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You searched on: Author: Dale Bentz

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1. Simulation Studies of Methods to Delay Corrosion and Increase Service Life for Cracked Concrete Exposed to Chlorides
Published: 2/18/2015
Authors: Scott Z Jones, Nicos Martys, Yang Lu, Dale P Bentz
Abstract: The ingress of chlorides in reinforced concrete leads to the onset of rebar corrosion and eventually compromises a structure‰s integrity. To extend its service life and improve safety, it is crucial to develop sound repair and rehabilitation stra ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915420

2. Multi-Scale Investigation of the Performance of Limestone in Concrete
Published: 12/1/2014
Authors: Dale P Bentz, Ahmad Ardani, Tim Barrett, Scott Z Jones, Didier Lootens, Max A Peltz, Taijiro Sato, Paul E Stutzman, Jussara Tanesi, Jason Weiss
Abstract: Limestone (calcium carbonate) has long been a critical component of concrete, whether as the primary raw material for cement production, a fine powder added to the binder component, or a source of fine and/or coarse aggregate. This paper focuses on t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916188

3. Acoustic Emission and Low Temperature Calorimetry Study of Freeze and Thaw Behavior in Cementitious Materials Exposed to NaCl Salt
Published: 11/3/2014
Authors: Yaghoob Farnam, Dale P Bentz, Allison Hampton, Jason Weiss
Abstract: This paper describes a series of experiments that were performed to assess the freeze-thaw behavior of mortar samples exposed to NaCl solutions. A low-temperature longitudinal guarded comparative calorimeter was used to perform cyclic freeze-thaw te ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914444

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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



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