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Author: Kenneth Snyder

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1. Electrical Testing of Cement-Based Materials: Role of Testing Techniques, Sample Conditioning, and Accelerated Curing
Published: 4/1/2014
Authors: Robert Spragg, Yiwen Bu, Kenneth Alan Snyder, Dale P Bentz, Jason Weiss
Abstract: These projects examined the potential for using electrical testing on concrete as a potential surrogate for obtaining information on ion and fluid transport. Electrical measurements are particularly attractive for use in quality control as they are e ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914978

2. Electrical Resistivity Measurements in Cementitious Systems: Observations of Factors that Influence the Measurements
Published: 10/1/2013
Authors: Robert Spragg, Chiara Villani, Kenneth Alan Snyder, Dale P Bentz, Jeffrey W Bullard, Jason Weiss
Abstract: The electrical resistivity of concrete is increasingly measured as an indicator of its fluid transport properties, for use in quality control or for service life prediction. While electrical tests have the advantage of being easy and rapid to perfo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911960

3. Best Practices Guide for High-Volume Fly Ash Concretes: Assuring Properties and Performance
Series: Technical Note (NIST TN)
Report Number: 1812
Published: 9/18/2013
Authors: Dale P Bentz, Chiara F Ferraris, Kenneth Alan Snyder
Abstract: A best practices guide is developed from a synthesis of recent research on high-volume fly ash (HVFA) concrete mixtures. These best practices can be applied by the concrete construction industry to achieve desired properties and ensure the (high) per ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914225

4. Viscosity Modifiers to Enhance Early Age Performance and Long Term Durability of Concrete
Published: 9/1/2013
Authors: Dale P Bentz, Kenneth Alan Snyder, Max A Peltz, K H Obla, Haejin Kim
Abstract: The service life distribution of concrete structures typically follows a ,bathtubŠ-shaped function, with a finite probability of early-age failures being followed by a life with a relative low probability of failure that ultimately increases dramatic ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909952

5. Using a Saturation Function to Interpret the Electrical Properties of Partially Saturated Concrete
Published: 8/29/2013
Authors: William Jason Weiss, Kenneth Alan Snyder, Jeffrey W Bullard, Dale P Bentz
Abstract: Electrical properties are frequently measured in the concrete construction industry as a part of mixture qualification and quality control testing. While there are several factors that influence the electrical response of concrete, one of the most i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910938

6. Influence of Internal Curing and Viscosity Modifiers on Resistance to Sulfate Attack
Published: 5/13/2013
Authors: Dale P Bentz, Jeffrey M Davis, Max A Peltz, Kenneth Alan Snyder
Abstract: Sulfate attack is one of the common degradation mechanisms for concrete in severe environments. While various strategies for minimizing sulfate attack are well recognized, including using an ASTM C150 Type V cement and/or reducing water-to-cementitio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913264

7. Measurement Science Needs for the Expanded Use of Green Concrete: Workshop Summary Report
Series: Technical Note (NIST TN)
Report Number: 1783
Published: 2/6/2013
Authors: Kenneth Alan Snyder, Dale P Bentz, Jeffrey W Bullard, Chiara F Ferraris, Nicos Martys, Paul E Stutzman
Abstract: In July 2012, NIST conducted the Green Concrete Workshop to bring together stakeholders from the concrete construction industry and identify critical needs for the expanded use of industrial by- product materials, such as fly ash and slag, in conc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913076

8. Using Viscosity Modifiers to Reduce Effective Diffusivity in Mortars
Published: 8/1/2012
Authors: Kenneth Alan Snyder, Dale P Bentz, Jeffrey M Davis
Abstract: Three viscosity modifiers (a commercial shrinkage-reducing admixture, a polypropylene glycol, and cellulose ether) are used to reduce the effective diffusivity of chloride ions through mortars during a one-year exposure. Two delivery mechanisms ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908267

9. Coupling Thermodynamics and Digital Image Models to Simulate Hydration and Microstructure Development of Portland Cement Pastes
Published: 2/28/2011
Authors: Jeffrey W Bullard, Barbara Lothenbach, Paul E Stutzman, Kenneth Alan Snyder
Abstract: Equilibrium thermodynamic calculations, coupled to a kinetic model for the dissolution rates of clinker phases, have been used in recent years to predict the time-dependent phase assemblage in hydrating cement pastes. We couple this approach to a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904750

10. PERFORMANCE ASSESSMENTS INSIGHTS ON THE USE OF CEMENTS IN WASTE MANAGEMENT
Published: 11/7/2010
Authors: David W. Esh, Jacob Philip, Kenneth Alan Snyder
Abstract: The use of cementitious materials has been proposed in a variety of waste management systems because these materials can have a variety of desirable performance characteristics: hydraulic isolation, chemical isolation, structural stability. Cementit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906913



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