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A three-story unreinforced brick building in Clinton, MO, collapsed on June 26, 2006 causing one fatality. The building was built in the 1880s. Two NIST structural engineers visited the collapse site on June 29, 2006. The NIST engineers inspected the
The concurrent goals of cement hydration are to percolate (bridge) the original cement particles into a load-bearing network and to depercolate (dam) the original water-filled capillary porosity. The initial volume, particle size distribution, and
This paper summarizes the main changes to the Department of Energy's test procedure for residential dishwashers and presents the analysis of manufacturers test results using the new test procedure. The rest results, which showed a small increase in energy
Stephen J. Treado, Mark A. Kedzierski, Stephanie S. Watson, Dale P. Bentz, Nicos Martys, Kenneth D. Cole
This report describes the results of the first phase of a research project to evaluate how contaminants accidentally or intentionally introduced into the water supply might accumulate in building plumbing systems, and how these contaminants might be
Chiara F. Ferraris, William F. Guthrie, A Aviles, Robin K. Haupt, Bruce S. MacDonald
The standard reference material (SRM) for fineness of cement, SRM 114, is an integral part of the calibration material routinely used in the cement industry to qualify cements. Being a powder, the main physical properties of cement, prior to hydration, are
Chiara F. Ferraris, Max A. Peltz, William F. Guthrie, A Aviles, Robin K. Haupt, Bruce S. MacDonald
The standard reference material (SRM) for fineness of cement, SRM 114, is an integral part of the calibration material routinely used in the cement industry to qualify cements. Being a powder, the main physical properties of cement, prior to hydration, are
The purpose of this report is to establish the method for determining the cooling performance ratings of air-source unitary split-system air conditioners and heat pumps consisting of an outdoor section and an indoor section that were not tested together as
Daniel M. Madrzykowski, Nelson P. Bryner, Stephen Kerber
A fire occurred on the night of February 20, 2003, at The Station Nightclub located in West Warwick, Rhode Island. A band that was performing that night, during its performance, used pyrotechnics that ignited foam insulation lining the walls and part of
A test method and rating standard is proposed for residential fuel cell systems (RFCS). The proposed approach extends previously developed test procedures for fuel cells by establishing specific test methods and calculation procedures that are applicable
To test the ability of the Virtual Cement and Concrete Testing Laboratory (VCCTL) software to predict cement hydration properties, characterization of mineralogy and phase distribution is necessary. Compositional and textural characteristics of Cement and
This paper presents an analytical evaluation of isobutene (R600a), propane (R290), R134a, R22, R41OA, and R32 in a vapor compression system used for comfort cooling applications. The evaluation method was based on a system simulation model that was
Wind loads for use in structural design are based in part on extreme value analysis of historical wind speed data for the location of interest. In some cases wind direction data are also required to characterize the directionality of the local wind climate
This paper is a condensed version of a chapter in the forthcoming Next Generation Program (NGP) final report edited by the authors. It summarizes the research conducted during the NGP program on fluid dispensing and dispersion within aircraft engine
F Takahashi, Gregory T. Linteris, Vishwanath R. Katta
The structure and extinguishment of heptane-air co-flow diffusion flames formed on a cup burner in normal earth gravity have been studied experimentally and computationally. A gaseous fire-extinguishing agent (CO2) was introduced gradually into a coflowing
Dale P. Bentz, Edward J. Garboczi, Jeffrey W. Bullard, Chiara F. Ferraris, Nicos Martys, Paul E. Stutzman
Concrete is a unique multi-phase, random, complex, and composite material that provides both strength and impermeability to engineered structures. Unlike most construction materials, the properties of concrete continue to develop over time and in place an