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You searched on: Author: dale bentz

Displaying records 151 to 160 of 209 records.
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151. Effects of the Incorporation of Municipal Solid Waste Incineration Fly Ash in Cement Pastes and Mortars. II: Modeling
Published: 4/1/2002
Authors: S Remond, Dale P Bentz, M. Pimpinella
Abstract: This work falls within the scope of a general problem of the assessment of concretes manufactured from waste materials. The main objective is to study the long-term evolution of these materials during leaching using the cellular automata- based hydra ...

152. Stoichiometry of Slag Hydration With Calcium Hydroxide
Published: 4/1/2002
Authors: J M Richardson, Joseph J Biernacki, Paul E Stutzman, Dale P Bentz
Abstract: The stoichiometry of the reaction between ground granulated blast furnace slag (GGBFS) having an empirical formula of C^d7.^d88^ S^d7.39^ and calcium hydroxide (CH) was investigated. Scanning electron microscopy (SEM) was used to determine the slag ...

153. Service Life Prediction Based on Sorptivity for Highway Concrete Exposed to Sulfate Attack and Freeze-Thaw Conditions
Published: 3/1/2002
Authors: Dale P Bentz, M A Ehlen, Chiara F Ferraris, John A. Winpigler
Abstract: This user's guide describes the set of screens and an example analysis for CONCLIFE, user-friendly software for estimating the service life of concrete pavements and bridge decks exposed to sulfate attack and freeze-thaw deterioration. CONCLIFE uses ...

154. The Visible Cement Data Set
Series: Journal of Research (NIST JRES)
Published: 3/1/2002
Authors: Dale P Bentz, S Mizell, Steven G Satterfield, J E Devaney, William L George, Peter M. Ketcham, James R Graham, J E Porterfield, Daniel A Quenard, F A Vallee, H Sallee, E Boller, J Baruchel
Abstract: With advances in X-ray microtomography, it is now possible to obtain three-dimensional representations of a material's microstructure with a voxel size of less then one micrometer. The Visible Cement Data Set represents a collection of 3-D data set ...

155. On the Mitigation of Early Age Cracking
Published: 1/1/2002
Authors: Dale P Bentz, M R Geiker, O M Jensen
Abstract: Potential means of limiting early age cracking ofconcrete structures have been investigated. Threedifferent methods of mitigating autogenous strainsand stresses in cement mortars (w/s=0.35, 8 % silica fume) are compared: 1.) reduction of thesurface ...

156. The Virtual Cement and Concrete Testing Laboratory Consortium Annual Report 2001
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6840
Published: 12/1/2001
Author: Dale P Bentz
Abstract: The Virtual Cement and Concrete Testing Laboratory(VCCTL) consortium was formed in January of 2001. Headquartered in the Building and Fire ResearchLaboratory at the National Institute of Standardsand Technology (NIST), the consortium currentlyconsis ...

157. Drying/Hydration in Cement Pastes During Curing
Published: 11/1/2001
Authors: Dale P Bentz, K K Hansen, H D Madsen, F A Vallee, E J Griesel
Abstract: As concrete cures in the field, there is a constant competition for the mixing water between evaporation and hydration processes. Understanding the mechanisms of water movement in the drying/hydrating cement paste is critical for designing curing sy ...

158. Multi-Scale Microstructural Modeling to Predict Chloride Ion Diffusivity for High Performance Concrete
Published: 11/1/2001
Authors: Dale P Bentz, Edward Joseph Garboczi
Abstract: As durability issues become increasingly prominent in concrete design, the need to predict the transport properties of a given concrete mixture becomes critical. For many degradation scenarios (corrosion, sulfate attack, etc.), the diffusion coeffic ...

159. The Effect of Statistical Fluctuation, Finite Size Error, and Digital Resolution on the Phase Percolation and Transport Properties of the NIST Cement Hydration Model
Published: 10/1/2001
Authors: Edward Joseph Garboczi, Dale P Bentz
Abstract: The National Institute of Standards and Technology (NIST) cement hydration model starts with a three-dimensional digital image of cement particles, and then uses cellular automaton rules to simulate the reaction of cement with water and the developm ...

160. Sorptivity-Based Service Life Predictions for Concrete Pavements
Published: 9/1/2001
Authors: Dale P Bentz, M A Ehlen, Chiara F Ferraris, Edward Joseph Garboczi
Abstract: The degradation of concrete pavements is often controlled by the transport of a deleterious species (chloride or sulfate ions, or water in the case of freeze/thaw) into the concrete. With this in mind, a three-year research project, funded by the Fe ...

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