Sample records for riverside cement power

  1. EIS-0449: Solar Millennium Blythe Solar Power Project in Riverside...

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

    in Riverside County, CA December 10, 2010 EIS-0449: Notice of Adoption of the Final Environmental Impact Statement Blythe Solar Power Project December 10, 2010 EIS-0449:...

  2. UC Riverside University of California, Riverside

    E-Print Network [OSTI]

    Mills, Allen P.

    Cultura Americana, Inglés para Negocios Internacionales, y programas para mejo Negocios A. Gary Anderson; y la Facultad de Educación. Famosa internacionalmente por su servicio, enseñanza internacionales con estos servicios por más de 50 años. UC Riverside Extension's International Education Programs

  3. Riverside, CA Vehicle Purchase Incentives

    Broader source: Energy.gov [DOE]

    City of Riverside residents and employees are eligible to receive a rebate toward the purchase of qualified natural gas or hybrid electric vehicles purchased from a City of Riverside automobile...

  4. Riverside County- Sustainable Building Policy

    Broader source: Energy.gov [DOE]

    In February 2009, the County of Riverside Board of Supervisors adopted Policy Number H-29, creating the Sustainable Building Policy. The Policy requires that all new county building projects...

  5. Electrical Engineering University of California, Riverside

    E-Print Network [OSTI]

    Electrical Engineering University of California, Riverside Bourns College of Engineering Electrical EngineeringElectrical Engineering Alexander A. Balandin Associate Professor Department of Electrical Engineering University of California - Riverside May 2005 Group Advising Meeting #12;Electrical Engineering

  6. EIS-0439: Rice Solar Energy Project in Riverside County, CA ...

    Office of Environmental Management (EM)

    Riverside County, CA October 22, 2010 EIS-0439: EPA Notice of Availability of the Draft Environmental Impact Statement Rice Solar Energy Project, Riverside County, California...

  7. 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.

  8. 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.

  9. Methodological and Practical Considerations for DevelopingMultiproject Baselines for Electric Power and Cement Industry Projects inCentral America

    SciTech Connect (OSTI)

    Murtishaw, Scott; Sathaye, Jayant; Galitsky, Christina; Dorion,Kristel

    2004-09-02T23:59:59.000Z

    The Lawrence Berkeley National Laboratory (Berkeley Lab) andthe Center for Sustainable Development in the Americas (CSDA) conductedtechnical studies and organized two training workshops to developcapacity in Central America for the evaluation of climate changeprojects. This paper describes the results of two baseline case studiesconducted for these workshops, one for the power sector and one for thecement industry, that were devised to illustrate certain approaches tobaseline setting. Multiproject baseline emission rates (BERs) for themain Guatemalan electricity grid were calculated from 2001 data. Inrecent years, the Guatemalan power sector has experienced rapid growth;thus, a sufficient number of new plants have been built to estimateviable BERs. We found that BERs for baseload plants offsetting additionalbaseload capacity ranged from 0.702 kgCO2/kWh (using a weighted averagestringency) to 0.507 kgCO2/kWh (using a 10th percentile stringency),while the baseline for plants offsetting load-followingcapacity is lowerat 0.567 kgCO2/kWh. For power displaced from existing load-followingplants, the rate is higher, 0.735 kgCO2/kWh, as a result of the age ofsome plants used for meeting peak loads and the infrequency of their use.The approved consolidated methodology for the Clean Development Mechanismyields a single rate of 0.753 kgCO2/kWh. Due to the relatively smallnumber of cement plants in the region and the regional nature of thecement market, all of Central America was chosen as the geographicboundary for setting cement industry BERs. Unfortunately, actualoperations and output data were unobtainable for most of the plants inthe region, and many data were estimated. Cement industry BERs rangedfrom 205 kgCO2 to 225 kgCO2 per metric ton of cement.

  10. University of California Riverside Campus Aggregate

    E-Print Network [OSTI]

    Mills, Allen P.

    Appendix A: Meeting Minutes 97 Appendix B: Cost Estimate Benchmarks 125 Appendix C: UCR Long-Term Capacity Planning Study2 Prepared for: UC Riverside Capital & Physical Planning Prepared by: Walker Macy Landscape Physical Planner, UCR Capital & Physical Planning (Project Manager) Tim Ralston, Assistant Vice Chancellor

  11. 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.

  12. Western Riverside Council of Governments- Large Commercial PACE (California)

    Broader source: Energy.gov [DOE]

    Western Riverside Council of Governments (WRCOG) is offering business owners in WRCOG participating jurisdictions an opportunity to finance energy and water efficiency projects for their commercial...

  13. EIS-0455: Genesis Solar Energy Project in Riverside County, CA...

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

    7, 2010 EIS-0455: Notice of Adoption of an Environmental Impact Statement Genesis Solar Energy Project, Riverside County, CA August 27, 2010 EIS-0455: Final Environmental Impact...

  14. and Co-Host Riverside Electric Vehicle Day

    E-Print Network [OSTI]

    Mills, Allen P.

    and Co-Host Riverside Electric Vehicle Day Where: UC Riverside | CE-CERT, 1084 Columbia Ave, 92507 renewable sourc- es, efficiently use electric transporta- tion through advanced vehicles and im- prove our million electric vehi- cles on California's roads by 2023 and to ensure that low-income communities, which

  15. Riverside Geothermal Area | 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 YouKizildere IRaghuraji Agro Industries Pvt Ltd Jump to: navigation,Maze -RichtonMissouri:Park,Energy CooperativeRiverside

  16. Techno-economic study of the calcium looping process for CO2 capture from cement and biomass power plants

    E-Print Network [OSTI]

    Ozcan, Dursun Can

    2014-11-27T23:59:59.000Z

    The first detailed systematic investigation of a cement plant with various carbon capture technologies has been performed. The calcium looping (Ca-looping) process has emerged as a leading option for this purpose, since ...

  17. The development of plant for reprocessing of radioactive waste from atomic power plant decommissioning with cementation method

    SciTech Connect (OSTI)

    Barinov, A.S.; Volkov, A.S.; Dmitriev, S.A.; Flit, V.U.; Chebishev, V.M. [Moscow SIA Radon, Sergiev Posad (Russian Federation). Dept. of Engineering Supply

    1993-12-31T23:59:59.000Z

    The primary purpose for developing this facility is to design a universal mixer, which carries out the process of cementation either in continuous or in batch mode under close control. The second aim for development is to simplify, as much as possible, the process of decontamination of the mixer. The mixer is developed on the base of the apparatus and consists of the inductor of the apparatus with the vorticity layer, where magnet windings which produce a rotating magnetic field are placed.

  18. 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.

  19. Methodological and Practical Considerations for Developing Multiproject Baselines for Electric Power and Cement Industry Projects in Central America

    E-Print Network [OSTI]

    Murtishaw, Scott; Sathaye, Jayant; Galitsky, Christina; Dorion, Kristel

    2008-01-01T23:59:59.000Z

    generators entered into power purchase agreements (PPAs)take-orpay clause in its power purchase agreement. While thereceived generous power purchase agreements, but information

  20. Release of radionuclides and chelating agents from cement-solidified decontamination low-level radioactive waste collected from the Peach Bottom Atomic Power Station Unit 3

    SciTech Connect (OSTI)

    Akers, D.W.; Kraft, N.C.; Mandler, J.W. [EG and G Idaho, Inc., Idaho Falls, ID (United States)

    1994-03-01T23:59:59.000Z

    As part of a study being performed for the Nuclear Regulatory Commission (NRC), small-scale waste-form specimens were collected during a low oxidation-state transition-metal ion (LOMI)-nitric permanganate (NP)-LOMI solidification performed in October 1989 at the Peach Bottom Atomic Power Station Unit 3. The purpose of this program was to evaluate the performance of cement-solidified decontamination waste to meet the low-level waste stability requirements defined in the NRC`s ``Technical Position on Waste Form,`` Revision 1. The samples were acquired and tested because little data have been obtained on the physical stability of actual cement-solidified decontamination ion-exchange resin waste forms and on the leachability of radionuclides and chelating agents from those waste forms. The Peach Bottom waste-form specimens were subjected to compressive strength, immersion, and leach testing in accordance with the NRC`s ``Technical Position on Waste Form,`` Revision 1. Results of this study indicate that the specimens withstood the compression tests (>500 psi) before and after immersion testing and leaching, and that the leachability indexes for all radionuclides, including {sup 14}C, {sup 99}{Tc}, and {sup 129}I, are well above the leachability index requirement of 6.0, required by the NRC`s ``Technical Position on Waste Form,`` Revision 1.

  1. CEMENT RELATED RESEARCH HYDROGEOCHEMISTRY GROUP

    E-Print Network [OSTI]

    Politcnica 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

  2. Western Riverside Council of Governments- Home Energy Renovation Opportunity (HERO) Financing Program (California)

    Broader source: Energy.gov [DOE]

    Western Riverside Council of Governments (WRCOG) is offering homeowners in WRCOG participating jurisdictions an opportunity to finance energy and water efficiency projects in their homes. The Home...

  3. 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

  4. Methodological and Practical Considerations for Developing Multiproject Baselines for Electric Power and Cement Industry Projects in Central America

    E-Print Network [OSTI]

    Murtishaw, Scott; Sathaye, Jayant; Galitsky, Christina; Dorion, Kristel

    2008-01-01T23:59:59.000Z

    de?ne as all heavy and distillate fuel oil plants. Theirengines burning heavy fuel oil, whereas prior to that, theit is available and heavy fuel oil for supplying power to

  5. Riverside County, California: Energy Resources | 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:Ezfeedflag JumpID-f < RAPID‎ |Rippey Jump to: navigation, search Name RippeyRiverside

  6. City of Riverside, California (Utility Company) | 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, clickInformation Smyrna Beach, FloridaCity ofCity ofRiverside, California

  7. Wellbore cement fracture evolution at the cementbasalt 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 C 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.

  8. 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.

  9. 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...

  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

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

  11. 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.

  12. 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-Lock1 Technology for Decontaminating Dredged Estuarine

  13. 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

  14. 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.

  15. 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.

  16. 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

  17. 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 cements 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.

  18. Compression and immersion tests and leaching of radionuclides, stable metals, and chelating agents from cement-solidified decontamination waste collected from nuclear power stations

    SciTech Connect (OSTI)

    Akers, D.W.; Kraft, N.C.; Mandler, J.W. [EG and G Idaho, Inc., Idaho Falls, ID (United States)

    1994-06-01T23:59:59.000Z

    A study was performed for the Nuclear Regulatory Commission (NRC) to evaluate structural stability and leachability of radionuclides, stable metals, and chelating agents from cement-solidified decontamination ion-exchange resin wastes collected from seven commercial boiling water reactors and one pressurized water reactor. The decontamination methods used at the reactors were the Can-Decon, AP/Citrox, Dow NS-1, and LOMI processes. Samples of untreated resin waste and solidified waste forms were subjected to immersion and compressive strength testing. Some waste-form samples were leach-tested using simulated groundwaters and simulated seawater for comparison with the deionized water tests that are normally performed to assess waste-form leachability. This report presents the results of these tests and assesses the effects of the various decontamination methods, waste form formulations, leachant chemical compositions, and pH of the leachant on the structural stability and leachability of the waste forms. Results indicate that releases from intact and degraded waste forms are similar and that the behavior of some radionuclides such as {sup 55}Fe, {sup 60}Co, and {sup 99}Tc were similar. In addition, the leachability indexes are greater than 6.0, which meets the requirement in the NRC`s ``Technical Position on Waste Form,`` Revision 1.

  19. Suggested Course Plan for a UC Riverside Major in Electrical Engineering 06

    E-Print Network [OSTI]

    Suggested Course Plan for a UC Riverside Major in Electrical Engineering 06 (Catalog Year 2006 9A First Year Calculus CHEM 1A/1LA General Chemistry EE 10 Intro to Electrical Engineering ENGR 92 Differential Equations PHYS 40C Physics (Electricity/Magnetism) EE 1A/1LA Engineering Circuit Analysis MATH 10A

  20. 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

  1. Reconstruction of Long-Lived Radionuclide Intakes for Techa Riverside Residents: Cesium-137

    SciTech Connect (OSTI)

    Tolstykh, E. I.; Degteva, M. O.; Peremyslova, L. M.; Shagina, N. B.; Vorobiova, M. I.; Anspaugh, L. R.; Napier, Bruce A.

    2013-05-01T23:59:59.000Z

    Radioactive contamination of the Techa River (Southern Urals, Russia) occurred from 19491956 due to routine and accidental releases of liquid radioactive wastes from the Mayak Production Association. The long-lived radionuclides in the releases were 90Sr and 137Cs. Contamination of the components of the Techa River system resulted in chronic external and internal exposure of about 30,000 residents of riverside villages. Data on radionuclide intake with diet are used to estimate internal dose in the Techa River Dosimetry System (TRDS), which was elaborated for the assessment of radiogenic risk for Techa Riverside residents. The 90Sri ntake function was recently improved taking into account the recently available archival data on radionuclide releases and in-depth analysis of the extensive data on 90Sr measurements in Techa Riverside residents. The main purpose of this paper is to evaluate the dietary intake of 137Cs by Techa Riverside residents. The 137Cs intake with river water used for drinking was reconstructed on the basis of the 90Sr intake-function and the concentration ratio 137Cs/90Sr in river water. Intake via 137Cs transfer from floodplain soil to grass and cows milk was evaluated for the first time. As a result, the maximal 137Cs intake level was indicated near the site of releases in upper-Techa River settlements (8,0009,000 kBq). For villages located on the lower Techa River the 137Cs intake was significantly less (down to 300 kBq). Cows milk was the main source of 137Cs in diet in the upper-Techa.

  2. 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

  3. 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

  4. 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

  5. WATER SCIENCE AND POLICY CENTER 2228 Geology Bldg Riverside, CA 92521 951-827-9772 www.wspc.ucr.edu Seminar Series

    E-Print Network [OSTI]

    WATER SCIENCE AND POLICY CENTER 2228 Geology Bldg Riverside, CA 92521 951-827-9772 www.wspc.ucr.edu Seminar Series WATER SCIENCE AND POLICY CENTER University of California, Riverside Seminars listed below of Irrigation Water Conservation" March 30, 2011-- Professor Daene McKinney, University of Texas, Austin

  6. 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

  7. On PowerLaw Relationships of the Internet Topology Michalis Faloutsos

    E-Print Network [OSTI]

    On Power­Law Relationships of the Internet Topology Michalis Faloutsos U.C. Riverside Dept. of Comp Despite the apparent randomness of the Internet, we dis­ cover some surprisingly simple power­laws of the Internet topology. These power­laws hold for three snapshots of the Internet, between November 1997

  8. On Power-Law Relationships of the Internet Topology Michalis Faloutsos

    E-Print Network [OSTI]

    On Power-Law Relationships of the Internet Topology Michalis Faloutsos U.C. Riverside Dept. of Comp the apparent randomness of the Internet, we dis- cover some surprisingly simple power-laws of the Internet topology. These power-laws hold for three snapshots of the Internet, between November 1997 and December

  9. 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)

  10. EIS-0439: Rice Solar Energy Project, Riverside County, California

    Broader source: Energy.gov [DOE]

    This environmental review was prepared by DOEs Western Area Power Administration with the Department of the Interiors Bureau of Land Management (BLM) as a cooperating agency. This EIS evaluates the environmental impacts of the Rice Solar Energy Project, a 150-megawatt solar concentrating electric powerplant proposed to be constructed on private land in the Sonoran Desert. DOEs Western Area Power Administration actions under this proposal include building and operating a new substation to interconnect the solar project to Westerns transmission system. DOE may also use this EIS as part of its decision whether to issue a Federal loan guarantee to support the proposal. BLMs actions under this proposal includes amending California Desert Conservation Area Plan to designate a new corridor for a 161-kV transmission line, which would facilitate the development of solar energy on private lands.

  11. 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

  12. Economic analysis of the European cement industry

    E-Print Network [OSTI]

    Paris-Sud XI, Universit 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

  13. 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

  14. 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.

  15. 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.

  16. 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.

  17. 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.

  18. 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

  19. Map of Cement Site

    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 PowerCherries 82981-1cnHigh SchoolIn12electronEnergy Manufacturing Energy andYou areID

  20. 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, ...

  1. EIS-0449: Solar Millennium Blythe Solar Power Project in Riverside County,

    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:Revised FindingDepartment ofStatementStatement |Department ofDepartmentCA |

  2. 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.

  3. 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.

  4. 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 ofBsche, A. , 1993. Variable Speed Drives in Cement Plants,World Cement 6 24 pp.2- Buzzi, S. 1997. Die Horomill - Eine

  5. 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

  6. 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,...

  7. 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...

  8. 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...

  9. 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...

  10. 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...

  11. 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...

  12. 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...

  13. 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...

  14. 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...

  15. 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...

  16. 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...

  17. 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...

  18. 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...

  19. 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...

  20. 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...

  1. 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...

  2. 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...

  3. 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...

  4. 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...

  5. Determination of soil properties for sandy soils and road base at Riverside Campus using laboratory testing and numerical simulation

    E-Print Network [OSTI]

    Saez Barrios, Deeyvid O.

    2010-07-14T23:59:59.000Z

    : Chair of Committee, Jean-Louis Briaud Committee Members, Charles Aubeny Julian Kang Head of Department, John Niedzwecki Major Subject: Civil Engineering iii ABSTRACT Determination of Soil Properties of Sandy... Soils and Road Base at Riverside Campus Using Laboratory Testing and Numerical Simulation. (May 2010) Deeyvid Oscar Saez Barrios, B.En., Technological University of Panama Chair of Advisory Committee: Jean-Louis Briaud This study evaluated...

  6. 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.

  7. 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.

  8. A Unifying Approach to Assessing Market Power in Deregulated Electricity Markets

    E-Print Network [OSTI]

    Low, Steven H.

    A Unifying Approach to Assessing Market Power in Deregulated Electricity Markets Chenye Wu1 of Technology, 3University of California, Riverside Abstract--A competitive deregulated electricity market with increasingly active market players is foreseen to be the future of the electricity industry. In such settings

  9. A Power-Driven Thermal Sensor Placement Algorithm for Dynamic Thermal Management

    E-Print Network [OSTI]

    Tan, Sheldon X.-D.

    of Electrical Engineering, University of California, Riverside, CA 92521 USA Abstract--On-chip physical thermalA Power-Driven Thermal Sensor Placement Algorithm for Dynamic Thermal Management Hai Wang, Sheldon sensors play a vital role for accurately estimating the full-chip thermal profile. How to place physical

  10. 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

  11. 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

  12. 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

  13. Waste Heat Recovery Power Generation with WOWGen

    E-Print Network [OSTI]

    Romero, M.

    applications of heat recovery power generation can be found in Industry (e.g. steel, glass, cement, lime, pulp and paper, refining and petrochemicals), Power Generation (CHP, biomass, biofuel, traditional fuels, gasifiers, diesel engines) and Natural Gas...

  14. 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.

  15. 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.

  16. 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. Tams. BurnabilityofCementRawMaterialsatRapidCalcinationConditions. CementandConcreteResearchandHermanH. Tseng. CementPlantOperationsHandbook:

  17. 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

  18. 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

  19. 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 ...

  20. 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

  1. 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

  2. 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...

  3. 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 ...

  4. 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...

  5. Optimal Risk-aware Power Procurement for Data Centers in Day-Ahead and Real-Time Electricity Markets

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    Optimal Risk-aware Power Procurement for Data Centers in Day-Ahead and Real-Time Electricity Markets Mahdi Ghamkhari, Hamed Mohsenian-Rad, and Adam Wierman Department of Electrical Engineering, University of California, Riverside, CA, USA Department of Computing and Mathematical Sciences, California

  6. 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...

  7. 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

  8. 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 facility??s production process.

  9. 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, berlandstrasse 129, 8600 Dbendorf (Switzerland); Wieland, E. [Paul Scherrer Institute, Laboratory for Waste Management, 5232 Villigen PSI (Switzerland); Lothenbach, B. [Empa, Laboratory for Concrete and Construction Chemistry, berlandstrasse 129, 8600 Dbendorf (Switzerland); Dhn, 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.

  10. 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

  11. 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.

  12. 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,

  13. 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,

  14. 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.

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

  20. 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

  1. 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 Departement 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

  2. 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

  3. 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

  4. 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 Federal 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

  5. 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

  6. 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

  7. 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

  8. 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.

  9. Feasibility Study of Economics and Performance of Solar Photovoltaics at the Stringfellow Superfund Site in Riverside, California

    SciTech Connect (OSTI)

    Mosey, G.; Van Geet, O.

    2010-12-01T23:59:59.000Z

    This report presents the results of an assessment of the technical and economic feasibility of deploying a photovoltaics (PV) system on the Stringfellow Superfund Site in Riverside, California. The site was assessed for possible PV installations. The cost, performance, and site impacts of different PV options were estimated. The economics of the potential systems were analyzed using an electric rate of $0.13/kWh and incentives offered by Southern California Edison under the California Solar Initiative. According to the assessment, a government-owned, ground-mounted PV system represents a technically and economically feasible option. The report recommends financing options that could assist in the implementation of such a system.

  10. 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 Chinas cement industry. Energy Policy 45 (751. Kong, Xiangzhong (China Cement Association, CCA), 2009.

  11. 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 cements 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 CSs 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.

  12. 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.

  13. 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.

  14. 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

  15. 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 Bsche, A.Variable Speed Drives in Cement Plants, World Cement 6 24

  16. 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

  17. 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

  18. 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

  19. 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

  20. 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 Chinas Cement Sector. 2009. Bao , Xianfa.

  1. InstantaneousIn-SituDetermination of Water-CementRatio 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.

  2. 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...

  3. 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,

  4. 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...

  5. 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.

  6. 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

  7. 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...

  8. 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

  9. 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)

  10. 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.

  11. 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. *...

  12. 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

  13. 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

  14. 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

  15. 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

  16. 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...

  17. 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

  18. 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.

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

    E-Print Network [OSTI]

    Paris-Sud XI, Universit 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

  20. 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

  1. 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

  2. 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

  3. 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 -

  4. Phase Change Materials for Thermal Energy Storage in Concentrated Solar Thermal Power Plants

    E-Print Network [OSTI]

    Hardin, Corey Lee

    2011-01-01T23:59:59.000Z

    UNIVERSITY OF CALIFORNIA RIVERSIDE Phase Change Materials for Thermal Energy Storage in Concentrated Solar

  5. 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.

  6. 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.

  7. 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

  8. Winston Chung Commits to a $10 Million Gift to UC Riverside

    E-Print Network [OSTI]

    to give $10 million to support clean battery power, solar energy and sustainable transportation research-Center for Environmental Research & Technology (CE-CERT) and the Southern California Research Initiative for Solar Energy and the Winston Chung Professorship in Sustainability. Establish the Winston Chung Global Energy Center within

  9. 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

  10. 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 unlled to fully cement lled, often with a variety of distinctively colored spar cements. The lls may also

  11. 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

  12. [ ]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

  13. 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

  14. 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

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

    E-Print Network [OSTI]

    Paris-Sud XI, Universit 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

  16. 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

  17. 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

  18. 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.

  19. 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.

  20. 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...

  1. 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

  2. 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.

  3. 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...

  4. 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...

  5. 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...

  6. 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 ...

  7. 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...

  8. 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...

  9. 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 50C 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.

  10. 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...

  11. 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.

  12. WATER SCIENCE AND POLICY CENTER 2228 Geology Bldg Riverside, CA 92521 951-827-9772 www.wspc.ucr.edu Seminars listed below will be held in the ORBACH SCIENCE LIBRARY,

    E-Print Network [OSTI]

    WATER SCIENCE AND POLICY CENTER 2228 Geology Bldg Riverside, CA 92521 951-827-9772 www Agricultural Adaptation to Water and Climate Variability: The Value of a Water Portfolio" January 28, 2013: Ph, University of North Carolina "Meeting Urban Water Demands: Engineering, Economics and Managing Risk" February

  13. 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.

  14. 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.

  15. 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

  16. 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 ...

  17. 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

  18. 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 ...

  19. 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

  20. 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 Chinas CementEnergy Savings and CO2 Emissions Reduction of Chinas Cement

  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

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

  2. 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

  3. 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...

  4. 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.

  5. 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

  6. 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

  7. 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

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

    E-Print Network [OSTI]

    Paris-Sud XI, Universit 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

  9. 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

  10. 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

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

    E-Print Network [OSTI]

    Paris-Sud XI, Universit 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

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

    E-Print Network [OSTI]

    Paris-Sud XI, Universit 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

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

    E-Print Network [OSTI]

    Paris-Sud XI, Universit 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

  14. 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 -tobermorite. CSH is the major binding phase of cement. Strontium was shown

  15. 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

  16. 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

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

    E-Print Network [OSTI]

    Paris-Sud XI, Universit 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

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

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    of gaseous cement industry effluents on four species of microalgae Amlie 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

  19. 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

  20. 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

  1. 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

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

    E-Print Network [OSTI]

    Paris-Sud XI, Universit 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

  3. 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

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

    E-Print Network [OSTI]

    Paris-Sud XI, Universit 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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...

  13. 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...

  14. 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.

  15. '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...

  16. 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...

  17. 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

  18. 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...

  19. 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

  20. 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...

  1. 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...

  2. 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.

  3. 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

  4. 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.

  5. 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

  6. 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 ...

  7. 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}.

  8. 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.

  9. 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.

  10. 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

    leading manufacturers in China, costs roughly 20 to 33% ofwith high power costs. In China, however, low temperaturedomestically in China. 1 Energy/Environment/Cost/Other

  11. 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...

  12. 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;

  13. 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

  14. 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

  15. 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

  16. 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...

  17. 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.

  18. 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

  19. 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.

  20. 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).

  1. 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.

  2. 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.

  3. 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

  4. 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...

  5. 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.

  6. 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...

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

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

    E-Print Network [OSTI]

    Paris-Sud XI, Universit 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

  15. 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...

  16. 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

  17. 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

  18. 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

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

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    cement paste Siavash Ghabezloo Universite 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

  20. 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

  1. 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

  2. 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. FALLICK 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

  3. 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

  4. 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...

  5. Application of 'Six Sigma{sup TM}' and 'Design of Experiment' for Cementation - Recipe Development for Evaporator Concentrate for NPP Ling AO, Phase II (China) - 12555

    SciTech Connect (OSTI)

    Fehrmann, Henning [Westinghouse Electric Germany GmbH (Germany); Perdue, Robert [Westinghouse Electric Company (United States)

    2012-07-01T23:59:59.000Z

    Cementation of radioactive waste is a common technology. The waste is mixed with cement and water and forms a stable, solid block. The physical properties like compression strength or low leach ability depends strongly on the cement recipe. Due to the fact that this waste cement mixture has to fulfill special requirements, a recipe development is necessary. The Six Sigma{sup TM}' DMAIC methodology, together with the Design of experiment (DoE) approach, was employed to optimize the process of a recipe development for cementation at the Ling Ao nuclear power plant (NPP) in China. The DMAIC offers a structured, systematical and traceable process to derive test parameters. The DoE test plans and statistical analysis is efficient regarding the amount of test runs and the benefit gain by getting a transfer function. A transfer function enables simulation which is useful to optimize the later process and being responsive to changes. The DoE method was successfully applied for developing a cementation recipe for both evaporator concentrate and resin waste in the plant. The key input parameters were determined, evaluated and the control of these parameters were included into the design. The applied Six Sigma{sup TM} tools can help to organize the thinking during the engineering process. Data are organized and clearly presented. Various variables can be limited to the most important ones. The Six Sigma{sup TM} tools help to make the thinking and decision process trace able. The tools can help to make data driven decisions (e.g. C and E Matrix). But the tools are not the only golden way. Results from scoring tools like the C and E Matrix need close review before using them. The DoE is an effective tool for generating test plans. DoE can be used with a small number of tests runs, but gives a valuable result from an engineering perspective in terms of a transfer function. The DoE prediction results, however, are only valid in the tested area. So a careful selection of input parameter and their limits for setting up a DoE is very important. An extrapolation of results is not recommended because the results are not reliable out of the tested area. (authors)

  6. 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.

  7. 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.

  8. 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 300C. Calcium borosilicate (CBS) and zinc phosphate, significantly improved CS corrosion-protection by decreasing cements 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.

  9. 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 300C. Calcium borosilicate (CBS) and zinc phosphate, significantly improved CS corrosion-protection by decreasing cements 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.

  10. 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.

  11. 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 cementbrine 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 cementCO{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.

  12. 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.

  13. Power Factor Reactive Power

    E-Print Network [OSTI]

    motor power: 117.7 V x 5.1 A = 600 W? = 0.6 kW? NOT the power measured by meter #12;Page 9 PSERC: displacement power factor: angle between voltage and current = 0 degrees pf = cos(0 degrees) = 1.0 true powerPage 1 PSERC Power Factor and Reactive Power Ward Jewell Wichita State University Power Systems

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

    SciTech Connect (OSTI)

    Garca-Mat, M.; De la Torre, A.G. [Departamento de Qumica Inorgnica, Cristalografa y Mineraloga, Universidad de Mlaga, 29071 Mlaga (Spain)] [Departamento de Qumica Inorgnica, Cristalografa y Mineraloga, Universidad de Mlaga, 29071 Mlaga (Spain); Len-Reina, L. [Servicios Centrales de Apoyo a la Investigacin, Universidad de Mlaga, 29071 Mlaga (Spain)] [Servicios Centrales de Apoyo a la Investigacin, Universidad de Mlaga, 29071 Mlaga (Spain); Aranda, M.A.G. [Departamento de Qumica Inorgnica, Cristalografa y Mineraloga, Universidad de Mlaga, 29071 Mlaga (Spain) [Departamento de Qumica Inorgnica, Cristalografa y Mineraloga, Universidad de Mlaga, 29071 Mlaga (Spain); CELLS-Alba synchrotron, Carretera BP 1413, Km. 3.3, E-08290 Cerdanyola, Barcelona (Spain); Santacruz, I., E-mail: isantacruz@uma.es [Departamento de Qumica Inorgnica, Cristalografa y Mineraloga, Universidad de Mlaga, 29071 Mlaga (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.

  15. 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

  16. 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

  17. 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

  18. 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.

  19. 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.

  20. 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.

  1. 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.

  2. 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.

  3. 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.

  4. 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...

  5. 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 (50C) 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.

  6. 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.

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

    E-Print Network [OSTI]

    Ghabezloo, Siavash; Saint-Marc, Jrmie

    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.

  8. 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...

  9. 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

  10. 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...

  11. 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 ...

  12. 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.

  13. 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...

  14. 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...

  15. 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, ...

  16. 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 ...

  17. 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.

  18. 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,

  19. 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.

  20. 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.

  1. 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.

  2. 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...

  3. 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...

  4. 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...

  5. 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

  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 Savings and CO2 Emissions Reduction of Chinas CementEnergy Savings and CO2 Emissions Reduction of Chinas Cementenergy savings and CO2 emission reduction potentials are

  7. 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.

  8. 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.

  9. 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...

  10. 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...

  11. 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...

  12. 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.

  13. 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.

  14. 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.

  15. 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

  16. 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...

  17. Power Plant Power Plant

    E-Print Network [OSTI]

    Tingley, Joseph V.

    Basin Center for Geothermal Energy at University of Nevada, Reno (UNR) 2 Nevada Geodetic LaboratoryStillwater Power Plant Wabuska Power Plant Casa Diablo Power Plant Glass Mountain Geothermal Area Lassen Geothermal Area Coso Hot Springs Power Plants Lake City Geothermal Area Thermo Geothermal Area

  18. 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

  19. 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

  20. 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...

  1. 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.

  2. 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.

  3. 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.

  4. 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.

  5. In-situ early-age hydration study of sulfobelite cements by synchrotron powder diffraction

    SciTech Connect (OSTI)

    lvarez-Pinazo, G.; Cuesta, A.; Garca-Mat, M.; Santacruz, I.; Losilla, E.R. [Departamento de Qumica Inorgnica, Universidad de Mlaga, Campus Teatinos S/N., 29071 Mlaga (Spain)] [Departamento de Qumica Inorgnica, Universidad de Mlaga, Campus Teatinos S/N., 29071 Mlaga (Spain); Sanflix, S.G. [Unidad Tcnica de Investigacin de Materiales, AIDICO, Avda. Benjamn Franklin, 17 Paterna, Valencia (Spain)] [Unidad Tcnica de Investigacin de Materiales, AIDICO, Avda. Benjamn 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 Qumica Inorgnica, Universidad de Mlaga, Campus Teatinos S/N., 29071 Mlaga (Spain) [Departamento de Qumica Inorgnica, Universidad de Mlaga, Campus Teatinos S/N., 29071 Mlaga (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 Qumica Inorgnica, Universidad de Mlaga, Campus Teatinos S/N., 29071 Mlaga (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 yeelimite dissolved at a higher pace than cubic one. Yeelimite larger reaction degree yields stratlingite formation by belite reaction. Rietveld method quantified gypsum, anhydrite and bassanite dissolution rates.

  6. 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...

  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, Universit 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, Universit 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, Universit 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, Universit 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. 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.

  18. 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...

  19. 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...

  20. 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.

  1. 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...

  2. 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.

  3. 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.

  4. 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

    air used for coal combustion and generation of heat withineven the 0.19% CO generation in coal combustion in a highfor power generation) Possible reduction in coal use Coal

  5. 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.

  6. 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...

  7. 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...

  8. 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.

  9. [ ]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

  10. 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 Textile Processing -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

  11. 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.

  12. 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

  13. 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

  14. 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

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

  20. 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

  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

    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

  2. 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.

  3. 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...

  4. 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...

  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. 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 Carbonate cements Stable isotopes Mineral dissolution Miller field Introduction, anorthite, chlorite), however, to provide cations for carbonate formation. Mineral sequestration efficiency

  7. 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.

  8. 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.

  9. 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.

  10. 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

    conversion: 1 kwh = 10,500 Btu for power production Averageelectricity and at 10,500 Btu/kwh or 2,646 kcal/kHz energyHCs Unit Nm3/hr Nm3/hr cfh Btu/scf MM Btu/hr GJ/hr Btu/scf

  11. 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

    The focus of the proposed research will be on exploring the use of nanotechnology-based nano-filaments, such as carbon nanotubes (CNTs) and nanofibers (CNFs), as reinforcement in improving the mechanical properties of portland cement paste as a...

  12. Assessing the effect of cement-steel interface on well casing corrosion in aqueous CO2 environments

    SciTech Connect (OSTI)

    Han, Jiabin [Los Alamos National Laboratory; Carey, James W [Los Alamos National Laboratory; Zhang, Jinsuo [Los Alamos National Laboratory

    2010-01-01T23:59:59.000Z

    CO{sub 2} leakage is a critical safety concern for geologic storage. In wellbore environments, important leakage paths include the rock-cement and cement-casing interfaces. If the cement-casing interface is filled with escaping CO{sub 2}, the well casing directly contacts the CO{sub 2}. This can cause severe corrosion in the presence of water. This paper studies the effect of steel-cement interface gaps, ranging from 1 mm to 0 um, on casing corrosion. Corrosion kinetics were measured employing electrochemical techniques including linear polarization resistance, open circuit potential and electrochemical impedance spectroscopy. The experimental results showed that the corrosion of steel is not significant where the gap between steel and cement is small ({le} 100 {micro}m). Corrosion rates are controlled by the diffusion of corrosive species (H{sub 2}CO{sub 3} and H{sup +}) along the interface. In contrast, steel corrosion is severe in a broad gap where the corrosion process is limited only by the reaction kinetics of steel and corrosive species. The threshold leading to severe corrosion in terms of the cement-steel interface size (100 {micro}m) was determined. Our research clarifies a corrosion scenario at the cement-steel interface. Casing steel corrosion is initiated when attacked by corrosive species at the cement-steel interface. For relatively tight interfaces, this results in a slow thinning of the casing and expansion of the interface width. If the gap increases beyond the critical threshold size, the corrosion rate increases significantly, and a potentially damaging cycle of corrosion and interface expansion is developed.

  13. A literature review of mixed waste components: Sensitivities and effects upon solidification/stabilization in cement-based matrices

    SciTech Connect (OSTI)

    Mattus, C.H.; Gilliam, T.M.

    1994-03-01T23:59:59.000Z

    The US DOE Oak Ridge Field Office has signed a Federal Facility Compliance Agreement (FFCA) regarding Oak Ridge Reservation (ORR) mixed wastes subject to the land disposal restriction (LDR) provisions of the Resource conservation and Recovery Act. The LDR FFCA establishes an aggressive schedule for conducting treatability studies and developing treatment methods for those ORR mixed (radioactive and hazardous) wastes listed in Appendix B to the Agreement. A development, demonstration, testing, and evaluation program has been initiated to provide those efforts necessary to identify treatment methods for all of the wastes that meet Appendix B criteria. The program has assembled project teams to address treatment development needs in a variety of areas, including that of final waste forms (i.e., stabilization/solidification processes). A literature research has been performed, with the objective of determining waste characterization needs to support cement-based waste-form development. The goal was to determine which waste species are problematic in terms of consistent production of an acceptable cement-based waste form and at what concentrations these species become intolerable. The report discusses the following: hydration mechanisms of Portland cement; mechanisms of retardation and acceleration of cement set-factors affecting the durability of waste forms; regulatory limits as they apply to mixed wastes; review of inorganic species that interfere with the development of cement-based waste forms; review of radioactive species that can be immobilized in cement-based waste forms; and review of organic species that may interfere with various waste-form properties.

  14. Feasibility of using reject fly ash in cement-based stabilization/solidification processes

    SciTech Connect (OSTI)

    Poon, C.S.; Qiao, X.C.; Cheeseman, C.R.; Lin, Z.S. [Hong Kong Polytechnic University, Kowloon (China). Dept. of Civil & Structural Engineering

    2006-01-15T23:59:59.000Z

    Stabilization/solidification (s/s) has been routinely used for the final treatment of hazardous wastes prior to land disposal. These processes involve adding one or more solidifying reagents into the waste to transform it into a monolithic solid with improved structural integrity. Cement-based systems with partial replacement by pulverized fuel ash (PFA) have been widely used to minimize leaching of contaminants from hazardous wastes. The finer fraction of PFA ({lt}45 {mu} m, fine fly ash, MA), produced by passing the raw ash through a classifying process is commonly used in s/s processes. Low-grade fly ash is rejected (rFA) from the ash classifying process, and is largely unused due to high carbon content and large particle size but represents a significant proportion of PFA. This paper presents experimental results of a study that has assessed the feasibility of using rFA in the cement-based s/s of a synthetic heavy metal waste. Results were compared to mixes containing fFA. The strength results show that cement-based waste forms with rFA replacement are suitable for disposal at landfill and that the addition of heavy metal sludge can increase the degree of hydration of fly ash and decrease the porosity of samples. Adding Ca(OH){sub 2} and flue gas desulphurization sludge reduces the retarding effect of heavy metals on strength development. The results of the Toxicity Characteristic Leaching Procedure and Dynamic Leach Test show that rFA can be used in cement-based s/s wastes without compromising performance of the product.

  15. A study of immobilization of four heavy metals by solidification/stabilization with portland cement

    E-Print Network [OSTI]

    Trussell, Susan A

    1994-01-01T23:59:59.000Z

    A STUDY OF IMMOBILIZATION OF FOUR HEAUY METALS BY SOLIDIFICATION/STABILIZATION WITH PORTLAND CEMEhK A Thesis by SUSAN ANN TRUSSELL Submitted to Texas AdcM University in partial fulfillment of the requirements for the degree of MASTER... of Immobilization of Four Heavy Metals By Solidification/Stabilization with Portland Cement. (May 1994) Susan Trussell, B. S. , Baylor University; M. A. , Texas ARM University Chair of Advisory Committee: Dr. Bill Batchelor Immobilization of four heavy metals...

  16. 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 Toxicity Characteristic Leaching Procedure (TCLP), a modified version of the Extraction Procedure (m-EP) which assures a constant leachant pH, and a modified TCLP which exposes the samples to the leachant for up to 5 hours. Atomic absorption..., between 0. 15 and 0. 01 pm and less than 0. 01 )lm, respectively) are related to the following: mixing enhancement, precipitation of complex metal compounds and retardation of clinker hydration on addition of metal nitrates to cement, and dissolution...

  17. Effect of Sodium Carboxymethyl Celluloses on Water-catalyzed Self-degradation of 200-degree C-heated Alkali-Activated Cement

    SciTech Connect (OSTI)

    Sugama T.; Pyatina, T.

    2012-05-01T23:59:59.000Z

    We investigated the usefulness of sodium carboxymethyl celluloses (CMC) in promoting self-degradation of 200C-heated sodium silicate-activated slag/Class C fly ash cementitious material after contact with water. CMC emitted two major volatile compounds, CO2 and acetic acid, creating a porous structure in cement. CMC also reacted with NaOH from sodium silicate to form three water-insensitive solid reaction products, disodium glycolate salt, sodium glucosidic salt, and sodium bicarbonate. Other water-sensitive solid reaction products, such as sodium polysilicate and sodium carbonate, were derived from hydrolysates of sodium silicate. Dissolution of these products upon contact with water generated heat that promoted cements self-degradation. Thus, CMC of high molecular weight rendered two important features to the water-catalyzed self-degradation of heated cement: One was the high heat energy generated in exothermic reactions in cement; the other was the introduction of extensive porosity into cement.

  18. Deteriorated hardened cement paste structure analyzed by XPS and {sup 29}Si NMR techniques

    SciTech Connect (OSTI)

    Kurumisawa, Kiyofumi, E-mail: kurumi@eng.hokudai.ac.jp [Faculty of Engineering, Hokkaido University, Japan, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628 (Japan)] [Faculty of Engineering, Hokkaido University, Japan, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628 (Japan); Nawa, Toyoharu [Faculty of Engineering, Hokkaido University, Japan, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628 (Japan)] [Faculty of Engineering, Hokkaido University, Japan, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628 (Japan); Owada, Hitoshi [Radioactive Waste Management Funding and Research Center, 1-15-7 Tsukishima, Chuo-ku, Tokyo (Japan)] [Radioactive Waste Management Funding and Research Center, 1-15-7 Tsukishima, Chuo-ku, Tokyo (Japan); Shibata, Masahito [Taiheiyo Consultant Co., Ltd., 2-4-2, Ohsaku, Sakura-City, Chiba (Japan)] [Taiheiyo Consultant Co., Ltd., 2-4-2, Ohsaku, Sakura-City, Chiba (Japan)

    2013-10-15T23:59:59.000Z

    In this report, X-ray photoelectron spectroscopy (XPS) and {sup 29}Si-MAS-NMR was used for the evaluation of deteriorated hardened cement pastes. The deterioration by ammonium nitrate solution was accompanied by changes in the pore structure as well as by structural changes in the CSH in the hardened cement paste. The CaO/SiO{sub 2} ratio of the CSH decreased with the progress of deterioration, there was also polymerization of the silicate in the CSH. It was confirmed that the degree of polymerization of silicate of the CSH in hardened cement paste can be determined by XPS. It was also shown that the polymerization depends on the structure of the CSH. -- Highlights: The polymerization of silicate of the CSH in the HCP can be observed by XPS. The structure of CSH changed with the degree of calcium leaching. The NMR result about silicate in CSH was in good agreement with the XPS result.

  19. Development of a cement-polymer close-coupled subsurface barrier technology

    SciTech Connect (OSTI)

    Dwyer, B.P. [Sandia National Labs., Albuquerque, NM (United States); Heiser, J. [Brookhaven National Lab., Upton, NY (United States); Stewart, W.; Phillips, S. [Applied Geotechnical Engineering and Construction, Inc., Richland, WA (United States)

    1997-02-01T23:59:59.000Z

    The primary objective of this project was to further develop close-coupled barrier technology for the containment of subsurface waste or contaminant migration. A close-coupled barrier is produced by first installing a conventional cement grout curtain followed by a thin inner lining of a polymer grout. The resultant barrier is a cement polymer composite that has economic benefits derived from the cement and performance benefits from the durable and chemically resistant polymer layer. The technology has matured from a regulatory investigation of issues concerning barriers and barrier materials to a pilot-scale, multiple individual column injections at Sandia National Labs (SNL) to full scale demonstration. The feasibility of this barrier concept was successfully proven in a full scale ``cold site`` demonstration at Hanford, WA. Consequently, a full scale deployment of the technology was conducted at an actual environmental restoration site at Brookhaven National Lab (BNL), Long Island, NY. This paper discusses the installation and performance of a technology deployment implemented at OU-1 an Environmental Restoration Site located at BNL.

  20. Influence of the composition of cement kiln dust on its interaction with fly ash and slag

    SciTech Connect (OSTI)

    Chaunsali, Piyush, E-mail: chaunsa2@illinois.edu [Department of Civil and Environmental Engineering, University of Illinois, Urbana-Champaign, IL 61801 (United States)] [Department of Civil and Environmental Engineering, University of Illinois, Urbana-Champaign, IL 61801 (United States); Peethamparan, Sulapha, E-mail: speetham@clarkson.edu [Department of Civil and Environmental Engineering, Clarkson University, Potsdam, NY 13699 (United States)] [Department of Civil and Environmental Engineering, Clarkson University, Potsdam, NY 13699 (United States)

    2013-12-15T23:59:59.000Z

    Cement kiln dust (CKD), a by-product of the cement industry, contains significant amounts of alkali, free lime, chloride and sulfate. Wide variation reported in the chemical composition of CKDs limits their potential application as a sustainable binder component in concrete. In the current study, the performance of two different CKDs as components in a novel binder is evaluated. Several binders are developed by blending CKDs with fly ash or slag. Binders with 70% CKD were prepared at a water-to-binder ratio of 0.4, and heat-cured at 75 C to accelerate the strength development. The hydration progress was monitored using X-ray diffraction, and morphological examination was performed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Ettringite and calcium aluminosilicate hydrate (C-A-S-H) were identified as the main hydration products in the hardened binder system. Strength development of CKD-based binder was found to be significantly influenced by its free lime and sulfate contents. -- Highlights: Interaction of cement kiln dust with fly ash and slag was explored. CKD with higher free lime and sulfate content increased the strength of binder. C-S-H like reaction gel with fibrillar morphology is observed in CKD-based binders.

  1. 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

    no date. Integrated Solid Waste Management. Presentationincineration of Municipal Solid Waste in Cement Industry. :Conference on Sustainable Solid Waste Management, Chennai,

  2. 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

    Co-processing Municipal Solid Waste and Sewage Sludge in theno date. Integrated Solid Waste Management. Presentationincineration of Municipal Solid Waste in Cement Industry. :

  3. The marginal leakage of some dental cements in humans: a PIXE-microbeam approach

    SciTech Connect (OSTI)

    Zadro, A.; Passi, P. [Dental School, Department of Dental Materials, University of Padua (Italy); Cavalleri, G. [Dental School, Department of Restorative Dentistry, University of Verona (Italy); Galassini, S.; Moschini, G.; Rossi, P. [INFN, Laboratori Nazionali di Legnaro (Italy)

    1999-06-10T23:59:59.000Z

    The marginal leakage and water absorption of dental cements and restorative materials has been investigated by many authors with several techniques, some of which led to valid results. However, no technique could give, by itself, information both on leakage and water absorption, as these measurements usually need different investigations. PIXE micro beam offers the possibility of investigating these two aspects at the same time, since it is possible to map a proper marker element. In the present study, cavities were made on 50 extracted human molars, then filled with five different temporary cements (IRM, Cavit W, Kalsogen, Fermit N, SuperEBA). The filled teeth were placed into a 5% silver nitrate solution, and after three days, one, two, three and four weeks were examined. The samples for microPIXE were prepared after embedding the teeth in epoxy resin, and sectioning and grinding them down to a thickness of about 1 mm. The sections were placed on metal holders, and examined with a scanning proton {mu}beam, in Legnaro (Italy) at the AN2000 LAB of INFN National Laboratories. The beam consisted of 2.4 MeV protons, it had a cross section of 1.5 micron in diameter and typical currents of the order of some {mu}A were used. The maps were obtained by an 'ad hoc' software with a McIntosh personal computer. Mapping of silver allowed to evaluate both the marginal leakage and the water absorption for each cement. The samples filled with Cavit W showed a great infiltration, as the tracing element was found in the cement bulk, along the margins and inside the cavity, while those filled with IRM and Kalsogen presented only a deposition of the tracing solution on the cement surface. SuperEBA showed a poor resistance against microleakage, because the marker element was only detected along the cavity margins. Fermit N showed the best marginal integrity, and on its surface no traces of siver were found. In this case the better resistance may be due to the resin present in the composition of the material.

  4. Effect of pyrolyzed carbon black on asphalt cement. Part 2. Asphalt binder. Final report, September 1993-May 1995

    SciTech Connect (OSTI)

    Zeng, Y.; Lovell, C.W.

    1996-02-20T23:59:59.000Z

    Scrap tires derived from automobiles have become a large environmental problem in the United States. In the study, research is carried out to investigate the potential use of tire-derived pyrolyzed carbon black from scrap tires as an asphalt cement modifier. The asphlat cements used in the research were AC10 and AC20. Penetration and softening point tests were performed to obtain the consistency of the asphalt cements. The pyrolyzed carbon black, as provided by Wolf Industries, was combined with the asphalt cement in the following percentages: 5%, 10%, 15% and 20%. Penetration, softening point and ductility tests were performed to determine the temperature susceptibility of the modified binder as altered by the pyrolyzed carbon black. In order that the results are comparable to previous testing, commercial carbon black purchased from CABOT Industry was also used as a modifier in the tests. The same test procedures were applied to the asphalt cements modified by commercial carbon black. The test results contained in the report illustrate the viability of the pyrolyzed carbon black as an asphalt modifier. Recommendations are provided to facilitate further research on this particular project. A preliminary assessment of a test road using the pyrolyzed carbon is appended.

  5. Calcite cemented layers, their characterization and use in improving reservoir recovery from Murchison field, northern North Sea

    SciTech Connect (OSTI)

    Warrender, J.M. (Conoco Ltd., Aberdeen (United Kingdom)); Spears, D.A. (Univ. of Sheffield (United Kingdom))

    1991-08-01T23:59:59.000Z

    Murchison field is a mature development forming part of the Brent oil province in the East Shetland basin, northern North Sea. The productive reservoir consists of coastal deltaic sands of the Middle Jurassic Brent Group and is produced by a line-drive waterflood mechanism. The Rannoch Formation in Murchison, one of the field's most prolific producing zones, is characterized by the presence of calcite-cemented zones, known locally as doggers, which occlude all porosity and behave as vertical barriers to fluid flow. Geochemical-mineralogical analysis of the carbonate cements allied to sedimentological studies of host sandstone indicate that they occur as continuously cemented layers with relatively homogeneous compositions. Dogger occurrence is generally confined to the upper parts of individual coarsening-upward confined to the upper parts of individual coarsening-upward profile and sand bodies, characterized by low detrital clay and mica contents, low bioturbation, and high pre-cementation porosites and permeabilities. The carbonate bands are thus thought to represent zones of maximum pore water flow through high permeability conduits during burial diagenesis. Wireline correlation supported by core description indicates that at least three significant, laterally continuous calcite-cemented zones occur, the most extensive of which has a lateral extent of at least 5 km. All significant doggers have been mapped geologically and incorporated into the full-field reservoir simulation model. Based on this new understanding, a revised infill drilling and perforation strategy has been devised for the Rannoch Formation, aimed at improving recovery from this complex reservoir zone.

  6. Process Flow Chart for Immobilizing of Radioactive High Concentration Sodium Hydroxide Product from the Sodium Processing Facility at the BN-350 Nuclear power plant in Aktau, Kazakhstan

    SciTech Connect (OSTI)

    Burkitbayev, M.; Omarova, K.; Tolebayev, T. [Ai-Farabi Kazakh National University, Chemical Faculty, Republic of Kazakhstan (Kazakhstan); Galkin, A. [KATEP Ltd., Republic of Kazakhstan (Kazakhstan); Bachilova, N. [NIISTROMPROEKT Ltd., Republic of Kazakhstan (Kazakhstan); Blynskiy, A. [Nuclear Technology Safety Centre, Republic of Kazakhstan (Kazakhstan); Maev, V. [MAEK-Kazatomprom Ltd., Republic of Kazakhstan (Kazakhstan); Wells, D. [NUKEM Limited- a member of the Freyssinet Group, Winfrith Technology Centre, Dorchester, Dorset (United Kingdom); Herrick, A. [NUKEM Limited- a member of the Freyssinet Group, Caithness (United Kingdom); Michelbacher, J. [Idaho National Laboratory, Idaho Falls (United States)

    2008-07-01T23:59:59.000Z

    This paper describes the results of a joint research investigations carried out by the group of Kazakhstan, British and American specialists in development of a new material for immobilization of radioactive 35% sodium hydroxide solutions from the sodium coolant processing facility of the BN-350 nuclear power plant. The resulting solid matrix product, termed geo-cement stone, is capable of isolating long lived radionuclides from the environment. The physico-mechanical properties of geo-cement stone have been investigated and the flow chart for its production verified in a full scale experiments. (author)

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

    E-Print Network [OSTI]

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

  8. Techno-economic study of CO{sub 2} capture from an existing cement plant using MEA scrubbing

    SciTech Connect (OSTI)

    Hassan, S.M.N.; Douglas, P.L.; Croiset, E. [University of Waterloo, Waterloo, ON (Canada). Dept. of Chemical Engineering

    2007-03-15T23:59:59.000Z

    Carbon dioxide is the major greenhouse gas responsible for global warming. Man-made CO{sub 2} emissions contribute approximately 63% of greenhouse gases and the cement industry is responsible for approximately 5% of CO{sub 2} emissions emitting nearly 900 kg of CO{sub 2} per 1000 kg of cement. CO{sub 2} from a cement plant was captured and purified to 98% using the monoethanolamine (MEA) based absorption process. The capture cost was $51 per tonne of CO{sub 2} captured, representing approximately 90% of total cost. Steam was the main operating cost representing 39% of the total capture cost. Switching from coal to natural gas reduces CO{sub 2} emissions by about 18%. At normal load, about 36 MW of waste heat is available for recovery to satisfy the parasitic heat requirements of MEA process; however, it is very difficult to recover.

  9. Techno-economic study of CO{sub 2} capture from an existing cement plant using MEA scrubbing

    SciTech Connect (OSTI)

    S.M. Nazmul Hassan; Peter L. Douglas; Eric Croiset [University of Waterloo, Waterloo, ON (Canada). Department of Chemical Engineering

    2007-03-15T23:59:59.000Z

    Carbon dioxide is the major greenhouse gas responsible for global warming. Man-made CO{sub 2} emissions contribute approximately 63% of greenhouse gases and the cement industry is responsible for approximately 5% of CO{sub 2} emissions emitting nearly 900 kg of CO{sub 2} per 1000 kg of cement. CO{sub 2} from a cement plant was captured and purified to 98% using the monoethanolamine (MEA) based absorption process. The capture cost was $51 per tonne of CO{sub 2} captured, representing approximately 90% of total cost. Steam was the main operating cost representing 39% of the total capture cost. Switching from coal to natural gas reduces CO{sub 2} emissions by about 18%. At normal load, about 36 MW of waste heat is available for recovery to satisfy the parasitic heat requirements of MEA process; however, it is very difficult to recover. 18 refs.

  10. Evaluation of Gel Permeation Chromatography as an analytical tool for aspect cement testing

    E-Print Network [OSTI]

    Holmgreen, Richard J

    1985-01-01T23:59:59.000Z

    : . Dona S a (Chairman f Committee) Dr. D. N. Litt e (Member) Jer y A. Bullin ember) Dr. Dona d McDonald (Head of Department) May 1985 ABSTRACT Evaluation of Gel Permeation Chromatography as an Analytical Tool for Asphalt Cement Testing (Nay..., Common to Dickens and Dumas 35 36 37 39 15 Chromatograms of Virgin Asphalt E, AC-10, Common to Dickens and Dumas 40 16 Chromatograms of' Virgin Asphalt 8, AC-20, Common to Dickens and Lufkin 41 F iciure 17 18 19 20 21 22 23 24 25 26 27...

  11. Video observation of Geminids 2010 and Quadrantids 2011 by SVMN and CEMeNt

    E-Print Network [OSTI]

    Tth, Jutaj; Korno, Leonard; Piffl, Roman; Koukal, Jakub; Gajdo, tefan; Majchrovi?, Ivan; Zigo, Pavol; Zima, Martin; Vilgi, Jozef; Kalman?ok, Duan

    2011-01-01T23:59:59.000Z

    Since 2009 the double station meteor observation by the all-sky video cameras of the Slovak Video Meteor Network (SVMN) brought hundreds of orbits. Thanks to several amateur wide field video stations of the Central European Meteor Network (CEMeNt) and despite not an ideal weather situation we were able to observe several Geminid and Quadrantid multi-station meteors during its 2010 and 2011 maxima, respectively. The presented meteor orbits derived by the UFOOrbit software account a high precision of the orbital elements and are very similar to those of the SonotaCo video meteor database.

  12. Controlling the set of carbon-fiber embedded cement with electric current

    DOE Patents [OSTI]

    Mattus, Alfred J.

    2004-06-15T23:59:59.000Z

    A method for promoting cement or concrete set on demand for concrete that has been chemically retarded by adding carbon fiber to the concrete, which enables it to become electrically conductive, sodium tartrate retardant, and copper sulfate which forms a copper tartrate complex in alkaline concrete mixes. Using electricity, the concrete mix anodically converts the retarding tartrate to an insoluble polyester polymer. The carbon fibers act as a continuous anode surface with a counter electrode wire embedded in the mix. Upon energizing, the retarding effect of tartrate is defeated by formation of the polyester polymer through condensation esterification thereby allowing the normal set to proceed unimpeded.

  13. Alkali-aggregate reaction in concrete containing high-alkali cement and granite aggregate

    SciTech Connect (OSTI)

    Owsiak, Z

    2004-01-01T23:59:59.000Z

    The paper discusses results of the research into the influence of high-alkali Portland cement on granite aggregate. The deformation of the concrete structure occurred after 18 months. The research was carried out by means of a scanning electron microscope equipped with a high-energy dispersive X-ray analyzer that allowed observation of unpolished sections of concrete bars exhibiting the cracking pattern typical of the alkali-silica reaction. Both the microscopic observation and the X-ray elemental analysis confirm the presence of alkali-silica gel and secondary ettringite in the cracks.

  14. Carbonation Behavior of Pure Cement Hydrates under Supercritical Carbon Dioxide Conditions - 12199

    SciTech Connect (OSTI)

    Hirabayashi, Daisuke; Enokida, Youichi [Graduate School of Engineering, Nagoya University, 1 Furo-cho, Chikusa-ku, Nagoya-shi, Aichi-ken, 464-8603 (Japan); Sawada, Kayo [EcoTopia Science Institute, Nagoya University, 1 Furo-cho, Chikusa-ku, Nagoya-shi, Aichi-ken, 464-8603 (Japan); Hertz, Audrey; Charton, Frederic [CEA, DEN, Marcoule, DTCD/SPDE/L2ED, BP 17171, F-30207 Bagnols-sur-Ceze (France); Frizon, Fabien [CEA, DEN, Marcoule, DTCD/SPDE/LFSM, BP 17171, F-30207 Bagnols-sur-Ceze (France); Brouno, Fournel [CEA, DEN, Marcoule, DTCD, BP 17171, F-30207 Bagnols-sur-Ceze (France)

    2012-07-01T23:59:59.000Z

    Carbonation of cement-based waste forms using a supercritical carbon dioxide (SCCO{sub 2}) is a developing technology for the waste immobilization of radioactive and non-radioactive wastes. However, the detail carbonation behaviors of cement matrices under the SCCO{sub 2} condition are unknown, since cement matrices forms very complex phases. In this study, in order to clarify the crystal phases, we synthesized pure cement hydrate phases as each single phases; portlandite (Ca(OH){sub 2}), ettringite (Ca{sub 6}Al{sub 2}(SO{sub 4}){sub 3}(OH){sub 12}.26H{sub 2}O), and calcium silicate hydrate (n CaO---m SiO{sub 2} ---x H{sub 2}O), using suspensions containing a stoichiometric mixture of chemical regents, and performed carbonation experiments using an autoclave under supercritical condition for carbon dioxide. The XRD results revealed both the carbonate phases and co-product phases depending on the initial hydrate phases; gypsum for Ettringite, amorphous or crystalline silica for calcium silicate hydroxide. Thermogravimetric analysis was also performed to understand carbonation behaviors quantitatively. According to the experimental results, it was found that the major reaction was formation of calcium carbonate (CaCO{sub 3}) in all cases. However, the behaviors of H{sub 2}O and CO{sub 2} content were quietly different: Portlandite was most reactive for carbonation under SCCO{sub 2} conditions, and the CO{sub 2} content per one molar CaO was ranged from 0.96 ? 0.98. In the case of Ettringite, the experiment indicates partial decomposition of ettringite phase during carbonation. Ettringite was comparatively stable even under the SCCO{sub 2} conditions. Therefore, a part of ettringite remained and formed similar phases after the ettringite carbonation. The CO{sub 2} content for ettringite showed almost constant values around 0.86 ? 0.87. In the case of calcium silicate hydrate, the carbonation behavior was significantly influenced by the condition of SCCO{sub 2}. The CO{sub 2} content for the calcium silicate hydrate had values that ranged from 0.51 ? 1.01. The co-products of the carbonation were gypsum (CaSO{sub 4}) for ettringite, silica gel (SiO{sub x}) and silica (SiO{sub 2}) for calcium silicate hydrate, which also contributed to the densification of the particles. The production of co-products enhanced the change to their morphology after the carbonation. (authors)

  15. Cement kiln flue dust as a source of lime and potassium in four East Texas soils

    E-Print Network [OSTI]

    Poole, Warren David

    1975-01-01T23:59:59.000Z

    (18) a 5. 3 (84) a 4. 8 (76) a 4. 2 (66) a 3. 8 (61) a 5. 2 (82) a 4. 1 (64) a 5. 0 (80) a *Duncan's Multiple Range Test. ? = . 05. Differences in yield due to rate of applied lime material followed by the same letter are not significantly...CEMENT KILN FLUE DUST AS A SOURCE OF LIME AND POTASSIUM IN FOUR EAST TEXAS SOILS A Thesis by WARREN DAVID POOLE Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER...

  16. Manufacturing Energy and Carbon Footprint - Sector: Cement (NAICS 327310), January 2014 (MECS 2010)

    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 ofLetterEconomyDr.EnergyManufacturingAll ManufacturingCement

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

    SciTech Connect (OSTI)

    Galitsky, Christina; Worrell, Ernst; Galitsky, Christina

    2008-01-01T23:59:59.000Z

    The cost of energy as part of the total production costs in the cement industry is significant, warranting attention for energy efficiency to improve the bottom line. Historically, energy intensity has declined, although more recently energy intensity seems to have stabilized with the gains. Coal and coke are currently the primary fuels for the sector, supplanting the dominance of natural gas in the 1970s. Most recently, there is a slight increase in the use of waste fuels, including tires. Between 1970 and 1999, primary physical energy intensity for cement production dropped 1 percent/year from 7.3 MBtu/short ton to 5.3 MBtu/short ton. Carbon dioxide intensity due to fuel consumption and raw material calcination dropped 16 percent, from 609 lb. C/ton of cement (0.31 tC/tonne) to 510 lb. C/ton cement (0.26 tC/tonne). Despite the historic progress, there is ample room for energy efficiency improvement. The relatively high share of wet-process plants (25 percent of clinker production in 1999 in the U.S.) suggests the existence of a considerable potential, when compared to other industrialized countries. We examined over 40 energy efficient technologies and measures and estimated energy savings, carbon dioxide savings, investment costs, and operation and maintenance costs for each of the measures. The report describes the measures and experiences of cement plants around the wold with these practices and technologies. Substantial potential for energy efficiency improvement exists in the cement industry and in individual plants. A portion of this potential will be achieved as part of (natural) modernization and expansion of existing facilities, as well as construction of new plants in particular regions. Still, a relatively large potential for improved energy management practices exists.

  18. CEMENT and CONCRETE RESEARCH. Vol. 21, pp. 147-157, 1991. Printed in the USA. 0008-8846/91. $3.00+00. Copyright (e) 1991 PergamonPress pie.

    E-Print Network [OSTI]

    Mobasher, Barzin

    CEMENT and CONCRETE RESEARCH. Vol. 21, pp. 147-157, 1991. Printed in the USA. 0008-8846/91. $3 OF EXPANSIVE-CEMENT PASTE Menashi D. Cohen and Barzin Mobasher* School of Civil Engineering Purdue University and between expansive-clinker content and expansion time in expansive-cement pastes. Generally, as the amount

  19. A. Peled, and B. Mobasher, "Cement Based Pultruded Composites with Fabrics," Proceedings,7th International Symposium on Brittle Matrix Composites (BMC7), Warsaw, Poland, pp. 505-514, 2003.

    E-Print Network [OSTI]

    Mobasher, Barzin

    A. Peled, and B. Mobasher, "Cement Based Pultruded Composites with Fabrics," Proceedings,7th TECHNOLOGY FOR THE PRODUCTION OF FABRIC-CEMENT COMPOSITES (a) Alva PELED and (b) Barzin MOBASHER (a-mail:barzin@asu.edu ABSTRACT Use of reinforcement in thin cement based elements is essential in order to improve the tensile

  20. Cement and Concrete Research, 2010, 40(2), 242-252, doi:10.1016/j.cemconres.2009.10.008 SSSooommmeee aaassspppeeeccctttsss ooofff ccceeelllllluuulllooossseee eeettthhheeerrrsss iiinnnfffllluuueeennnccceee ooonnn wwwaaattteeerrr tttrrraaannnssspppooorrrttt

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Cement and Concrete Research, 2010, 40(2), 242-252, doi:10.1016/j.cemconres.2009.10.008 1 of cement-based materials in both fresh and hardened state. Investigations of the porous network (mercury, factory-made mortars are mainly composed of mineral binders (cement, lime and/or gypsum), sands

  1. Cement and Concrete Research, 2010, 40(2), 179-188, doi:10.1016/j.cemconres.2009.10.008 CCChhhaaannngggeeesss iiinnn CCC333SSS hhhyyydddrrraaatttiiiooonnn iiinnn ppprrreeessseeennnccceee ooofff ccceeelllllluuulllooossseee eeettthhheeerrrsss

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Cement and Concrete Research, 2010, 40(2), 179-188, doi:10.1016/j.cemconres.2009.10.008 1 of the retarding effect of cellulose ethers on the cement hydration kinetics. In this frame, the impacts of various in the case of both cement and C3S hydration. CE adsorption behavior clearly highlighted a chemical structure

  2. Cement and Concrete Research, 2010, 40(9),1378-1385, doi:10.1016/j.cemconres.2010.04.001 AAA pppuuulllssseeeddd fffiiieeelllddd gggrrraaadddiiieeennnttt aaannnddd NNNMMMRRR iiimmmaaagggiiinnnggg iiinnnvvveeessstttiiigggaaatttiiiooonnnsss ooofff ttthhheee

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Cement and Concrete Research, 2010, 40(9),1378-1385, doi:10.1016/j.cemconres.2010.04.001 1 AAA-diffusion coefficient of water in solution and on the water mobility between two fresh cement pastes was studied solution or in admixed cement pastes. Moreover the interdiffusion imaging experiments demonstrated

  3. Cement and Concrete Research, 2005, 35(11), 2081-2086, doi:10.1016/j.cemconres.2004.05.052 TTThhheee iiinnnfffllluuueeennnccceee ooofff wwwooooooddd aaaqqquuueeeooouuusss eeexxxtttrrraaaccctttiiivvveeesss ooonnn ttthhheee hhhyyydddrrraaatttiiiooonnn

    E-Print Network [OSTI]

    Boyer, Edmond

    Cement and Concrete Research, 2005, 35(11), 2081-2086, doi:10.1016/j.cemconres.2004.05.052 1 of mineral binders (cement, concrete or plaster) has been a matter of major concern for several decades (called `extractives') which could delay the setting of cement [11], [12], [13] and [14]. In some other

  4. Cement and Concrete Research, 2009, 39(2), 664-669, doi:10.1016/j.cemconres.2009.05.009 CCCuuurrrrrreeennnttt uuunnndddeeerrrssstttaaannndddiiinnnggg ooofff ccceeelllllluuulllooossseee eeettthhheeerrrsss iiimmmpppaaacccttt ooonnn ttthhheee

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Cement and Concrete Research, 2009, 39(2), 664-669, doi:10.1016/j.cemconres.2009.05.009 1 on cement hydration. In this sense, we successively studied the CE adsorption on ettringite and calcium material. However, as a side effect, CE may also induce a more or less important slowing down of cement

  5. Cement and Concrete Composites, 2006, 28(1), 12-20, doi:10.1016/j.cemconcomp.2005.09.002 MMMooodddiiifffiiicccaaatttiiiooonnn ooofff ccceeemmmeeennnttt hhhyyydddrrraaatttiiiooonnn aaattt eeeaaarrrlllyyy aaagggeeesss bbbyyy nnnaaatttuuurrraaalll aaannnddd

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Cement and Concrete Composites, 2006, 28(1), 12-20, doi:10.1016/j.cemconcomp.2005.09.002 1 are widely used for the reduction of wood swelling and dimensional instability of woodcement composites. The effect of natural and heated wood on the hydration of cement at early ages was investigated by isothermal

  6. Cement and Concrete Research, 2010, 41(1),46-55, doi:10.1016/j.cemconres.2010.09.004 CCCeeelllllluuulllooossseee eeettthhheeerrrsss iiinnnfffllluuueeennnccceee ooonnn wwwaaattteeerrr rrreeettteeennntttiiiooonnn aaannnddd cccooonnnsssiiisssttteeennncccyyy

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Cement and Concrete Research, 2010, 41(1),46-55, doi:10.1016/j.cemconres.2010.09.004 1 (CE) are commonly used as additives to improve the quality of cement-based materials. As admixtures. The properties of cement-based mortars at fresh state were investigated. The effect of CE and their physico

  7. CEMENT and CONCRETE RESEARCH, Vol.20, pp. 540-558, 1990. Printed in the USA. 0008-884-6/90. $3.00+00. Copyright (c) 1990 Pergamon Press plc.

    E-Print Network [OSTI]

    Mobasher, Barzin

    CEMENT and CONCRETE RESEARCH, Vol.20, pp. 540-558, 1990. Printed in the USA. 0008-884-6/90. $3, 1989) ABSTRACT An automatic algorithm for microcrack characterization in cement- based materials of Civil Engineering, Director of NSF Science and Technological Center for Advanced Cement-Based Materials

  8. Cement and Concrete Composites, 1999, 21(2), 99-105, doi:10.1016/S0958-9465(98)00020-1 IIInnnfffllluuueeennnccceee ooofff fffiiinnneeelllyyy gggrrrooouuunnnddd llliiimmmeeessstttooonnneee ooonnn ccceeemmmeeennnttt hhhyyydddrrraaatttiiiooonnn

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Cement and Concrete Composites, 1999, 21(2), 99-105, doi:10.1016/S0958-9465(98)00020-1 1 been carried out on the effect of calcium carbonate on cement paste, but there is no general agreement on the relative effects of different amounts of calcium carbonate on cement paste properties. The objective

  9. An evaluation of the carbonate cements and their diagenesis on selected banks, outer Continental Shelf: northern Gulf of Mexico

    E-Print Network [OSTI]

    Stafford, John Michael

    1982-01-01T23:59:59.000Z

    solutions were exact replicates of Mg-calcites formed within the marine environment. Th1s implies that the 20 composition of the cement cannot be determined on the basis of crystal morphology alone (Badiozamani et al, 1977). The literature on carbonate... in that needle-fiber cements are the needles of calcite growing on minute root hairs (Ward, 1975). Care should be taken not to confuse the two. ~S he uiitic c me ts are also aao ite cemeets. The eedias th t comprise the cone shaped bundles are from 1-5 u wide...

  10. Hydration of a low-alkali CEM III/B-SiO{sub 2} cement (LAC)

    SciTech Connect (OSTI)

    Lothenbach, Barbara, E-mail: barbara.lothenbach@empa.ch [Empa, Laboratory for Concrete and Construction Chemistry, CH-8600 Duebendorf (Switzerland); Le Saout, Gwenn; Ben Haha, Mohsen; Figi, Renato [Empa, Laboratory for Concrete and Construction Chemistry, CH-8600 Duebendorf (Switzerland); Wieland, Erich [PSI, Laboratory for Waste Management, CH-5232 Villigen PSI (Switzerland)

    2012-02-15T23:59:59.000Z

    The hydration of a low-alkali cement based on CEM III/B blended with 10 wt.% of nanosilica has been studied. The nanosilica reacted within the first days and 90% of the slag reacted within 3.5 years. C-S-H (Ca/Si {approx} 1.2, Al/Si {approx} 0.12), calcite, hydrotalcite, ettringite and possibly straetlingite were the main hydrates. The pore water composition revealed ten times lower alkali concentrations than in Portland cements. Reducing conditions (HS{sup -}) and a pH value of 12.2 were observed. Between 1 month and 3.5 years of hydration more hydrates were formed due to the ongoing slag reaction but no significant differences in the composition of the pore solution or solid phase assemblage were observed. On the basis of thermodynamic calculations it is predicted that siliceous hydrogarnet could form in the long-term and, in the presence of siliceous hydrogarnet, also thaumasite. Nevertheless, even after 3.5 year hydration, neither siliceous hydrogarnet nor thaumasite have been observed.

  11. 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.

  12. BLENDED CALCIUM ALUMINATE-CALCIUM SULFATE CEMENT-BASED GROUT FOR P-REACTOR VESSEL IN-SITU DECOMMISSIONING

    SciTech Connect (OSTI)

    Langton, C.; Stefanko, D.

    2011-03-10T23:59:59.000Z

    The objective of this report is to document laboratory testing of blended calcium aluminate - calcium hemihydrate grouts for P-Reactor vessel in-situ decommissioning. Blended calcium aluminate - calcium hemihydrate cement-based grout was identified as candidate material for filling (physically stabilizing) the 105-P Reactor vessel (RV) because it is less alkaline than portland cement-based grout which has a pH greater than 12.4. In addition, blended calcium aluminate - calcium hemihydrate cement compositions can be formulated such that the primary cementitious phase is a stable crystalline material. A less alkaline material (pH {<=} 10.5) was desired to address a potential materials compatibility issue caused by corrosion of aluminum metal in highly alkaline environments such as that encountered in portland cement grouts [Wiersma, 2009a and b, Wiersma, 2010, and Serrato and Langton, 2010]. Information concerning access points into the P-Reactor vessel and amount of aluminum metal in the vessel is provided elsewhere [Griffin, 2010, Stefanko, 2009 and Wiersma, 2009 and 2010, Bobbitt, 2010, respectively]. Radiolysis calculations are also provided in a separate document [Reyes-Jimenez, 2010].

  13. Experimental Evidence for Self-Limiting Reactive Flow through a Fractured Cement Core: Implications for Time-Dependent Wellbore Leakage

    SciTech Connect (OSTI)

    Huerta, Nicolas J.; Hesse, Marc A.; Bryant, Steven L.; Strazisar, Brian R; Lopano, Christina L.

    2013-01-01T23:59:59.000Z

    We present a set of reactive transport experiments in cement fractures. The experiments simulate coupling between flow and reaction when acidic, CO{sub 2}-rich fluids flow along a leaky wellbore. An analog dilute acid with a pH between 2.0 and 3.15 was injected at constant rate between 0.3 and 9.4 cm/s into a fractured cement core. Pressure differential across the core and effluent pH were measured to track flow path evolution, which was analyzed with electron microscopy after injection. In many experiments reaction was restricted within relatively narrow, tortuous channels along the fracture surface. The observations are consistent with coupling between flow and dissolution/precipitation. Injected acid reacts along the fracture surface to leach calcium from cement phases. Ahead of the reaction front, high pH pore fluid mixes with calcium-rich water and induces mineral precipitation. Increases in the pressure differential for most experiments indicate that precipitation can be sufficient to restrict flow. Experimental data from this study combined with published field evidence for mineral precipitation along cemented annuli suggests that leakage of CO{sub 2}-rich fluids along a wellbore may seal the leakage pathway if the initial aperture is small and residence time allows mobilization and precipitation of minerals along the fracture.

  14. 98 OCTOBER 2003 / Concrete international The Center for Advanced Cement-Based Materials (ACBM) is a consortium of

    E-Print Network [OSTI]

    98 OCTOBER 2003 / Concrete international The Center for Advanced Cement-Based Materials (ACBM the hydration of concrete. ACBM's Industrial Partners and Northwestern University's Infra- structure Technology to track the very early age hydration of concrete and provide accurate measurements of maturity

  15. Porous, Biphasic CaCO3-Calcium Phosphate Biomedical Cement Scaffolds from Calcite (CaCO3) Powder

    E-Print Network [OSTI]

    Tas, A. Cuneyt

    Porous, Biphasic CaCO3-Calcium Phosphate Biomedical Cement Scaffolds from Calcite (CaCO3) Powder A porous, biocompatible, and resorb- able materials. Commercially available CaCO3 powders were physically crystallographically and spectroscopically resembled calcium hydroxyapatite. Upon mixing CaCO3 powders and the setting

  16. Development programs in the United States of America for the application of cement-based grouts in radioactive waste management

    SciTech Connect (OSTI)

    Dole, L.R.; Row, T.H.

    1984-01-01T23:59:59.000Z

    This paper briefly reviews seven cement-based waste form development programs at six of the US Department of Energy (DOE) sites. These sites have developed a variety of processes that range from producing 25 mm (1 in.) diameter pellets in a glove box to producing 240 m (800 ft.) diameter grout sheets within the bedding planes of a deep shale formation. These successful applications of cement-based waste forms to the many radioactive waste streams from nuclear facilities bear witness to the flexibility and reliability of this class of materials. This paper also discusses the major issues regarding the application of cement-based waste forms to radioactive waste management problems. These issues are (1) leachability, (2) radiation stability, (3) thermal stability, (4) phase complexity of the matrix, and (5) effects of the waste stream composition. A cursory review of current research in each of these areas is given This paper also discusses future trends in cement-based waste form development and applications. 31 references, 11 figures.

  17. Recent technologies and processes for enhanced safety in bitumen or cement solidification of Li/ml radwaste

    SciTech Connect (OSTI)

    Tchemitcheff, F.

    1993-12-31T23:59:59.000Z

    SGN has more than 20 years of experience in the treatment of low and medium level radioactive wastes. SGN industrialized two major types of radwaste processes: bituminization and cement solidification. The R&D work on these two processes is discussed.

  18. Methodological and Practical Considerations for Developing Multiproject Baselines for Electric Power and Cement Industry Projects in Central America

    E-Print Network [OSTI]

    Murtishaw, Scott; Sathaye, Jayant; Galitsky, Christina; Dorion, Kristel

    2008-01-01T23:59:59.000Z

    energy projects (small hydro and bagasse co-generators) andPCF) in Guatemala for a small hydro project assumes that the

  19. Methodological and Practical Considerations for Developing Multiproject Baselines for Electric Power and Cement Industry Projects in Central America

    E-Print Network [OSTI]

    Murtishaw, Scott; Sathaye, Jayant; Galitsky, Christina; Dorion, Kristel

    2008-01-01T23:59:59.000Z

    energy projects. Several bagasse cogeneration and hydroprojects (small hydro and bagasse co-generators) and 201 MWgrid. These facilities burn bagasse when it is available and

  20. Nuclear Power

    E-Print Network [OSTI]

    Vilhena and Bardo E.J. Bodmann Carbon-#1;? in Terrestrial and Aquatic Environment of Ignalina Nuclear Power Plant: Sources of Production, Releases and Dose Estimates #3;?? Jonas Mazeika Impact of radionuclide discharges from Temel?n Nuclear Power... (chapter 5), ? Instrumentation and control (chapter 6), ? Diagnostics (chapter 7), ? Safety evaluation methods (chapters 6, 8, 9 and 10), ? Environment and nuclear power plants (chapters 11 - 15), ? Human factors (chapter 16), ? Software development...

  1. Power LCAT

    ScienceCinema (OSTI)

    Drennen, Thomas

    2014-06-27T23:59:59.000Z

    POWER LCAT is a software tool used to compare elements of efficiency, cost, and environmental effects between different sources of energy.

  2. Power LCAT

    SciTech Connect (OSTI)

    Drennen, Thomas

    2012-08-15T23:59:59.000Z

    POWER LCAT is a software tool used to compare elements of efficiency, cost, and environmental effects between different sources of energy.

  3. Electrical Engineering University of California, Riverside

    E-Print Network [OSTI]

    Areas and Technical Electives Intelligent Systems (IS) EE141 Digital Signal Processing EE128 Data Lab EE141 Digital Signal Processing EE160 Fiber Optic Communication Systems Communications and Signal Processing (CSP) EE141 Digital Signal Processing EE117 Electromagnetics-II EE128 Data Acquisition and Process

  4. Electrical Engineering University of California, Riverside

    E-Print Network [OSTI]

    (CSP) EE141 Digital Signal Processing EE117 Electromagnetics-II EE128 Data Acquisition and Process EE150 Digital Communications EE152 Image Processing EE160 Fiber Optic Communication Systems Controls Electives and New CoursesTechnical Electives and New Courses Intelligent Systems (IS) EE141 Digital Signal

  5. Riverside Electric Cooperative | 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 being directedAnnualProperty Edit with form HistoryRistma AG Jump to: navigation, search Name:

  6. Riverside Technologies Inc | 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:Ezfeedflag JumpID-f < RAPID‎ |Rippey Jump to: navigation, search Name

  7. Riverside Public Utilities - Energy Efficiency Construction Incentive |

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

    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 742EnergyOn April 23, 2014, anEnergy nepdg_5251_5500.pdfAnalysisRichardRisk Management

  8. Riverside, California: Energy Resources | 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 YouKizildere IRaghuraji Agro Industries Pvt Ltd Jump to: navigation,Maze -RichtonMissouri:Park,EnergyCalifornia: Energy

  9. Riverside, Illinois: Energy Resources | 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 YouKizildere IRaghuraji Agro Industries Pvt Ltd Jump to: navigation,Maze -RichtonMissouri:Park,EnergyCalifornia:

  10. Riverside, Maryland: Energy Resources | 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 YouKizildere IRaghuraji Agro Industries Pvt Ltd Jump to: navigation,Maze -RichtonMissouri:Park,EnergyCalifornia:Maryland:

  11. Riverside, Ohio: Energy Resources | 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 YouKizildere IRaghuraji Agro Industries Pvt Ltd Jump to: navigation,MazeOhio: Energy Resources Jump to: navigation, search

  12. Magnetic resonance studies of cement based materials in inhomogeneous magnetic fields

    SciTech Connect (OSTI)

    Boguszynska, Joanna [Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, Poznan (Poland); Brown, Marc C.A. [School of Physical Sciences, University of Kent, Canterbury, Kent, CT2 7NR (United Kingdom); McDonald, Peter J. [School of Electronics and Physical Sciences, University of Surrey, Surrey, GU2 7XH (United Kingdom)]. E-mail: p.mcdonald@surrey.ac.uk; Mitchell, Jonathan [School of Electronics and Physical Sciences, University of Surrey, Surrey, GU2 7XH (United Kingdom); Mulheron, Mike [School of Engineering, University of Surrey, Surrey, GU2 7XH (United Kingdom); Tritt-Goc, Jadwiga [Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, Poznan (Poland); Verganelakis, Dimitris A. [Department of Chemical Engineering, University of Cambridge, Cambridge, CB2 3RA (United Kingdom)

    2005-10-01T23:59:59.000Z

    Single-sided magnets give hope that Nuclear Magnetic Resonance (NMR) might in future be used for in situ characterisation of hydration and water transport in the surface layers of concrete slabs. Towards that end, a portable NMR-MOUSE (MObile Universal Surface Explorer) has been used to follow the hydration of gypsum based plaster, a Portland cement paste and concrete mortar. The results compare favourably to those obtained using a standard laboratory bench-top spectrometer. Further, stray field imaging (STRAFI) based methods have been used with embedded NMR detector coils to study water transport across a mortar/topping interface. The measured signal amplitudes are found to correlate with varying sample conditions.

  13. Simulation and analysis on ultrasonic testing for the cement grouting defects of the corrugated pipe

    SciTech Connect (OSTI)

    Qingbang, Han; Ling, Chen; Changping, Zhu [Changzhou Key Laboratory of Sensor Networks and Environmental Sensing, College of IOT, Hohai University Changzhou, Jiangsu, 213022 (China)

    2014-02-18T23:59:59.000Z

    The defects exist in the cement grouting process of prestressed corrugated pipe may directly impair the bridge safety. In this paper, sound fields propagation in concrete structures with corrugated pipes and the influence of various different defects are simulated and analyzed using finite element method. The simulation results demonstrate a much complex propagation characteristic due to multiple reflection, refraction and scattering, where the scattering signals caused by metal are very strong, while the signals scattered by an air bubble are weaker. The influence of defect both in time and frequency domain are found through deconvolution treatment. In the time domain, the deconvolution signals correspond to larger defect display a larger head wave amplitude and shorter arrive time than those of smaller defects; in the frequency domain, larger defect also shows a stronger amplitude, lower center frequency and lower cutoff frequency.

  14. ALARA Design Review for the Resumption of the Plutonium Finishing Plant (PFP) Cementation Process Project Activities

    E-Print Network [OSTI]

    Dayley, L

    2000-01-01T23:59:59.000Z

    The requirements for the performance of radiological design reviews are codified in 10CFR835, Occupational Radiation Protection. The basic requirements for the performance of ALARA design reviews are presented in the Hanford Site Radiological Control Manual (HSRCM). The HSRCM has established trigger levels requiring radiological reviews of non-routine or complex work activities. These requirements are implemented in site procedures HNF-PRO-1622 and 1623. HNF-PRO-1622 Radiological Design Review Process requires that ''radiological design reviews [be performed] of new facilities and equipment and modifications of existing facilities and equipment''. In addition, HNF-PRO-1623 Radiological Work Planning Process requires a formal ALARA Review for planned activities that are estimated to exceed 1 person-rem total Dose Equivalent (DE). The purpose of this review is to validate that the original design for the PFP Cementation Process ensures that the principles of ALARA (As Low As Reasonably Achievable) were included...

  15. Characterization of asphalt cements modified with crumbed rubber from discarded tires. Final report

    SciTech Connect (OSTI)

    Daly, W.H.; Negulescu, I.I.

    1994-11-01T23:59:59.000Z

    The potential legislative requirement for incorporation of scrap rubber into asphalt blends mandated a thorough evaluation of the influence of scrap rubber additives on the physical properties and aging characteristics of rubber/asphalt blends. Blends with up to 20 percent ground vulcanized rubber (both crumb and 200 mesh powder particles) from recycled tires were prepared with asphalt cements of various grades (AC5 - AC30) and evaluated using DMA. Blends produced from powdered rubber particles exhibited Newtonian behavior at high temperatures; similar behavior was not observed with crumb rubber blends. The mechanical properties of asphalt-rubber blends depend upon the concentration of rubber additives, the particle dimensions, and the chemical composition of the asphalt.

  16. Effect of sodium monofluorophosphate treatment on microstructure and frost salt scaling durability of slag cement paste

    SciTech Connect (OSTI)

    Copuroglu, O. [Delft University of Technology, Faculty of CiTG, Micromechanics Laboratory (MICROLAB) (Netherlands)]. E-mail: o.copuroglu@citg.tudelft.nl; Fraaij, A.L.A. [Delft University of Technology, Faculty of CiTG, Materials Science and Sustainable Construction (Netherlands); Bijen, J.M.J.M. [Delft University of Technology, Faculty of CiTG, Materials Science and Sustainable Construction (Netherlands)

    2006-08-15T23:59:59.000Z

    Sodium-monofluorophosphate (Na-MFP) is currently in use as a surface applied corrosion inhibitor in the concrete industry. Its basic mechanism is to protect the passive layer of the reinforcement steel against disruption due to carbonation. Carbonation is known as the most detrimental environmental effect on blast furnace slag cement (BFSC) concrete with respect to frost salt scaling. In this paper the effect of Na-MFP on the microstructure and frost salt scaling resistance of carbonated BFSC paste is presented. The results of electron microscopy, mercury intrusion porosimetry (MIP) and X-ray diffraction (XRD) are discussed. It is found that the treatment modifies the microstructure and improves the resistance of carbonated BFSC paste against frost salt attack.

  17. Power system

    DOE Patents [OSTI]

    Hickam, Christopher Dale (Glasford, IL)

    2008-03-18T23:59:59.000Z

    A power system includes a prime mover, a transmission, and a fluid coupler having a selectively engageable lockup clutch. The fluid coupler may be drivingly connected between the prime mover and the transmission. Additionally, the power system may include a motor/generator drivingly connected to at least one of the prime mover and the transmission. The power-system may also include power-system controls configured to execute a control method. The control method may include selecting one of a plurality of modes of operation of the power system. Additionally, the control method may include controlling the operating state of the lockup clutch dependent upon the mode of operation selected. The control method may also include controlling the operating state of the motor/generator dependent upon the mode of operation selected.

  18. Strathclyde powerS ahead

    E-Print Network [OSTI]

    Mottram, Nigel

    Strathclyde powerS ahead the future of renewable energy SHARING AND ENHANCING RESEARCH Discover the vision of Principal Professor Jim McDonald THE FUTURE OF ENERGY Strathclyde pioneers renewableEdicinE Snapshot the reSearcher Following a decade of environmental research in her native egypt, nabila saleem

  19. 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

    must annually inspect scrubbers, fabric filters, and othercombination of a wet scrubber followed by carbon injectionCement kiln dust internal scrubber SO 2 SO 2 SO 2 Preheater

  20. Investigation of the benefits of carbonate cementation due to addition of low percentage of hydrated lime in the base courses of pavements

    E-Print Network [OSTI]

    Bhuiyan, Jasim Uddin

    1994-01-01T23:59:59.000Z

    Texas, limestone and caliche soil, were tested extensively to examine the effect of carbonate cementation due to the addition of small percentages of lime. Testing included mineralogical analysis of the two materials, strength analysis in terms of texas...

  1. Changing the Mechanical Properties of PMMA Bone Cement with Nano and Micro Particles Ricardo F. Pinto, Brandon J. Johnson, L. D. Timmie Topoleski

    E-Print Network [OSTI]

    Alonso, Juan J.

    in the vacuum mixer. During the exothermic polymerization of the bone cement, the liquid rubber should testing. Specimens were then retrieved and tested individually in three point bending quasi-static loading

  2. Power combiner

    DOE Patents [OSTI]

    Arnold, Mobius; Ives, Robert Lawrence

    2006-09-05T23:59:59.000Z

    A power combiner for the combining of symmetric and asymmetric traveling wave energy comprises a feed waveguide having an input port and a launching port, a reflector for reflecting launched wave energy, and a final waveguide for the collection and transport of launched wave energy. The power combiner has a launching port for symmetrical waves which comprises a cylindrical section coaxial to the feed waveguide, and a launching port for asymmetric waves which comprises a sawtooth rotated about a central axis.

  3. The use of electrical impedance spectroscopy for monitoring the hydration products of Portland cement mortars with high percentage of pozzolans

    SciTech Connect (OSTI)

    Cruz, J.M. [Departamento de Fsica Aplicada, Universitat Politcnica de Valncia, Camino de Vera, 46022, Valencia (Spain)] [Departamento de Fsica Aplicada, Universitat Politcnica de Valncia, Camino de Vera, 46022, Valencia (Spain); Fita, I.C., E-mail: infifer@fis.upv.es [Departamento de Fsica Aplicada, Universitat Politcnica de Valncia, Camino de Vera, 46022, Valencia (Spain); Soriano, L.; Pay, J.; Borrachero, M.V. [ICITECH, Instituto de Ciencia y Tecnologa del Hormign, Universitat Politcnica de Valncia (Spain)] [ICITECH, Instituto de Ciencia y Tecnologa del Hormign, Universitat Politcnica de Valncia (Spain)

    2013-08-15T23:59:59.000Z

    In this paper, mortars and pastes containing large replacement of pozzolan were studied by mechanical strength, thermogravimetric analysis (TGA), scanning electronic microscopy (SEM), mercury intrusion porosimetry (MIP) and electrical impedance spectroscopy (EIS). The effect of metakaolin (35%) and fly ash (60%) was evaluated and compared with an inert mineral addition (andalusite). The portlandite content was measured, finding that the pozzolanic reaction produced cementing systems with all portlandite fixed. The EIS measurements were analyzed by the equivalent electrical circuit (EEC) method. An EEC with three branches in parallel was applied. The dc resistance was related to the degree of hydration and allowed us to characterize plain and blended mortars. A constant phase element (CPE) quantified the electrical properties of the hydration products located in the solidsolution interface and was useful to distinguish the role of inert and pozzolanic admixtures present in the cement matrix.

  4. Cleco Power- Power Miser New Home Program

    Broader source: Energy.gov [DOE]

    Louisiana's Cleco Power offers energy efficiency incentives to eligible customers. Cleco Power offers a rate discount for residential customers building homes that meet the Power Miser Program...

  5. Power Factor Compensation (PFC) Power Factor Compensation

    E-Print Network [OSTI]

    Knobloch,Jürgen

    Power Factor Compensation (PFC) Power Factor Compensation The power factor (PF) is defined as the ratio between the active power and the apparent power of a system. If the current and voltage are periodic with period , and [ ), then the active power is defined by ( ) ( ) (their inner product

  6. Star Power

    ScienceCinema (OSTI)

    None

    2014-11-18T23:59:59.000Z

    The U.S. Department of Energy's Princeton Plasma Physics Laboratory has released ''Star Power,'' a new informational video that uses dramatic and beautiful images and thought-provoking interviews to highlight the importance of the Laboratory's research into magnetic fusion.

  7. Star Power

    SciTech Connect (OSTI)

    None

    2014-10-17T23:59:59.000Z

    The U.S. Department of Energy's Princeton Plasma Physics Laboratory has released ''Star Power,'' a new informational video that uses dramatic and beautiful images and thought-provoking interviews to highlight the importance of the Laboratory's research into magnetic fusion.

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

    SciTech Connect (OSTI)

    Lu, Hongyou; Masanet, Eric; Price, Lynn

    2009-05-29T23:59:59.000Z

    The use of life-cycle assessment (LCA) to understand the embodied energy, environmental impacts, and potential energy-savings of manufactured products has become more widespread among researchers in recent years. This paper reviews recent LCA studies in the cement industry in China and in other countries and provides an assessment of the methodology used by the researchers compared to ISO LCA standards (ISO 14040:2006, ISO 14044:2006, and ISO/TR 14048:2002). We evaluate whether the authors provide information on the intended application, targeted audience, functional unit, system boundary, data sources, data quality assessment, data disaggregation and other elements, and draw conclusions regarding the level of adherence to ISO standards for the papers reviewed. We found that China researchers have gained much experience during last decade, but still have room for improvement in establishing boundaries, assessing data quality, identifying data sources, and explaining limitations. The paper concludes with a discussion of directions for future LCA research in China.

  9. Effect of temperature on the hydration of Portland cement blended with siliceous fly ash

    SciTech Connect (OSTI)

    Deschner, Florian, E-mail: florian.deschner@gmail.com [Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Concrete and Construction Chemistry, berlandstrasse 129, 8600 Dbendorf (Switzerland)] [Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Concrete and Construction Chemistry, berlandstrasse 129, 8600 Dbendorf (Switzerland); Lothenbach, Barbara; Winnefeld, Frank [Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Concrete and Construction Chemistry, berlandstrasse 129, 8600 Dbendorf (Switzerland)] [Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Concrete and Construction Chemistry, berlandstrasse 129, 8600 Dbendorf (Switzerland); Neubauer, Jrgen [GeoZentrum Nordbayern, Mineralogy, University of Erlangen-Nuremberg, 91054 Erlangen (Germany)] [GeoZentrum Nordbayern, Mineralogy, University of Erlangen-Nuremberg, 91054 Erlangen (Germany)

    2013-10-15T23:59:59.000Z

    The effect of temperature on the hydration of Portland cement pastes blended with 50 wt.% of siliceous fly ash is investigated within a temperature range of 7 to 80 C. The elevation of temperature accelerates both the hydration of OPC and fly ash. Due to the enhanced pozzolanic reaction of the fly ash, the change of the composition of the CSH and the pore solution towards lower Ca and higher Al and Si concentrations is shifted towards earlier hydration times. Above 50 C, the reaction of fly ash also contributes to the formation of siliceous hydrogarnet. At 80 C, ettringite and AFm are destabilised and the released sulphate is partially incorporated into the CSH. The observed changes of the phase assemblage in dependence of the temperature are confirmed by thermodynamic modelling. The increasingly heterogeneous microstructure at elevated temperatures shows an increased density of the CSH and a higher coarse porosity. -- Highlights: The reaction of quartz powder at 80 C strongly enhances the compressive strength. Almost no strength increase of fly ash blended OPC at 80 C was found after 2 days. Siliceous hydrogarnet is formed upon the reaction of fly ash at high temperatures. Temperature dependent change of the system was simulated by thermodynamic modelling. Destabilisation of ettringite above 50 C correlates with sulphate content of CSH.

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

    E-Print Network [OSTI]

    Bormann, Jeffrey Ray

    1985-01-01T23:59:59.000Z

    ENGINEERING PROPERTIES OF MINIATURE CEMENT - FLY ASH COMPACTS PREPARED BY HIGH PRESSURE COMPACTION E NGIRPR OT SFMMAFU AEU C-ALEYY HDOBPvvIi va vGI ge(iD(vI oannItI au NId(R E)L xrP1IeRPvT 9(evP(n uDnuPnnBIrv au vGI eI0DPeIBIrvR uae vGI i...?H?? NId(R E)L xrP1IeRPvT oG(PeB(r au Ei1PRaeT oaBBPvvII? ?e? ??C? ?IiOIvvIe oDeeIrv 9e(8vP8IR (ri vGIaeT 8aruaeB va vGI 8ar8I9v vG(v uae R9I8P(nP?Ii DRIR ( 9aevn(ri 8IBIrv 8ar8eIvI B(vIeP(n ?PvG RveIrtvG (99ea(8GPrt ?????? 9RP B(T OI 9eaiD8Ii OT eIiD8...

  11. Effect of Decreasing of Cobalt Content in Properties for Diamond/Cemented Carbide Tools

    SciTech Connect (OSTI)

    Waratta, A.; Hamdi, M. [Department of Design and Manufacture, Faculty of Engineering, University of Malaya (Malaysia); Ariga, T. [Department of Materials Science, School of Engineering, Tokai University (Japan)

    2010-03-11T23:59:59.000Z

    Powder metallurgy plays a role in manufacturing such as automotive and cutting tool applications. Diamond/cemented carbide tools are also made from this technique. Diamond particle and other matrix materials were employed in this study. The purpose is to investigate the physical and mechanical properties of different Cobalt (Co) content samples by using Taguchi's method. The materials used in the experiments were mixed by using a ball-mill machine. The mixed powders were pressed by conventional method. Then the green samples were sintered in a vacuum furnace. After reaching 500 deg. C, the samples were sintered with Argon (Ar) gas. The sintered samples were investigated density by immersion method, porosity by water saturation method, and hardness by Vicker hardness tester. It was found that with 59.5% Co content, plain diamond type, sintering temperature of 950 deg. C, sintering time of 40 minutes, and pressure of 625 MPa, density, porosity, and hardness got the best result in this study. From the Taguchi's analysis, the significant factors effected the performance were composition, sintering temperature, and sintering time.

  12. THE IMPACT OF DISSOLVED SALTS ON PASTES CONTAINING FLY ASH, CEMENT AND SLAG

    SciTech Connect (OSTI)

    Harbour, J.; Edwards, T.; Williams, V.

    2009-09-21T23:59:59.000Z

    The degree of hydration of a mixture of cementitious materials (Class F fly ash, blast furnace slag and portland cement) in highly concentrated alkaline salt solutions is enhanced by the addition of aluminate to the salt solution. This increase in the degree of hydration, as monitored with isothermal calorimetry, leads to higher values of dynamic Young's modulus and compressive strength and lower values of total porosity. This enhancement in performance properties of these cementitious waste forms by increased hydration is beneficial to the retention of the radionuclides that are also present in the salt solution. The aluminate ions in the solution act first to retard the set time of the mix but then enhance the hydration reactions following the induction period. In fact, the aluminate ions increase the degree of hydration by {approx}35% over the degree of hydration for the same mix with a lower aluminate concentration. An increase in the blast furnace slag concentration and a decrease in the water to cementitious materials ratio produced mixes with higher values of Young's modulus and lower values of total porosity. Therefore, these operational factors can be fine tuned to enhance performance properties of cementitious waste form. Empirical models for Young modulus, heat of hydration and total porosity were developed to predict the values of these properties. These linear models used only statistically significant compositional and operational factors and provided insight into those factors that control these properties.

  13. Commerical-Scale CO2 Capture and Sequestration for the Cement Industry

    SciTech Connect (OSTI)

    Adolfo Garza

    2010-07-28T23:59:59.000Z

    On June 8, 2009, DOE issued Funding Opportunity Announcement (FOA) Number DE-FOA-000015 seeking proposals to capture and sequester carbon dioxide from industrial sources. This FOA called for what was essentially a two-tier selection process. A number of projects would receive awards to conduct front-end engineering and design (FEED) studies as Phase I. Those project sponsors selected would be required to apply for Phase II, which would be the full design, construction, and operation of their proposed technology. Over forty proposals were received, and ten were awarded Phase I Cooperative Agreements. One of those proposers was CEMEX. CEMEX proposed to capture and sequester carbon dioxide (CO2) from one of their existing cement plants and either sequester the CO2 in a geologic formation or use it for enhanced oil recovery. The project consisted of evaluating their plants to identify the plant best suited for the demonstration, identify the best available capture technology, and prepare a design basis. The project also included evaluation of the storage or sequestration options in the vicinity of the selected plant.

  14. 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.

  15. 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.

  16. Power superconducting power transmission cable

    DOE Patents [OSTI]

    Ashworth, Stephen P. (Cambridge, GB)

    2003-01-01T23:59:59.000Z

    The present invention is for a compact superconducting power transmission cable operating at distribution level voltages. The superconducting cable is a conductor with a number of tapes assembled into a subconductor. These conductors are then mounted co-planarly in an elongated dielectric to produce a 3-phase cable. The arrangement increases the magnetic field parallel to the tapes thereby reducing ac losses.

  17. Power Right. Power Smart. Efficient Computer Power Supplies and...

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

    AC power that you get from your electric company into the DC power consumed by most electronics, including your computer. We expect our power supplies to be safe, reliable, and...

  18. Silicon Valley Power and Oklahoma Municipal Power Authority Win...

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

    Silicon Valley Power and Oklahoma Municipal Power Authority Win 2014 Public Power Wind Awards Silicon Valley Power and Oklahoma Municipal Power Authority Win 2014 Public Power Wind...

  19. Tidal power

    SciTech Connect (OSTI)

    Hammons, T.J. (Glasgow Univ., Scotland (United Kingdom))

    1993-03-01T23:59:59.000Z

    The paper reviews the physics of tidal power considering gravitational effects of moon and sun; semidiurnal, diurnal, and mixed tides; and major periodic components that affect the tidal range. Shelving, funneling, reflection, and resonance phenomena that have a significant effect on tidal range are also discussed. The paper then examines tidal energy resource for principal developments estimated from parametric modeling in Europe and worldwide. Basic parameters that govern the design of tidal power schemes in terms of mean tidal range and surface area of the enclosed basin are identified. While energy extracted is proportional to the tidal amplitude squared, requisite sluicing are is proportional to the square root of the tidal amplitude. Sites with large tidal amplitudes are therefore best suited for tidal power developments, whereas sites with low tidal amplitudes have sluicing that may be prohibitive. It is shown that 48% of the European tidal resource is in the United Kingdom, 42% in France and 8% in Ireland, other countries having negligible potential. Worldwide tidal resource is identified. Tidal barrage design and construction using caissons is examined, as are alternative operating modes (single-action generation, outflow generation, flood generation, two-way generation, twin basin generation, pumping, etc), development trends and possibilities, generation cost at the barrage boundary, sensitivity to discount rates, general economics, and markets. Environmental effects, and institutional constraints to the development of tidal barrage schemes are also discussed.

  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

    Analysis and Evaluation of Waste Heat Power Generation onpreheater NSP with waste heat generation and alternativeclear Not clear NSP with waste heat generation Not clear Not

  1. Wind power and Wind power and

    E-Print Network [OSTI]

    Wind power and the CDM #12; Wind power and the CDM Emerging practices in developing wind power 2005 Jyoti P. Painuly, Niels-Erik Clausen, Jrgen Fenhann, Sami Kamel and Romeo Pacudan #12; WIND POWER AND THE CDM Emerging practices in developing wind power projects for the Clean Development Mechanism Energy

  2. Energy Efficient Microwave Hybrid Processing of Lime for Cement, Steel, and Glass Industries

    SciTech Connect (OSTI)

    Fall, Morgana L; Yakovlev, Vadim; Sahi, Catherine; Baranova, Inessa; Bowers, Johnney G; Esquenazi\t, Gibran L

    2012-02-10T23:59:59.000Z

    In this study, the microwave materials interactions were studied through dielectric property measurements, process modeling, and lab scale microwave hybrid calcination tests. Characterization and analysis were performed to evaluate material reactions and energy usage. Processing parameters for laboratory scale and larger scale calcining experiments were developed for MAT limestone calcination. Early stage equipment design concepts were developed, with a focus on microwave post heating treatment. The retrofitting of existing rotary calcine equipment in the lime industry was assessed and found to be feasible. Ceralink sought to address some of the major barriers to the uptake of MAT identified as the need for (1) team approach with end users, technology partners, and equipment manufacturers, (2) modeling that incorporates kiln materials and variations to the design of industrial microwave equipment. This project has furthered the commercialization effort of MAT by working closely with an industrial lime manufacturer to educate them regarding MAT, identifying equipment manufacturer to supply microwave equipment, and developing a sophisticated MAT modeling with WPI, the university partner. MAT was shown to enhance calcining through lower energy consumption and faster reaction rates compared to conventional processing. Laboratory testing concluded that a 23% reduction in energy was possible for calcining small batches (5kg). Scale-up testing indicated that the energy savings increased as a function of load size and 36% energy savings was demonstrated (22 kg). A sophisticated model was developed which combines simultaneous microwave and conventional heating. Continued development of this modeling software could be used for larger scale calcining simulations, which would be a beneficial low-cost tool for exploring equipment design prior to actual building. Based on these findings, estimates for production scale MAT calcining benefits were calculated, assuming uptake of MAT in the US lime industry. This estimate showed that 7.3 TBTU/year could be saved, with reduction of 270 MMlbs of CO2 emissions, and $29 MM/year in economic savings. Taking into account estimates for MAT implementation in the US cement industry, an additional 39 TBTU/year, 3 Blbs of CO2 and $155 MM/year could be saved. One of the main remaining barriers to commercialization of MAT for the lime and cement industries is the sheer size of production. Through this project, it was realized that a production size MAT rotary calciner was not feasible, and a different approach was adapted. The concept of a microwave post heat section located in the upper portion of the cooler was devised and appears to be a more realistic approach for MAT implementation. Commercialization of this technology will require (1) continued pilot scale calcining demonstrations, (2) involvement of lime kiln companies, and (3) involvement of an industrial microwave equipment provider. An initial design concept for a MAT post-heat treatment section was conceived as a retrofit into the cooler sections of existing lime rotary calciners with a 1.4 year payback. Retrofitting will help spur implementation of this technology, as the capital investment will be minimal for enhancing the efficiency of current rotary lime kilns. Retrofits would likely be attractive to lime manufacturers, as the purchase of a new lime kiln is on the order of a $30 million dollar investment, where as a MAT retrofit is estimated on the order of $1 million. The path for commercialization lies in partnering with existing lime kiln companies, who will be able to implement the microwave post heat sections in existing and new build kilns. A microwave equipment provider has been identified, who would make up part of the continued development and commercialization team.

  3. MOBILIZATION AND CHARACTERIZATION OF COLLOIDS GENERATED FROM CEMENT LEACHATES MOVING THROUGH A SRS SANDY SEDIMENT

    SciTech Connect (OSTI)

    Li, D.; Roberts, K.; Kaplan, D.; Seaman, J.

    2011-09-20T23:59:59.000Z

    Naturally occurring mobile colloids are ubiquitous and are involved in many important processes in the subsurface zone. For example, colloid generation and subsequent mobilization represent a possible mechanism for the transport of contaminants including radionuclides in the subsurface environments. For colloid-facilitated transport to be significant, three criteria must be met: (1) colloids must be generated; (2) contaminants must associate with the colloids preferentially to the immobile solid phase (aquifer); and (3) colloids must be transported through the groundwater or in subsurface environments - once these colloids start moving they become 'mobile colloids'. Although some experimental investigations of particle release in natural porous media have been conducted, the detailed mechanisms of release and re-deposition of colloidal particles within natural porous media are poorly understood. Even though this vector of transport is known, the extent of its importance is not known yet. Colloid-facilitated transport of trace radionuclides has been observed in the field, thus demonstrating a possible radiological risk associated with the colloids. The objective of this study was to determine if cementitious leachate would promote the in situ mobilization of natural colloidal particles from a SRS sandy sediment. The intent was to determine whether cementitious surface or subsurface structure would create plumes that could produce conditions conducive to sediment dispersion and mobile colloid generation. Column studies were conducted and the cation chemistries of influents and effluents were analyzed by ICP-OES, while the mobilized colloids were characterized using XRD, SEM, EDX, PSD and Zeta potential. The mobilization mechanisms of colloids in a SRS sandy sediment by cement leachates were studied.

  4. Recycling of the product of thermal inertization of cement-asbestos for various industrial applications

    SciTech Connect (OSTI)

    Gualtieri, Alessandro F., E-mail: alessandro.gualtieri@unimore.it [Dipartimento di Scienze della Terra, Universita di Modena e R.E., Via S. Eufemia 19, I-41100 Modena (Italy); Giacobbe, Carlotta; Sardisco, Lorenza; Saraceno, Michele [Dipartimento di Scienze della Terra, Universita di Modena e R.E., Via S. Eufemia 19, I-41100 Modena (Italy); Lassinantti Gualtieri, Magdalena [Dipartimento Ingegneria dei Materiali e dell'Ambiente, Universita di Modena e Reggio Emilia, Via Vignolese 905/a, I-41100 Modena (Italy); Lusvardi, Gigliola [Dipartimento di Chimica, Universita degli Studi di Modena e Reggio Emilia, Via G. Campi 183, I-41100 Modena (Italy); Cavenati, Cinzia; Zanatto, Ivano [ZETADI S.r.l., Via dell'Artigianato 10, Ferno (Italy)

    2011-01-15T23:59:59.000Z

    Recycling of secondary raw materials is a priority of waste handling in the countries of the European community. A potentially important secondary raw material is the product of the thermal transformation of cement-asbestos, produced by prolonged annealing at 1200-1300 {sup o}C. The product is chemically comparable to a Mg-rich clinker. Previous work has assured the reliability of the transformation process. The current challenge is to find potential applications as secondary raw material. Recycling of thermally treated asbestos-containing material (named KRY.AS) in traditional ceramics has already been studied with successful results. The results presented here are the outcome of a long termed project started in 2005 and devoted to the recycling of this secondary raw materials in various industrial applications. KRY.AS can be added in medium-high percentages (10-40 wt%) to commercial mixtures for the production of clay bricks, rock-wool glasses for insulation as well as Ca-based frits and glass-ceramics for the production of ceramic tiles. The secondary raw material was also used for the synthesis of two ceramic pigments; a green uvarovite-based pigment [Ca{sub 3}Cr{sub 2}(SiO{sub 4}){sub 3}] and a pink malayaite-based pigment [Ca(Sn,Cr)SiO{sub 5}]. The latter is especially interesting as a substitute for cadmium-based pigments. This work also shows that KRY.AS can replace standard fillers in polypropylene plastics without altering the properties of the final product. For each application, a description and relevant results are presented and discussed.

  5. Power Recovery

    E-Print Network [OSTI]

    Murray, F.

    , will be the use of the ASTM Theoretical Steam Rate Tables. In addition, the author's experience regarding the minimum size for power recovery units that are economic in a Culf Coast plant will be presented. INTROD\\Jr.'rION When surveying an operation... will be discussed in detail. Each term in the equation will be considered in English units. Secondly, the use of Mollier diagrams to estimate the enthalphy change between the initial and final conditions will be considered. The last method, specific to steam...

  6. Yakama Power

    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:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron SpinPrincetonUsingWhatY-12 recognized for ...BER/NERSCYakama Power May

  7. Fusion Power

    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 AdministrationField8,Dist.Newof EnergyFunding Opportunity fromFusion Links Fusion

  8. Power management system

    DOE Patents [OSTI]

    Algrain, Marcelo C. (Peoria, IL); Johnson, Kris W. (Washington, IL); Akasam, Sivaprasad (Peoria, IL); Hoff, Brian D. (East Peoria, IL)

    2007-10-02T23:59:59.000Z

    A method of managing power resources for an electrical system of a vehicle may include identifying enabled power sources from among a plurality of power sources in electrical communication with the electrical system and calculating a threshold power value for the enabled power sources. A total power load placed on the electrical system by one or more power consumers may be measured. If the total power load exceeds the threshold power value, then a determination may be made as to whether one or more additional power sources is available from among the plurality of power sources. At least one of the one or more additional power sources may be enabled, if available.

  9. Solar powered desalination system

    E-Print Network [OSTI]

    Mateo, Tiffany Alisa

    2011-01-01T23:59:59.000Z

    2008, uses concentrated solar power to split water. Figurethe main reason the potential for solar power is boundless.a clean energy source, solar power is inexhaustible, fairly

  10. ELECTROCHEMICAL POWER FOR TRANSPORTATION

    E-Print Network [OSTI]

    Cairns, Elton J.

    2012-01-01T23:59:59.000Z

    electric power generating plant, and the distributionrequired on the power-generating plant and not on the vehi-in either power-generating plants or combustion engines,

  11. Southwestern Power Administration

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

    Courses Instructors NERC Continuing Education Power Operations Training Center You'll find the "Power" of learning at Southwestern's Power Operations Training Center (POTC). POTC's...

  12. POWER PURCHASE AGREEMENT DELMARVA POWER & LIGHT COMPANY

    E-Print Network [OSTI]

    Firestone, Jeremy

    POWER PURCHASE AGREEMENT between DELMARVA POWER & LIGHT COMPANY ("Buyer") and BLUEWATER WIND 3.5 Energy Forecasts, Scheduling and Balancing.......................................... 39 3

  13. Power oscillator

    DOE Patents [OSTI]

    Gitsevich, Aleksandr (Montgomery Village, MD)

    2001-01-01T23:59:59.000Z

    An oscillator includes an amplifier having an input and an output, and an impedance transformation network connected between the input of the amplifier and the output of the amplifier, wherein the impedance transformation network is configured to provide suitable positive feedback from the output of the amplifier to the input of the amplifier to initiate and sustain an oscillating condition, and wherein the impedance transformation network is configured to protect the input of the amplifier from a destructive feedback signal. One example of the oscillator is a single active element device capable of providing over 70 watts of power at over 70% efficiency. Various control circuits may be employed to match the driving frequency of the oscillator to a plurality of tuning states of the lamp.

  14. Evaluation of sulfidic mine tailings solidified/stabilized with cement kiln dust and fly ash to control acid mine drainage

    SciTech Connect (OSTI)

    Nehdi, M.; Tariq, A. [University of Western Ontario, London, ON (Canada). Dept. of Civil & Environmental Engineering

    2008-11-15T23:59:59.000Z

    In the present research, industrial byproducts, namely, cement kiln dust (CKD) and Class C fly ash (FAC) have been used as candidate materials along with the partial addition of sulfate-resistant cement (SRC) in the Stabilization/solidification of polymetallic sulfidic mine tailings (MT). The effectiveness of S/S was assessed by comparing laboratory experimental values obtained from unconfined compressive strength, hydraulic conductivity and leaching propensity tests of S/S samples with regulatory standards for safe surface disposal of such wastes. Despite general regulatory compliance of compressive strength and hydraulic conductivity, some solidified/stabilized-cured matrices were found unable to provide the required immobilization of pollutants. Solidified/stabilized and 90-day cured mine tailings specimens made with composite binders containing (10% CKD + 10% FAC), (5% SRC + 15% FAC) and (5% SRC + 5% CKD + 10% FAC) significantly impaired the solubility of all contaminants investigated and proved successful in fixing metals within the matrix, in addition to achieving adequate unconfined compressive strength and hydraulic conductivity values, thus satisfying USEPA regulations. Laboratory investigations revealed that, for polymetallic mining waste, leachate concentrations are the most critical factor in assessing the effectiveness of S/S technology.

  15. Multi-criteria analysis of the mechanism of degradation of Portland cement based mortars exposed to external sulphate attack

    SciTech Connect (OSTI)

    El-Hachem, R.; Roziere, E.; Grondin, F.; Loukili, A., E-mail: ahmed.loukili@ec-nantes.fr

    2012-10-15T23:59:59.000Z

    This work aims to contribute to the design of durable concrete structures exposed to external sulphate attacks (ESA). Following a preliminary study aimed at designing a representative test, the present paper suggests a study on the effect of the water-to-cement (w/c) ratio and the cement composition in order to understand the degradation mechanisms. Length and mass measurements were registered continuously, leached calcium and hydroxide ions were also quantified. In parallel, scanning electron microscopy observations as well as X-ray microtomography were realised at different times to identify the formed products and the crack morphology. Test results provide information on the basic aspects of the degradation mechanism, such as the main role of leaching and diffusion in the sulphate attack process. The mortar composition with a low w/c ratio leads to a better resistance to sulphate attack because the microstructure is less permeable. Reducing the C{sub 3}A content results in a macro-cracking decrease but it does not prevent expansion, which suggests the contribution of other expansive products, such as gypsum, in damage due to ESA. The observation of the cracks network in the microstructure helps to understand the micro-mechanisms of the degradation process.

  16. Life-cycle analysis results for geothermal systems in comparison to other power systems: Part II.

    SciTech Connect (OSTI)

    Sullivan, J.L.; Clark, C.E.; Yuan, L.; Han, J.; Wang, M. (Energy Systems)

    2012-02-08T23:59:59.000Z

    A study has been conducted on the material demand and life-cycle energy and emissions performance of power-generating technologies in addition to those reported in Part I of this series. The additional technologies included concentrated solar power, integrated gasification combined cycle, and a fossil/renewable (termed hybrid) geothermal technology, more specifically, co-produced gas and electric power plants from geo-pressured gas and electric (GPGE) sites. For the latter, two cases were considered: gas and electricity export and electricity-only export. Also modeled were cement, steel and diesel fuel requirements for drilling geothermal wells as a function of well depth. The impact of the construction activities in the building of plants was also estimated. The results of this study are consistent with previously reported trends found in Part I of this series. Among all the technologies considered, fossil combustion-based power plants have the lowest material demand for their construction and composition. On the other hand, conventional fossil-based power technologies have the highest greenhouse gas (GHG) emissions, followed by the hybrid and then two of the renewable power systems, namely hydrothermal flash power and biomass-based combustion power. GHG emissions from U.S. geothermal flash plants were also discussed, estimates provided, and data needs identified. Of the GPGE scenarios modeled, the all-electric scenario had the highest GHG emissions. Similar trends were found for other combustion emissions.

  17. Synthetic Aragonite (CaCO3) as a Potential Additive in Calcium Phosphate Cements: Evaluation in Tris-free SBF at 37C

    E-Print Network [OSTI]

    Tas, A. Cuneyt

    Synthetic Aragonite (CaCO3) as a Potential Additive in Calcium Phosphate Cements: Evaluation) may be regarded as naturally occurring hydrous poly- morphs of CaCO3 and both are stable is the most stable and abundant polymorph of calcium carbonate, while vaterite (l- CaCO3), named after

  18. Primer on Durability of Nuclear Power Plant Reinforced Concrete Structures - A Review of Pertinent Factors

    SciTech Connect (OSTI)

    Naus, Dan J [ORNL

    2007-02-01T23:59:59.000Z

    The objective of this study was to provide a primer on the environmental effects that can affect the durability of nuclear power plant concrete structures. As concrete ages, changes in its properties will occur as a result of continuing microstructural changes (i.e., slow hydration, crystallization of amorphous constituents, and reactions between cement paste and aggregates), as well as environmental influences. These changes do not have to be detrimental to the point that concrete will not be able to meet its performance requirements. Concrete, however, can suffer undesirable changes with time because of improper specifications, a violation of specifications, or adverse performance of its cement paste matrix or aggregate constituents under either physical or chemical attack. Contained in this report is a discussion on concrete durability and the relationship between durability and performance, a review of the historical perspective related to concrete and longevity, a description of the basic materials that comprise reinforced concrete, and information on the environmental factors that can affect the performance of nuclear power plant concrete structures. Commentary is provided on the importance of an aging management program.

  19. Included are Popular Write-ups (in order) of: STEP Cement

    E-Print Network [OSTI]

    Schmitt, William R.

    atmospheric carbon dioxide to preindustrial levels in a decade, harnessing the sun's power to make useful products at the same time. by Elizabeth Svoboda published online August 1, 2011 Stuart Licht's STEP (Solar Thermal Electrochemical Production) process uses solar energy to break down atmospheric CO2 and other

  20. An investigation of the creep phenomena exhibited by Solenhofen limestone, halite, and cement under medium confining pressures

    E-Print Network [OSTI]

    Kendall, Halcombe Augustus

    1958-01-01T23:59:59.000Z

    SHORT-T II" 1' - T IN F I GURE 5. CONF INED SHORT-T IME T'- ' T IN vROGR. 8 26 F IGURE 6 F IGURE 7 CREEP TESTS IN PROG+' b~, SH' ~tNG AUXILIARY LOADING DEViCi FA I LURE OF SOLENHOF t N L I I'tc STONc SPECIMENS 2'7 JO FIGURE 8. FAILURE OF CEMENT... IN 19/7 ON ROCK SALT& AND BY 12 LAYS LIBRARY A BIB COLLEGE OF TEXAS IN 19/6~ GR I GGS DEFORMED L I MESTONE UNDER CONF I N ING 1 PRESSURES UP TO 13 F000 ATMOSPHERES ~ HE SHOWED THAT WHEN THE SPECIMENS WERE JACKETED' SO THAT THE KEROSENE (USED...