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Displaying 2601 - 2625 of 3908

Elastic Moduli of Model Random Three-Dimensional Closed-Cell Cellular Solids

January 1, 2001
Author(s)
A P. Roberts, Edward Garboczi
Most cellular solids are random materials, while practically all theoretical results are for periodic models. To be able to generate theoretical results for random models, the finite element method (FEM) was used to study the elastic properties of solids

Input Data for Multizone Airflow and IAQ Analysis

January 1, 2001
Author(s)
Andrew K. Persily, E M. Ivy
The use of multizone airflow and contaminant dispersal models requires a range of data. In terms of airflow analysis, these data include leakage characteristics of airflow elements, wind pressure coefficients, ventilation system characteristics such as

Measurement Considerations for the Determination of Central Plant Efficiency

January 1, 2001
Author(s)
Stephen J. Treado, Todd W. Snouffer
Concerns about maintaining optimum operating conditions for central plants in order to minimize energy usage and cost have highlighted the need for accurate measruements of electrical power, fluid flow and temperature chillers and boilers. In particular

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
Displaying 2601 - 2625 of 3908
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