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Buildings & Construction

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Displaying 476 - 500 of 924

Internal Curing - Constructing More Robust Concrete

January 19, 2012
Author(s)
Jason Weiss, Dale P. Bentz, Anton Schlinder, Pietro Lura
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 addition

Analysis of Early-Age Bridge Deck Cracking in Nevada and Wyoming

January 17, 2012
Author(s)
Dale P. Bentz, Paul E. Stutzman, Aaron R. Sakulich, William J. Weiss
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 extending through

Fine Limestone Additions to Regulate Setting in High Volume Fly Ash Mixtures

January 2, 2012
Author(s)
Dale P. Bentz, Taijiro Sato, Igor de la Varga, Jason Weiss
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, their

Thermal Properties and Thermal Modeling of Ballistic Clay Box

December 30, 2011
Author(s)
Dale P. Bentz, Amanda L. Forster, Kirk D. Rice, Michael A. Riley
A critical component of hard and soft body armor testing is the utilization of a clay block behind the component being evaluated. One of the performance metrics used to evaluate products is the penetration depth into the clay of an indentation produced by

Service Life Prediction for Sealants

September 29, 2011
Author(s)
Christopher C. White, Donald L. Hunston, Kar T. Tan, James J. Filliben
Previous industry consensus postulated that four elements of the weather: Temperature, Humidity, Ultraviolet Radiation, and Mechanical loading were responsible for the majority of the changes observed in sealants exposed to outdoor weathering. The NIST
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