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William M. Pitts, James R. Lawson, John R. Shields
This report of test describes a heat-flux gage calibration system that was developed at the National Bureau of Standards during the 1970s. It is based on a commercial radiant heater incorporating a tungsten lamp and elliptical mirror. A kaleidoscope flux
J M. Torrents, T Mason, A Peled, S Shah, Edward Garboczi
The presence of small amounts of short conductive fibers in a composite of finite matrix conductivity results in the subdivision of the one matrix impedance arc into two separate low and high frequency arcs in the complex impedance plane. These features
Publication of ASHRAE and ANSI's BACnet communication protocol in 1995 ushered in a new era for building automation and control systems, making it possible to integrate building control products designed by different manufacturers. This change has proved
The widespread use of building integrated photovoltaics appears likely as a result of the continuing decline in photovoltaic manufacturing costs, the relative ease in which photovoltaics can be incorporated within the building envelope, and the fact that
This volume contains archival reports and publications produced by the National Institute of Standards and Technology and its predecessor, the National Bureau of Standards. Even though some research dates back to the 1970s, most of the work has appeared
The writers present a simple methodology, developed for use in design assisted by electronic acrodynamic and climatological databases (for short, database-assisted design), that allows a realistic assessment of wind directionality effects. The methodology
Concrete is a good example of a composite material in which the inclusions (rocks and sand) are surrounded by a thin shell of altered matrix material and embedded in a normal matrix. Concrete therefore may be viewed as consisting of a matrix material
A Peled, J M. Torrents, T Mason, S Shah, Edward Garboczi
Conductive fibers can reinforce concrete and monitor damage leading to the development of a smart material. This work studied the correlation between the electrical (DC and AC) and mechanical properties of cement composites reinforced with conductive
Integrating fire alarm systems with building automation systems can result in many economic and operational benefits. Such integration requires communication standards and careful design practices. BACnet is an internationally recognized communication
Anthony P. Hamins, S. J. Fischer, Takashi Kashiwagi
A series of measurements designed to investigate the heat feedback in pool fires burning liquid fuels are reported. Such measurements are essential for the development and validation of detailed models which predict the burning rate of liquid hydrocarbons
Richard G. Gann, Jason D. Averill, Kathryn M. Butler, Walter W. Jones, George W. Mulholland, J L. Neviaser, Thomas J. Ohlemiller, Richard D. Peacock, Paul A. Reneke, J R. Hall
Fire smoke toxicity has been a recurring theme for fire safety professionals for over four decades. There especially continue to be difficulty and controversy in assessing and addressing the contribution of the sublethal effects of smoke in hazard and risk
Joseph J. Biernacki, P J. Williams, Paul E. Stutzman
The alkali activated reaction kinetics of a type-F fly ash with calcium hydroxide (CH) and water has been investigated at temperatures between 25 and 60 C. Thermogravimetric analysis (TGA) was used to determine CH consumption and production of hydrates
Arthur H. Fanney, Brian P. Dougherty, Mark W. Davis
The photovoltaic industry is experiencing rapid growth. Industry analysts project that photovoltaic sales will increase from their current $1.5 billion level to over $27 billion by 2020, representing an average growth rate of 25%.(Cook et al. 2000)[1]. To
Steven J. Emmerich, William S. Dols, James W. Axley
Natural ventilation has the potential to reduce first costs and operating costs for some commercial buildings while maintaining ventilation rates consistent with acceptable indoor air quality. While a recent surge of interest in Europe has advanced natural
This manuscript is one of 7 sections in a report on the environmental durability of fiber-reinforced composite materials to be published and distributed by the Civil Engineering Research Foundation.
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