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Buildings & Construction

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Displaying 826 - 850 of 3869

VISCOSITY AND DENSITY OF CuO NANOLUBRICANT

June 14, 2012
Author(s)
Mark A. Kedzierski
This paper presents liquid kinematic viscosity and density measurements of a synthetic polyolester based copper (II) oxide (CuO) nanoparticle dispersion (nanolubricant) at atmospheric pressure for a temperature range from approximately 288 K to 318 K. The

Certification of SRM 2492: Bingham Paste Mixture for Rheological Measurements

June 7, 2012
Author(s)
Chiara F. Ferraris, Paul E. Stutzman, William F. Guthrie
Rheological measurements are often performed using a rotational rheometer. In this type of rheometer, the tested fluid is sheared between two surfaces, one of which is rotating [1]. Usually, the angular velocity is imposed and the response of the material

Framework for hybrid life-cycle inventory databases: BEES case study

June 1, 2012
Author(s)
Sangwon Suh, Barbara C. Lippiatt
In an effort to develop a whole building LCA tool, NIST is transforming new bottom-up BEES data into a hybrid database in which the strengths of both bottom-up and top-down approaches can be combined. The objective of this paper is to describe the

Proposed General Approach to Fire-Safety Scenarios

May 29, 2012
Author(s)
Amanda P. Robbins, Erica D. Kuligowski, Steve M. Gwynne
A systematic approach to the identification of fire-safety scenarios for analysis is desirable in order to identify important scenarios and to help ensure a consistent approach for different analysts. The number of possible fire-safety scenarios in any

Investigation Plan - National Institute of Standards and Technology (NIST) Technical Investigation of Building and Emergency Communications System Performance in the Joplin, Missouri, Tornado of May 22, 2011

May 24, 2012
Author(s)
Marc L. Levitan, Long T. Phan, Erica D. Kuligowski, Franklin T. Lombardo, David P. Jorgensen
Following the May 22, 2011 tornado that devastated the City of Joplin, NIST sent four engineers to Missouri on May 24 through May 28 to conduct a preliminary reconnaissance. Based on analysis of the data collected and other criteria required by law and

A Case Study of 3D Imaging Productivity Needs to Support Infrastructure Construction

May 23, 2012
Author(s)
Gabriel Dadi, Paul Goodrum, Kamel Saidi, Christopher U. Brown, Joseph Betit
The national infrastructure system is at a crossroads with a need for renewal and expansion in the most efficient manner possible. Light railway construction requires the installation of embedments in reinforced concrete pavement along the length of

Image-based 3D Mapping of Rebar Location for Automated Assessment of Safe Drilling Areas Prior to Placing Embedments in Concrete Bridge Decks

May 23, 2012
Author(s)
Mani Golparvar-Fard, Behshad Ghadimi, Kamel Saidi, Geraldine Cheok, Marek Franaszek, Robert R. Lipman
This paper presents a new image-based approach for 3D mapping the locations of the rebar and embedded components in a railway bridge deck prior to placement of concrete. Our approach enables practitioners to quickly and automatically identify where the

Effect of Diamond Nanolubricant on R134a Pool Boiling Heat Transfer

May 21, 2012
Author(s)
Mark A. Kedzierski
This paper quantifies the influence of diamond nanoparticles on the boiling performance of R134a/polyolester mixtures on a roughened, horizontal, flat surface. Nanofluids are liquids that contain dispersed nano-size particles. A lubricant based nanofluid

Indoor Air Quality in Sustainable, Energy Efficient Buildings

May 15, 2012
Author(s)
Andrew K. Persily, Steven J. Emmerich
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 sustainability and net-zero

Concrete rheometers

May 1, 2012
Author(s)
Chiara F. Ferraris, Nicos Martys
The scope of this chapter is to introduce the current technology for measuring the rheological properties of concrete. The need to evaluate or assess the flow properties of concrete has resulted in the invention or design and standardization of hundreds of

Strategic Roadmap for Fire Risk Reduction in Buildings and Communities

April 18, 2012
Author(s)
Anthony P. Hamins, Jason D. Averill, Richard G. Gann, Nelson P. Bryner, Rick D. Davis, David T. Butry, Alexander Maranghides, Jiann C. Yang, Daniel M. Madrzykowski, Matthew F. Bundy, Samuel L. Manzello, Jeffrey W. Gilman, Francine K. Amon, William E. Mell
The burden of fire on the U.S. economy continues to be large, comprising approximately $280 billion annually, or 2 percent of GDP. Over the last 30 years, civilian fire deaths and injuries have decreased due to the efforts of many people and organizations

Flexible polyurethane foam with well characterized and reproducible smoldering

March 24, 2012
Author(s)
Mauro Zammarano, Szabolcs Matko, Rick D. Davis, Roland H. Kraemer
Smoldering is a self-sustaining heterogeneous oxidation reaction that induces a slow, low temperature, flameless combustion.1 Flexible polyurethane foams (PUF) are particularly prone to smoldering due to their high air permeability and low density. In this

Assessment of Factors Affecting Fire Performance of Mattresses: A Review

March 20, 2012
Author(s)
Shonali Nazare, Rick D. Davis
An in-depth analysis of U.S. residential fire statistics shows that although the total number of fires and deaths due to mattress fires has dropped as a result of several regulatory approaches, the number of deaths per 1000 mattress/bedding fires has

Developing Emergency Communication Strategies for Buildings

March 12, 2012
Author(s)
Erica D. Kuligowski, Steve M. Gwynne, Kathryn M. Butler, Bryan L. Hoskins, Carolyn Sandler
The purpose of this document is to provide the foundation for the development of a guidance document on emergency communication message content and dissemination strategies. The document answers three major questions regarding emergency communication

EFFECT OF AL2O3 NANOLUBRICANT ON A TURBO-BII R134A POOL BOILING SURFACE

March 3, 2012
Author(s)
Mark A. Kedzierski
This paper quantifies the influence of Al2O3 nanoparticles on the pool boiling performance of R134a/polyolester mixtures on a Turbo-BII-HP boiling surface. An Al2O3 nanolubricant (a lubricant containing dispersed nano-size particles) was made by suspending
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