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Author: dale bentz

Displaying records 151 to 160 of 171 records.
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151. Effect of the Interfacial Transition Zone on the Conductivity of Portland Cement Mortars
Published: 5/1/2000
Authors: J D Shane, T Mason, D A Jennings, Edward Joseph Garboczi, Dale P Bentz
Abstract: The electrical conductivity of portland cement mortars was determined experimentally as a function of the volume fraction of sand and degree of hydration. The results were analyzed using theoretical models that represent the mortars as three-phase, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860199

152. Fibers, Percolation, and Spalling of High-Performance Concrete
Published: 5/1/2000
Author: Dale P Bentz
Abstract: While the strength and durability of high performance concretes (HPCs) are often greatly superior to conventional concretes under ambient conditions, their failure is sometimes rapid and dramatic during exposure to a fire, characterized by the explos ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860181

153. CEMHYD3D: A Three-Dimensional Cement Hydration and Microstructure Development Modelling Package. Version 2.0
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6485
Published: 4/1/2000
Author: Dale P Bentz
Abstract: This user's manual provides updated documentation and computer program listings for version 2.0 of the three-dimensional cement hydration and microstructure development model (CEMHYD3D) developed at the National Institute of Standards and Technology. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860253

154. The Past, Present, and Future of the Computational Materials Science of Concrete
Published: 4/1/2000
Authors: Edward Joseph Garboczi, Dale P Bentz, G J. Frohnsdorff
Abstract: The computational materials science of concrete has developed rapidly in the last 15 years. This development has been strongly tied to the even more rapid advances in computer processor speed and memory during this same time, without which progress i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860275

155. Protected Paste Volume in Concrete: Extension to Internal Curing Using Saturated Lightweight Fine Aggregate
Published: 11/1/1999
Authors: Dale P Bentz, Kenneth Alan Snyder
Abstract: One difficulty in the field use of high performance concrete is the extensive self-desiccation and autogeneous shrinkage that may occur due to its lower w/c ratio and the addition of silica fume to the mixture proportions. Several researchers have p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860184

156. Effects of Cement Particle Size Disbribution on Performance Properties of Portland Cement-Based Materials
Published: 10/1/1999
Authors: Dale P Bentz, Edward Joseph Garboczi, C Haecker, O M Jensen
Abstract: The original size, spatial distribution, and composition of Portland cement particles have a large influence on hydration kinetics, microstructure development, and ultimate properties of cement-based materials. In this paper, the effects of cement ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860176

157. Studies of Hydration and Drying in Cement Pastes by Scanning X-Ray Absorptiometry
Published: 10/1/1999
Authors: K K Hansen, Dale P Bentz
Abstract: Hydration and drying in cement pastes are studied by the x-ray environmental chamber at DTU. By using the x-ray detector to detect changes in internal density (indicative of drying), the influence of w/c ratio on drying during hydration is quantitat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860217

158. Transport Properties and Durability of Concrete: Literature Review and Research Plan
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6395
Published: 9/1/1999
Authors: Dale P Bentz, J R Clifton, Chiara F Ferraris, Edward Joseph Garboczi, J M Torrents
Abstract: The increased emphasis on life cycle cost analysis for building projects requires that new attention be focused on the service life and durability of concrete structures. While concrete is typically specified based on compressive strength and slump, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860229

159. Effects of Cement PSD on Porosity Percolation and Self-Desiccation
Published: 8/1/1999
Author: Dale P Bentz
Abstract: The degree of self-desiccation in field concrete depends on the availability of external water to replace that consumed due to the chemical shrinkage that occurs during cement hydration. As the cement hydrates, the capillary porosity depercolates, d ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860171

160. SEM/X-Ray Imaging of Cement-Based Materials
Published: 8/1/1999
Authors: Dale P Bentz, Paul E Stutzman, C Haecker, S Remond
Abstract: Scanning electron microscopy and X-ray imaging techniques have been developed for imaging the complex microstructure of cement-based materials such as cement powder and fly ash. By combining the information available in the backscattered electron an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861061



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