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You searched on: Author: dale bentz

Displaying records 31 to 40 of 193 records.
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31. Relating Compressive Strength to Heat Release in Mortars
Published: 9/4/2012
Authors: Dale P Bentz, Tim Barrett, Igor de la Varga, William Jason Weiss
Abstract: Conventionally, isothermal calorimetry and ASTM C186 heat of hydration results are reported on a per mass of cement (powder) basis, with typical units being J/g cement for example. Based on the recognition that it is the filling of porosity with hyd ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910338

32. Application of Internal Curing for Mixtures Containing High Volumes of Fly Ash
Published: 8/1/2012
Authors: Igor de la Varga, Javier Castro, Dale P Bentz, Jason Weiss
Abstract: Sustainability has become an important issue in the concrete industry in recent years. One way to make concrete more sustainable is through the replacement of portland cement clinker with alternative cementitious materials such as fly ash. While fly ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910049

33. Increasing the Service Life of Bridge Decks by Incorporating Phase Change Materials (PCMs) to Reduce Freeze/Thaw Cycles
Published: 8/1/2012
Authors: Aaron Richard Sakulich, Dale P Bentz
Abstract: During a freezing event, pore solution in cementitious bodies expands and creates stresses that can cause damage; therefore, reducing the number of freeze/thaw cycles experienced by a structure will extend the structure‰s service life. The incorp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908535

34. 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

35. Incorporation of Phase Change Materials in Cementitious Systems via Fine Lightweight Aggregate
Published: 6/1/2012
Authors: Aaron Richard Sakulich, Dale P Bentz
Abstract: As infrastructure nears the end of its service life, society is facing an unprecedented maintenance crisis. A new technique that may be able to help address this crisis, extending the service life of bridge decks by reducing freeze/thaw damage th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910167

36. Modeling Cement Hydration Kinetics Using the Equivalent Age Concept
Published: 3/29/2012
Authors: Xueyu Pang, Dale P Bentz, Christian Meyer
Abstract: In this study the hydration kinetics of four different types of cements during early ages were investigated by both chemical shrinkage and isothermal calorimetry tests. Chemical shrinkage tests were performed at both different temperatures and pressu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910050

37. Influence of Particle Size Distributions on Yield Stress and Viscosity of Cement-Fly Ash Pastes
Published: 2/1/2012
Authors: Dale P Bentz, Chiara F Ferraris, Michael A Galler, John Guynn, Andrew Hansen
Abstract: The rheological properties of blended cement-based materials depend strongly on mixture proportions and the characteristics of the components, such as cement and fly ash. In this study, design of experiments is used to investigate the influence of t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906927

38. Internal Curing - Constructing More Robust Concrete
Published: 1/19/2012
Authors: Jason Weiss, Dale P Bentz, Anton Schlinder, Pietro Lura
Abstract: It is often said that there are two types of concrete: concrete that has cracked and concrete that is going to crack. Unfortunately, this is true all too frequently. Many of these unwanted cracks develop shortly after the concrete is placed and in ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910059

39. Analysis of Early-Age Bridge Deck Cracking in Nevada and Wyoming
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7841
Published: 1/17/2012
Authors: Dale P Bentz, Paul E Stutzman, Aaron Richard Sakulich, William Jason Weiss
Abstract: In late 2009, the Echo Wash and Valley of Fire bridge decks were constructed in the Lake Mead National Recreation area in Nevada. Within six months, in early 2010, both decks exhibited considerable transverse cracking, with some cracks extendin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910303

40. Fine Limestone Additions to Regulate Setting in High Volume Fly Ash Mixtures
Published: 1/2/2012
Authors: Dale P Bentz, Taijiro Sato, Igor de la Varga, Jason Weiss
Abstract: High volume fly ash (HVFA) concrete mixtures are being considered more frequently due to their cost and sustainability advantages. While the long term performance of these HVFA concretes typically meets or exceeds that of conventional concretes, the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908529



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