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Edward Garboczi, Jason Weiss, Yaghoob Farnam, Yasmina Shields
Cracking in concrete due to freeze-thaw cycles is known to damage the structural integrity of materials and provides venues for water and ionic species to penetrate into concrete pores and create additional damage due to corrosion of reinforcement or
Igor de la Varga, Jose Munoz, Dale P. Bentz, Paul E. Stutzman, Benjamin Graybeal
Bond between two cementitious materials is crucial in applications such as repairs, overlays, and connections of prefabricated bridge elements (PBEs), to name just a few. It is the latter that has special interest to the authors of this paper. After
Christopher C. White, Wiener Clinton, Robert A. Weiss, Vogt D. Bryan
For the qualitative interpretation of quartz crystal microbalance (QCM) data, a decrease in frequency is generally indicative of increased coupled mass to the quartz sensor. The frequency to mass relationship is generally assumed valid without limitation
Caulks and sealants are a critical part of any structure that is exposed to the environment. Although they are good materials, they eventually fail, and the failure is often difficult to detect before extensive damage is generated by water ingress or loss
Jamie L. Weaver, Rolf Sjoblom, Eva Hjarthner-Holdar, Carolyn Pearce, Erik Ogenhall, Mia Englund, John McCloy, David Peeler, Albert Kruger
Although the modern understanding of chemistry dates back only around 300 years, many of the processes and products used today were actually originally developed by ancient people. However, much of such ancient knowledge has been lost, as is the case for
Materials exposed to outdoor weathering will change properties. Currently there are no test methods that result in predictions for those materials. This lack of an ability to predict how the properties will change with weathering results in three problems
Edward Garboczi, Yibing Zuo, Zhiwei Qian, Guang Ye
Many particle-based numerical models have been used to simulate the hydration process of cementitious materials. But most of these models employ regular shape particles, such as spheres, to represent cement, slag or fly ash, which neglect the influence of
Igor de la Varga, Javier Castro, Dale P. Bentz, Franco Zunino, Jason Weiss
Fly ash is frequently used as a replacement for cement in concrete. However, questions remain regarding the influence that fly ash has on the hydration of cement. This paper examines physical aspects (e.g., surface nucleation, cement particles spacing) and
Stephanie S. Watson, Chiara C. Ferraris, Jason D. Averill
The resilience of U.S. communities, defined as the "ability to withstand and recover rapidly from disruptive events," is directly dependent upon the ability of the built environment to maintain and support the functions upon which modern society has come
This report serves as the final report for a research project focused on increasing the usage of fly ash in transportation infrastructure. Specifically, this report addresses two phases of the research dealing with internal curing and early-age cracking
In this study, two halogen-free inorganic flame retardants, ammonium polyphosphate (APP) and aluminum hydroxide (ATH) were added to wood-flour/polypropylene composites (WPCs) at different APP to ATH mass ratios and at a constant total flame retardant
Christopher C. White, Kenneth M. White, James Pickett
Service life prediction in general and weathering lifetime in particular have been persistent problems despite nearly a century of work. Part of the problem has been a gap between the work of scientists studying material degradation and the practices
During March 20th to 24th, 2016, over 50 engineers and scientists from across the globe attended the sixth annual Service Life Prediction of Polymer Materials Conference at the Hilton Santa Fe in Santa Fe, New Mexico. Many of their presentations have