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The use of cementitious materials has been proposed in a variety of waste management systems because these materials can have a variety of desirable performance characteristics: hydraulic isolation, chemical isolation, structural stability. Cementitious
CONTAM is a multizone building airflow and contaminant transport computer program often used for ventilation and indoor air quality analysis. The program was recently enhanced to incorporate CFD capabilities for both external and internal environmental
Erica D. Kuligowski, Richard D. Peacock, Bryan L. Hoskins
Evacuation calculations are increasingly becoming a part of performance-based analyses to assess the level of life safety provided in buildings. In some cases, engineers are using back-of-the-envelope (hand) calculations to assess life safety, and in
Robert R. Lipman, Pingbo Tang, Daniel Huber, Burcu Akinci, Alan M. Lytle
Building information models (BIMs) are maturing as a new paradigm for storing and exchanging knowledge about a facility. BIMs constructed from a CAD model do not generally capture details of a facility as it was actually built. Laser scanners can be used
A heat pump equipped with a thermostatic expansion valve (TXV) was tested in environmental chambers during steady-state no-fault and imposed-fault operation. The studied system was an R410A split residential heat pump with an 8.8 kW nominal cooling
Nelson P. Bryner, Anthony D. Putorti Jr., Stephen P. Fuss, Bryan W. Klein
A fire occurred on the evening of June 18, 2007, in the Sofa Super Store in Charleston, SC. NIST analyzed the fire ground, consulted with other experts, and performed computer simulations of fire growth alternatives. Based on these analyses, the following
The BFRL International Standards Workshop was held on June 29 and 30, 2009 to identify opportunities for standards development organizations and U.S. industry to optimize their global competitiveness through standards, codes, and practices. For the first
Barbara C. Lippiatt, Anne L. Greig, Priya D. Lavappa
The BEES (Building for Environmental and Economic Sustainability) Online web application implements a rational, systematic technique for selecting environmentally-preferred, cost-effective building products. The technique is based on consensus standards
Data from the Economic Census provides detailed statistics on the construction industry; however, the data is only gathered every five years. The Bureau of Labor Statistics provides statistics on the construction industry on an annual basis, but these
This paper quantifies the influence of Al2O3 nanoparticles on the pool boiling performance of R134a/polyolester mixtures on a Turbo-BII-HP boiling surface. Nanofluids are liquids that contain dispersed nano-size particles. A lubricant based nanofluid
Steven J. Nabinger, Andrew K. Persily, William Stuart Dols
A retrofit study was conducted in a manufactured house to investigate the impacts of airtightening on ventilation rates and energy consumption. This paper describes the retrofits and the results of the pre- and post-retrofit assessment of building
A novel sealant-testing device was used to continuously monitor the mechanical properties of a one part silicone sealant for movement cycles initiated from 10 h to 168 h after sample creation. These cure times fall between the proposed RILEM TC139
In 2009, the National Research Council (U.S) published a report identifying the research needs of the forensic science community. In the field of fire investigation, one of the specific needs identified was research on the natural variability of burn
Building designers, contractors, owners and managers have long been challenged with providing quality indoor environments at a reasonable energy cost. Current efforts to improve building energy efficiency, including goals of netzero energy use, are
Ultrafine particles (UFP) have been related to adverse human health effects such as respiratory and cardiovascular mortality. However, human exposure to particles of outdoor origin is heavily dependent on their infiltration into homes, where most people
Mark A. Kedzierski, David Venerus, Jacopo Buongiorno, Rebecca Christianson, Jessica Townsend, In Cheol Bang, Gang Chen, Sung Jae Chung, Minking Chyu, Haisheng Chen, Yulong Ding, F. Dubois, Grzegorz Dzido, Denis Funfschilling, Quentin Galand, Jinwei Gao, Haiping Hong, Mark Horton, Lin-wen Hu, Carlo Iorio, Andrzej Jarzebski, Yiran Jiang, Stephan Kabelac, Chongyoup Kim, Ji Hyun Kim, Sukwon Kim, Thomas McKrell, Rui Ni, John Philip, Naveen Prabhat, Pengxiang Song, Stefan Van Vaerenbergh, Dongsheng Wen, Sanjeeva Witharana, Xiao-Zheng Zhao, Sheng-Qi Zhou
This article reports viscosity data on a series of colloidal dispersions collected as part of the International Nanofluid Property Benchmark Exercise (INPBE). Data are reported for seven different fluids that include dispersions of metal-oxide
A set of 209 dwellings that represent 80 % of U.S. housing stock was used to generate frequenc distributions of residential ventilation rates. The set of homes is based on an anal sis of the 1997 U.S. Department of Energ s Residential Energ Consumption
Statistical analyses of companion Bogue (ASTM C150) and quantitative X-ray powder diffraction (QXRD) estimates for cement phases are used to establish the most likely linear relationship between these two measurement techniques for alite, belite, aluminate
Santiago M. Ballester, Jose M. Corberan, Jose Gonzalvez-Macia, Piotr A. Domanski
Most of the current air-to-refrigerant heat exchanger models use the classic ε-NTU approach. These models do not account for longitudinal conduction neither in the fin nor in the tube, transverse conduction in the tube, and for the heat conduction between
A heat pump equipped with a thermostatic expansion valve (TXV) was tested in environmental chambers during steady-state no-fault and imposed-fault operation. The studied system was an R410A split residential heat pump with an 8.8 kW nominal cooling
Andrew J. Lock, Matthew F. Bundy, Erik L. Johnsson, Kelly M. Opert, Anthony P. Hamins, Cheolhong Hwang, Ki Y. Lee
Many injuries and deaths throughout the world are caused by fires each year. Many of the deaths are the result of toxic gas inhalation, such as carbon monoxide, by a victim remote from the actual fire source. In order to facilitate better building
Kathryn M. Butler, Florian Kempel, Bernhard Schartel, Anja Hofmann, Eugenio O?, Sergio R. Idelsohn, Riccardo Rossi, Julio M. Marti
The capability of the Particle Finite Element Method (PFEM, developed by CIMNE) to model the complex fire behaviour of polymers in the UL 94 scenario was investigated. For validation, a series of four PC/ABS blends were chosen, which covered different UL
Efforts are underway in several research groups to adapt existing flammability test methods for the determination of yields of toxic compounds such as CO, HCN, and HCl. These include the NFPA 269 / ASTM E 1678 radiant apparatus, the ISO/TS 19700 tube