savings if the programs are carried out properly. A key opportunity for achieving energy savings that plant managers can take is to determine an appropriate level of energy performance by comparing the plant performance with that of similar plants in the same industry. Manufacturing plants can set energy efficiency targets by using performance-based indicators. The U.S. Environmental Protection Agency (EPA), through its ENERGY STAR{reg_sign} program, has been developing plant energy performance indicators (EPIs) to encourage a variety of U.S. industries to use energy more efficiently. This report describes work with the cement manufacturing industry to provide a plant-level indicator of energy efficiency for assembly plants that produce a variety of products, including Portland cement and other specialty cement products, in the United States. Consideration is given to the role that performance-based indicators play in motivating change; the steps needed to develop indicators, including interacting with an industry to secure adequate data for an indicator; and the actual application and use of an indicator when complete. How indicators are employed in the EPA's efforts to encourage industries to voluntarily improve their use of energy is discussed as well. The report describes the data and statistical methods used to construct the EPI for cement manufacturing plants. Individual equations are presented, as are the instructions for using them in an associated Excel spreadsheet.

  8. Recycle of Wastes of Clay Brick Industry for Producing Eco-cement

    E-Print Network [OSTI]

    Amin, A. M

    2010-01-01T23:59:59.000Z

    mixes were designed from the WCB and ordinary Portland cement (OPC). After adding the required amount of water for each mix, the pastes were moulded in 5x5x5cm3 mould. The initial and final setting time were measured. The moulded specimens were cured...

  9. Identification and characterization of agent for reductive dechlorination in mixtures of ferrous iron and Portland cement

    E-Print Network [OSTI]

    Ko, Sae Bom

    2001-01-01T23:59:59.000Z

    were conducted to identify a potential active agent in a mixture of Fe(II) and Portland cement extract (PCX). Results of XRD analysis indicated that a potential active agent is likely to be green rust chloride, which is a layered Fe...

  10. ORIGINAL ARTICLE Carbonate cements in Miller field of the UK North Sea: a natural

    E-Print Network [OSTI]

    Haszeldine, Stuart

    a minority of the reservoired CO2 in Miller (6­24%) has been sequestrated in carbonates, even after 70 Ma sequestration Á Carbonate cements Á Stable isotopes Á Mineral dissolution Á Miller field Introduction, anorthite, chlorite), however, to provide cations for carbonate formation. Mineral sequestration efficiency

  11. Hydrogen Bond Breaking and Reformation in Alcohol Oligomers Following Vibrational Relaxation of a Non-Hydrogen-Bond Donating Hydroxyl Stretch

    E-Print Network [OSTI]

    Fayer, Michael D.

    Hydrogen Bond Breaking and Reformation in Alcohol Oligomers Following Vibrational Relaxation of a Non-Hydrogen-Bond Donating Hydroxyl Stretch K. J. Gaffney, I. R. Piletic, and M. D. Fayer* Department measured with ultrafast infrared pump-probe experiments. Non-hydrogen-bond donating OD stretches (2690 cm-1

  12. Emerging Energy-efficiency and CO{sub 2} Emission-reduction Technologies for Cement and Concrete Production

    SciTech Connect (OSTI)

    Hasanbeigi, Ali; Price, Lynn; Lin, Elina

    2012-04-06T23:59:59.000Z

    Globally, the cement industry accounts for approximately 5 percent of current anthropogenic carbon dioxide (CO{sub 2}) emissions. World cement demand and production are increasing significantly, leading to an increase in this industry's absolute energy use and CO{sub 2} emissions. Development of new energy-efficiency and CO{sub 2} emission-reduction technologies and their deployment in the market will be key for the cement industry's mid- and long-term climate change mitigation strategies. This report is an initial effort to compile available information on process description, energy savings, environmental and other benefits, costs, commercialization status, and references for emerging technologies to reduce the cement industry's energy use and CO{sub 2} emissions. Although studies from around the world identify a variety of sector-specific and cross-cutting energy-efficiency technologies for the cement industry that have already been commercialized, information is scarce and/or scattered regarding emerging or advanced energy-efficiency and low-carbon technologies that are not yet commercialized. This report consolidates available information on nineteen emerging technologies for the cement industry, with the goal of providing engineers, researchers, investors, cement companies, policy makers, and other interested parties with easy access to a well-structured database of information on these technologies.

  13. Brownfield reuse of dredged New York Harbor sediment by cement-based solidification/stabilization

    SciTech Connect (OSTI)

    Loest, K. [ECDC Environmental L.C., Pembroke, MA (United States). Eastern Operations; Wilk, C.M. [Portland Cement Association, Skokie, IL (United States)

    1998-12-31T23:59:59.000Z

    Newly effective federal regulations restrict the ocean disposal of sediments dredged from the harbors of New York and Newark. The New York Port Authority is faced with a critical situation: find land-based disposal/uses for 10`s of millions cubic yards of sediments or lose standing as a commercial port for ocean-going ships. One of the technologies now being employed to manage the sediments is portland cement-based solidification/stabilization (S/S) treatment. At least 4 million cubic yards of the sediments will undergo cement-based S/S treatment. This treatment will immobilize heavy metals, dioxin, PCBs and other organic contaminants in the sediment. The treatment changes the sediment from a environmental liability into a valuable structural fill. This structural fill is being used at two properties. The first property is an old municipal landfill in Port Newark, New Jersey. The treated sediments are being used as structural fill to cover about 20 acres of the landfill. This will allow planned redevelopment of the landfill property into a shopping mall. The second property called the Seaboard site, was the location of a coal gasification facility and later a wood preservation facility. This 160-acre property has been designated for brownfield redevelopment. Over 4 million cubic yards of treated sediments will eventually cover this site. Portland cement is the selected S/S binding reagent. Nearly 500,000 tons of cement will eventually be used to treat the sediments. Cement was selected for its ability to (a) change the peanut butter-like consistency of the sediments into a structural material and (b) to physically and chemically immobilize hazardous constituents in the sediment.

  14. Method for bonding a transmission line to a downhole tool

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Fox, Joe (Spanish Fork, UT)

    2007-11-06T23:59:59.000Z

    An apparatus for bonding a transmission line to the central bore of a downhole tool includes a pre-formed interface for bonding a transmission line to the inside diameter of a downhole tool. The pre-formed interface includes a first surface that substantially conforms to the outside contour of a transmission line and a second surface that substantially conforms to the inside diameter of a downhole tool. In another aspect of the invention, a method for bonding a transmission line to the inside diameter of a downhole tool includes positioning a transmission line near the inside wall of a downhole tool and placing a mold near the transmission line and the inside wall. The method further includes injecting a bonding material into the mold and curing the bonding material such that the bonding material bonds the transmission line to the inside wall.

  15. Partial-Transient-Liquid-Phase Bonding of Advanced Ceramics Using Surface-Modified Interlayers

    E-Print Network [OSTI]

    Reynolds, Thomas Bither

    2012-01-01T23:59:59.000Z

    Alumina Diffusion Bonding and Titanium Active Brazing."O 3 -Titanium Adhesion in the View of the Diffusion Bonding

  16. Bond selective chemistry beyond the adiabatic approximation

    SciTech Connect (OSTI)

    Butler, L.J. [Univ. of Chicago, IL (United States)

    1993-12-01T23:59:59.000Z

    One of the most important challenges in chemistry is to develop predictive ability for the branching between energetically allowed chemical reaction pathways. Such predictive capability, coupled with a fundamental understanding of the important molecular interactions, is essential to the development and utilization of new fuels and the design of efficient combustion processes. Existing transition state and exact quantum theories successfully predict the branching between available product channels for systems in which each reaction coordinate can be adequately described by different paths along a single adiabatic potential energy surface. In particular, unimolecular dissociation following thermal, infrared multiphoton, or overtone excitation in the ground state yields a branching between energetically allowed product channels which can be successfully predicted by the application of statistical theories, i.e. the weakest bond breaks. (The predictions are particularly good for competing reactions in which when there is no saddle point along the reaction coordinates, as in simple bond fission reactions.) The predicted lack of bond selectivity results from the assumption of rapid internal vibrational energy redistribution and the implicit use of a single adiabatic Born-Oppenheimer potential energy surface for the reaction. However, the adiabatic approximation is not valid for the reaction of a wide variety of energetic materials and organic fuels; coupling between the electronic states of the reacting species play a a key role in determining the selectivity of the chemical reactions induced. The work described below investigated the central role played by coupling between electronic states in polyatomic molecules in determining the selective branching between energetically allowed fragmentation pathways in two key systems.

  17. Repairable chip bonding/interconnect process

    DOE Patents [OSTI]

    Bernhardt, Anthony F. (Berkeley, CA); Contolini, Robert J. (Livermore, CA); Malba, Vincent (Livermore, CA); Riddle, Robert A. (Tracy, CA)

    1997-01-01T23:59:59.000Z

    A repairable, chip-to-board interconnect process which addresses cost and testability issues in the multi-chip modules. This process can be carried out using a chip-on-sacrificial-substrate technique, involving laser processing. This process avoids the curing/solvent evolution problems encountered in prior approaches, as well is resolving prior plating problems and the requirements for fillets. For repairable high speed chip-to-board connection, transmission lines can be formed on the sides of the chip from chip bond pads, ending in a gull wing at the bottom of the chip for subsequent solder.

  18. Repairable chip bonding/interconnect process

    DOE Patents [OSTI]

    Bernhardt, A.F.; Contolini, R.J.; Malba, V.; Riddle, R.A.

    1997-08-05T23:59:59.000Z

    A repairable, chip-to-board interconnect process which addresses cost and testability issues in the multi-chip modules is disclosed. This process can be carried out using a chip-on-sacrificial-substrate technique, involving laser processing. This process avoids the curing/solvent evolution problems encountered in prior approaches, as well is resolving prior plating problems and the requirements for fillets. For repairable high speed chip-to-board connection, transmission lines can be formed on the sides of the chip from chip bond pads, ending in a gull wing at the bottom of the chip for subsequent solder. 10 figs.

  19. Covalent Bonding in Actinide Sandwich Molecules

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power Administration would likeConstitution AndControllingCoolCorrectiveCostsXCovalent Bonding in

  20. Covalent Bonding in Actinide Sandwich Molecules

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power Administration would likeConstitution AndControllingCoolCorrectiveCostsXCovalent Bonding