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You searched on: Author: dale bentz

Displaying records 11 to 20 of 201 records.
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11. Determinacion de Propiedades Termo-Fisicas durante la Hidratacion de Materiales Base Cemento Utilizando CEMHYD3D
Published: 10/17/2014
Authors: Emilio Hernandez-Bautista, Dale P Bentz, Sadoth Sandoval-Torres, Prisciiano Cano Barrita
Abstract: Steam curing under atmospheric pressure is used routinely in the precast concrete industry because of the increase in compressive strength up to 70 % obtained in only one day. However, this process requires high-energy consumption to maintain a const ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=918104

12. Modeling Heat and Moisture Transport During Hydration of Cement-Based Materials in Semi-Adiabatic Conditions
Published: 10/10/2014
Authors: Emilio Hernandez-Bautista, Dale P Bentz, Sadoth Sandoval-Torres, Prisciiano Cano Barrita
Abstract: The process of accelerated curing of pre-cast concrete consists in increasing the temperature within a saturated water vapor atmosphere during several hours. In this process, the cement hydration has a significant importance in the thermal behavior o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=918103

13. Real-World Considerations for Predicting Service Life of Steel-Reinforced Concrete Exposed to Chlorides
Published: 9/1/2014
Authors: Dale P Bentz, W. Spencer Guthrie, Scott Z Jones, Nicos Martys
Abstract: The prediction of concrete service life is of paramount importance for upgrading our nation‰s built infrastructure. Although computer models for predicting the service life of reinforced concrete exposed to chlorides (e.g., road salts) have been deve ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915806

14. Surface and Uniaxial Electrical Measurements on Layered Cementitious Composites having Cylindrical and Prismatic Geometries
Published: 7/24/2014
Authors: Robert Spragg, Scott Z Jones, Kenneth Alan Snyder, Dale P Bentz, Chiara Villani, Jason Weiss
Abstract: Electrical measurements are becoming a common method to assess the transport properties of concrete. For a saturated homogenous system, the surface resistance and the uniaxial resistance measurements provide equivalent measures of resistivity once g ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915854

15. Activation Energies of High-Volume Fly Ash Ternary Blends: Hydration and Setting
Published: 7/17/2014
Author: Dale P Bentz
Abstract: Because ready-mixed concrete is placed under a wide variety of environmental conditions, the influence of temperature on the hydration reactions and the accompanying setting (hardening) process is of critical importance. While contractors are general ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914612

16. Anticipating the Setting Time of High-Volume Fly Ash Concretes Using Electrical Measurements: Feasibility Studies Using Pastes
Published: 7/17/2014
Authors: Dale P Bentz, Kenneth Alan Snyder, Amzaray M Ahmed
Abstract: One common concern limiting the proliferation of high-volume fly ash (HVFA) concrete mixtures is the significant delay in setting that is sometimes encountered in field concrete mixtures. While several methods to mitigate the delayed setting times of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914999

17. Measuring Freeze and Thaw Damage in Mortars Containing Deicing Salt Using a Low Temperature Longitudinal Guarded Comparative Calorimeter and Acoustic Emission (AE-LGCC)
Published: 6/23/2014
Authors: Yaghoob Farnam, Dale P Bentz, Aaron Richard Sakulich, Daniel Robert Flynn, Jason Weiss
Abstract: Deicing salts are often applied to the surface of pavements and bridge decks in the winter to melt ice; thereby improving safety for the travelling public. In this paper, the influence of NaCl deicing salt on freezing and thawing temperatures of pore ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913946

18. 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

19. Influence of Internal Curing and Viscosity Modifiers on Resistance to Sulfate Attack
Published: 4/1/2014
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

20. Accelerated and Natural Carbonation of Concretes with Internal Curing and Shrinkage/Viscosity Modifiers
Published: 1/5/2014
Authors: Alejandro Duran-Herrera, Jose Manuel Mendoza-Rangel, Edgar de los Santos Rodriguez, Francisco Vazquez, P Valdez, Dale P Bentz
Abstract: In many parts of the world, corrosion of reinforcing steel in concrete induced by carbonation of the concrete continues to be a major durability concern. This paper investigates the accelerated and natural carbonation resistance of a set of 7 concret ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914100



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