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The history of testing heat insulators at the National Institute of Standards and Technology (formerly the National Bureau of Standards is nearly as long as the history of the institute itself. The participation of the institute in building research
Although fiber-reinforced polymer (FRP) composites are increasingly being used for the renewal of civil infrastructure, there are still some major questions related to the durability of these materials in a civil engineering environment. This concern is
D Ragahavan, X. Gu, Tinh Nguyen, Mark R. VanLandingham
Characterization of polymer coatings microstructure is critical to the fundamental understanding of corrosion of coated metals. In this paper an approach for mapping chemical heterogeneity of a polymer system using chemical modification and tapping mode
This user's guide provides instructions for and examples of using the Concrete Optimization Software Tool (COST), a joint product of the Federal Highway Administration and the National Institute of Standards and Technology. COST provides an internet-based
This paper investigates the effect that bulk lubricant concentration has on the non-adiabatic lubricant excess surface density on a roughened, horizontal flat pool-boiling surface. Both pool boiling heat transfer data and lubricant excess surface density
Emil Simiu, A N. Heckert, James J. Filliben, Steven K. Johnson
We present a contribution to the current debate on whether it is more appropriate to fit a Gumbel distribution to the time series of the extreme dynamic pressures (i.e. of the squares of the extreme wind speeds) than to fit an extreme value distribution to
Fundamental studies of the early-age desiccation of cement-based materials with and without a shrinkage-reducing admixture (SRA) have been performed. Studies have been conducted under both sealed and drying conditions. Physical measurements include mass
The control of outdoor air intake rates in mechanically ventilated buildings based on indoor carbon dioxide (CO 2) levels, often referred to as CO 2 demand controlled ventilation (DCV), has the potential for reducing the energy consumption associated with
The standard test method for evaluaating sealant performance is the ASTM C719; a threshold or torture test bsed upon the pioneering work of NIST researcher Athur Hockman. This article will detail efforts to move away from the use of threshold tests towards
This paper is a derivative of G2001-1392, Database-Assisted Wind Load Capacity Estimates for Low-Rise Steel Frames, by Jang, S., et al., intended for publication in the Journal of Structural Engineering.The original paper's abstract was:A comparative study
Smokeview is a software tool designed to visualize numerical predictions generated by the NIST Fire Dynamics Simulator(FDS), a computational fluid dynamics (CFD) model of fire-driven fluid flow. These two tools are typically used in concert to respectively
Paul E. Stutzman, David S. Bright, Edward J. Garboczi
Concrete petrography is used to assess damaged concrete in order to determine the probable mechanism of damage. However, using traditional petographic analyses. it is often difficult to say what mechanisms caused the crack damage, since many deterioration
In this brief communication, a new approach to generalize the lattice Boltzmann method to produce fluid flow consistent with the Brinkman equation is presented. The method described in this communication both eliminates second order errors in velocity and
One potential breakthrough technology that stands to revolutionize construction surveying and status monitoring is known as laser range imaging. The device used to obtain the field data is known as a LADAR (Laser Distance and Ranging). With LADAR it is
A series of experiments were conducted to investigate measurement technologies that are necessary and appropriate for evaluating the thermal performance of fire fighter protective clothing under low heat flux (≤5.0 kW/m2) exposure conditions and for
The NIST Refrigerants Program was initiated in 1981 under the sponsorship of the Electric Power Research Institute with the intent to determine if a zeotropic mixture, operating in a Lorentz Cycle, could be found that would give superior performance to the
Fumiaki Takahashi, Gregory T. Linteris, Vishwanath R. Katta
A fire, whether in a spacecraft or in occupied spaces on extraterrestrial bases, can lead to mission termination or loss of life. While the fire-safety record of US space missions has been excellent, the advent of longer duration missions to Mars, the moon
Trioxane, a weakly bound polymer of formaldehyde (C3H6O3, melting point 61 deg C, boiling point 115 deg C), is a uniquely suited compound for studying material flammability. Like many of the more commonly used materials for such tests (e.g. delrin
The Congressional emergency appropriation resulting from the January 17, 1994, Northridge earthquake provided the Building and Fire Research Laboratory (BFRL) at the National Institute of Standards and Technology (NIST) an opportunity to expand its
BFRL Publications, 2000, contains publications produced by or for BFRL staff during 2000. Volume 1 contains Building Research Publications and Volume 2 contains Fire Research publications. We also have included software for solving problems related to
Robert R. Zarr, V Martinez-Fuentes, James J. Filliben, Brian P. Dougherty
Calibration measurements of thin heat flux sensors for building applications are presented. The findings support the continued development of precision and bias statements for ASTM Practice C 1130. Measurements have been conducted using a 1016 mm diameter
Nanometer-scale plowing friction and wear of a polycarbonate thin film were directly measured using an atomic force microscope (AFM) with nanoscratching capabilities. During the nanoscratch tests, lateral forces caused discrepancies between the maximum
The International Air-Conditioning, Heating, Refrigerating Exposition that accompanied the 2001 ASHRAE Winter meeting in Atlanta included the largest interoperability demonstration of BACnet products ever held. It marked the five-year anniversary of the
M E. McKnight, Theodore V. Vorburger, Egon Marx, Maria E. Nadal, P Y. Barnes, Michael A. Galler
Comparisons are made between calculations and measured angle-resolved light scattering distributions from clear dielectric isotropic epoxy coatings over a range of rms roughness conditions, resulting in strongly specular scattering characteristics