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Displaying 1401 - 1425 of 3873

Certification of SRM 114q: Part I

June 14, 2006
Author(s)
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

Certification of SRM 114q: Part II

June 14, 2006
Author(s)
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

Feasibility on Using a Concrete Mixing Truck as a Rheometer

June 14, 2006
Author(s)
S Amziane, Chiara C. Ferraris, E Koehler
Fresh concrete properties are crucial for the performance of the concrete in its hardened state. The measurement of workability is usually done using a simple slump test. This test, although widely used for almost 100 years, does not provide a full picture

NIST Station Nightclub Fire Investigation: Physical Simulation of the Fire

June 1, 2006
Author(s)
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

Fluid Dispensing and Dispersion

May 16, 2006
Author(s)
Jiann C. Yang, David R. Keyser
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

Further Studies of Cup-Burner Flame Extinguishment.

May 16, 2006
Author(s)
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

Virtual Testing of Cement and Concrete

May 10, 2006
Author(s)
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

Comparison of Photovoltaic Module Performance Measurements

May 2, 2006
Author(s)
Arthur H. Fanney, Mark W. Davis, Brian P. Dougherty, D L. King, W E. Boyson, J A. Kratochvil
Computer simulation tools used to predict the energy production of photovoltaic systems are needed in order to make informed economic decisions. These tools require input parameters that characterize module performance under various operational and

An Improved Two-Phase Pressure Drop Correlation for 180 degrees Return Bends

May 1, 2006
Author(s)
Piotr A. Domanski, Christian Hermes
A new correlation for two-phase flow pressure drop in 180? return bends is proposed based on a total of 241 experimental data points for R-22 and R-410A. The data span smooth tubes with inner diameters (D) from 3.25 mm to 11.63 mm, bend radiuses (R) from 6

Chemical and Physical Characterization of Poly(p-phenylene benzobisoxazole) Fibers Used in Body Armor

May 1, 2006
Author(s)
Joannie W. Chin, E Byrd, Amanda L. Forster, Xiaohong Gu, Tinh Nguyen, Kirk D. Rice, Walter J. Rossiter Jr, S J. Scierka, John R. Sieber, Paul E. Stutzman, Li Piin Sung
Problems with the performance and durability of body armor based on poly(p-phenylene benzobisoxazole (PBO) fiber became apparent in the summer of 2003, when PBO-based body armor that was less than 8 months was penetrated by a bullet. Mechanical testing of
Displaying 1401 - 1425 of 3873
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