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Search Publications by: Kenneth A. Snyder (Fed)

Displaying 76 - 100 of 148

A C-S-H Atomic-Scale Computational Toolkit: Application to Service Life Modeling

September 1, 2006

Author(s)

Kenneth A. Snyder, Raymond D. Mountain, Antonio Faraone

A computational toolkit is being developed for studying materials relevant to portland cement hydration. The toolkit will eventually include both a materials database and a collection of computational tools for constructing atomic-scale models, of both

Engineered Infills for Concrete Barriers

April 3, 2006

Author(s)

Kenneth A. Snyder, C Langton, B Clark, Chiara C. Ferraris, J Dawson

Entombment may be considered as an option for decommissioning nuclear concrete structures so that licenses for facilities on which these structures reside may be terminated. Prior to entombment, the nuclear facility permanently ceases operations and spent

Modeling Ion and Fluid Transport in Unsaturated Cement Systems in Isothermal Conditions.

December 1, 2005

Author(s)

E Samson, J Marchand, Kenneth A. Snyder, J J. Beaudoin

Reply to the Discussion by C. Shi of the Paper Estimating the Electrical Conductivity of Cement Paste Pore Solution From OH-, K+, and Na+ Concentrations".

December 1, 2005

Author(s)

Kenneth A. Snyder

Effect of Continued Hydration on the Transport Properties of Cracks Through Portland Cement Pastes in a Saturated Environment: A Microstructural Model Study

August 1, 2005

Author(s)

Kenneth A. Snyder, Jeffrey W. Bullard

Reply to Discussion of, Estimating the Electrical Conductivity of Cement Paste Pore Solution From OH, K, and Na Concentrations, C&CR MS # 5897 (r)

February 1, 2005

Author(s)

Kenneth A. Snyder

Reply to the discussion by C. Shi of the paper Estimating the Electrical Conductivity of Cement Paste Pore Solution from OH-, K+, and Na+ Concentrations

February 1, 2005

Author(s)

Kenneth A. Snyder

Shi et al. have applied an equation for solution equivalent conductivities (denoted by A) to the problem of estimating species equivalent conductivities (denoted by A.), with potentially pathological consequences, as I will show. For completeness, I will

Modeling Ion and Fluid Transport in Unsaturated Cement Systems for Isothermal Conditions

January 1, 2005

Author(s)

E Samson, J Marchand, Kenneth A. Snyder, J J. Beaudoin

A description of ionic transport in unsaturated porous materials due to gradients in the electro-chemical potential and the moisture content is developed by averaging the relevant microscopic transport equations over a representative volume element. The

EPA: LAG No. DW-13-93903501-0 Expanding a Tool for Predicting Chloride Diffusivity in Concrete So It Can Be Used by Manufacturers to Evaluate the Durability of Concrete Made With Blended Cements. Part I: Characterizing Blended Cement Materials. Final Repo

December 1, 2004

Author(s)

X Feng, Edward J. Garboczi, Jeffrey W. Bullard, Dale P. Bentz, Kenneth A. Snyder, Paul E. Stutzman, T O. Mason

Suspended Hydration and Loss of Freezable Water in Cement Pastes Exposed to 90% Relative Humidity.

December 1, 2004

Author(s)

Kenneth A. Snyder

Suspended Hydration and Loss of Freezable Water in Cement Pastes Exposed to 90% Relative Humidity

November 1, 2004

Author(s)

Kenneth A. Snyder, Dale P. Bentz

Degree of hydration and differential scanning calorimetry (DSC)measurements characterize the effect of a 90 % relative humidity (RH) environmental exposure on early cement paste hydration. Cement paste specimens 1.6 mm thick and with water-cement mass

Wave Localization in Binary Isotopically Disordered One-Dimensional Harmonic Chains With Impurities Having Arbitrary Cross Section and Concentration

September 24, 2004

Author(s)

Kenneth A. Snyder, T R. Kirkpatrick

The localization length is calculated for harmonic one-dimensional lattices havingbinary (isotopic) disorder. The results are applicable to classical strongly scattered systems having arbitrary wavelength, impurity cross section, and impurity concentration

Condition Assessment of Concrete Nuclear Structures Considered for Entombment

July 1, 2003

Author(s)

Kenneth A. Snyder

This report summarizes work to date on a project for the U.S. Nuclear Regulatory Commission to develop guidelines for the chemical and material assessment of an existing structure considered for entombment. In addition, a rational means for performing a