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You searched on: Author: dale bentz

Displaying records 11 to 20 of 202 records.
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11. Using Acoustic Emission Waveform Characterization to Ascertain Where Cracks Originate in Concrete
Published: 4/27/2015
Authors: Yaghoob Farnam, M R Geiker, Dale P Bentz, Jason Weiss
Abstract: Different constituents of concrete can have cracking behavior that varies in terms of the acoustic waveform that is generated. Understanding the waveform may provide insight into the source and behavior of a crack that occurs in a cementitious compos ...

12. D90: The strongest contributor to setting time in MTA and Portland Cement
Published: 4/15/2015
Authors: William Ha, Dale P Bentz, Wyatt Kahler, Laurence Walsh
Abstract: Introduction: The setting times of commercial mineral trioxide aggregate (MTA) and Portland cements vary. It was hypothesized that much of this variation was due to differences in particle size distribution. Methods: Two gram samples from 11 MTA ...

13. Design and Performance of Ternary Blend High-Volume Fly Ash Concretes of Moderate Slump
Published: 3/27/2015
Authors: Dale P Bentz, Scott Z Jones, Kenneth Alan Snyder
Abstract: One approach to increasing the sustainability of concrete construction is to replace a significant portion of the ordinary portland cement (OPC) with a supplementary cementitious material, such as fly ash. This paper presents mixture proportions and ...

14. 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 ...

15. 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 ...

16. 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 ...

17. 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 ...

18. 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 ...

19. 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 ...

20. 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 ...

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