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Fire

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Displaying 2601 - 2625 of 3902

Sensor-Driven Fire Model Version 1.1 (NISTIR 6705)

January 1, 2001
Author(s)
William D. Davis, Glenn P. Forney
Modern building fire sensors are capable of supplying substantially more information to the fire service than just the simple detection of a possible fire. With the increase in the number of sensors installed in buildings for non-fire purposes, it is

Concrete Materials Database

December 1, 2000
Author(s)
C B. Oland, Chiara C. Ferraris
ACI Committee 126 on Database Formats for Concrete Materials Properties was organized in 1990 to develop and report information on database formats for concrete and related materials. The committee is accomplishing this mission by preparing guides for use

Elastic Properties of Model Porous Ceramics

December 1, 2000
Author(s)
A P. Roberts, Edward Garboczi
The finite element method (FEM) is used to study the influence of porosity and pore shape on the elastic properties of model porous ceramics. Young's modulus of each model is practically independent of the solid Poisson's ratio. At a sufficiently high

Knowledge-Based Systems and Computational Tools for Concrete - Computer Integrated Knowledge Systems Combine Databases, Models, and Computing Tools to Address the Complex Nature of Concrete

December 1, 2000
Author(s)
Edward J. Garboczi, Dale P. Bentz, G J. Frohnsdorff
Within the Building Materials Division at the National Institute of Standards and Technology (NIST), the Hypercon Partnership for High Performance Concrete Technology [(PHPCT) http://ciks.cbt.nist.gov/phpct/] program is working to develop the materials

Workability of Self-Compacting Concrete

December 1, 2000
Author(s)
Chiara F. Ferraris, L Brower, C H. Ozyildirim, J A. Daczko
The slump test is widely used to evaluate the workability of Concrete. However it has serious drawbacks, especially for self-compacting concrete (SCC). Other flow characteristics such as viscosity or filling capacity or time of flow through an orifice are

Fire Safe Materials Project at NIST (NISTIR 6588)

November 1, 2000
Author(s)
Takashi Kashiwagi, Kathryn M. Butler, Jeffrey W. Gilman
The results of two studies, which are parts of Fire Safe Materials Project at the National Institute of Standards and Technology (NIST), are presented. One of them is a study of the effects on gasification rates of the addition of silica particles to

Flame Retardant Mechanism of Silica Gel/Silica

November 1, 2000
Author(s)
Takashi Kashiwagi, Jeffrey W. Gilman, Kathryn M. Butler, Richard H. Harris Jr., John R. Shields, A Asano
Various types of silica, silica gel, fumed silicas and fused silica were added to polypropylene and polyethylene oxide to determine their flame retardant effectiveness and mechanisms. Polypropylene was chosen as a non-char-forming thermoplastic and

Scanning Electron Microscopy in Concrete Petrography

November 1, 2000
Author(s)
Paul E. Stutzman
Scanning electron microscopy has distinct advantages for characterization of concrete, cement, and aggregate microstructure, and in the interpretation of causes for concrete deterioration. Scanning electron microscope imaging facilitates identification of

Suppression of Low Strain Rate Flames by an Agent (NISTIR 6588)

November 1, 2000
Author(s)
Anthony P. Hamins, Matthew F. Bundy, I K. Puri
The structure and suppression of low strain rate methane-air nonpremixed flames were investigated experimentally and computationally. Measurements of the critical suppression conditions were conducted using N2, CO2, and CF3Br added to the fuel or oxidizer
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