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Author: dale bentz
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1. 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 Zachary 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

2. Surface and Uniaxial Electrical Measurements on Layered Cementitious Composites having Cylindrical and Prismatic Geometries
Published: 7/24/2014
Authors: Robert Spragg, Scott Zachary 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

3. 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

4. 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

5. 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

6. 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

7. 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

8. Enhancing the Performance of High Volume Fly Ash Concretes Using Fine Limestone Powder
Published: 10/29/2013
Authors: Jussara Tanesi, Dale P Bentz, Ahmad Ardani
Abstract: One of the primary approaches being explored to produce more sustainable concretes consists of replacing a significant portion of the portland cement with industrial by-products. In high volume fly ash (HVFA) concretes, for example, the nominal goal ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912432

9. Fluid Transport in High-Volume Fly Ash Mixtures with and without Internal Curing
Published: 10/7/2013
Authors: Igor de la Varga, Robert Spragg, Carmelo di Bella, Javier Castro, Dale P Bentz, Jason Weiss
Abstract: The transport of fluid and ions in concrete mixtures is central to many aspects of concrete deterioration. As a result, transport properties are frequently measured as an indication of the durability that a concrete mixture may be expected to have. T ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913751

10. 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



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