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Buildings & Construction

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Displaying 526 - 550 of 924

Rheological Characterization of Flow Table Reference Material

April 29, 2011
Author(s)
Chiara F. Ferraris, Haleh Azari
The flow table is a standardized test that is widely used to qualify a mortar to be tested for compressive strength and air content. It is also the only standard test to quantify a mortar workability property. Therefore, the calibration of this device is

Critical Observations for the Evaluation of Cement Hydration Models

April 22, 2011
Author(s)
Dale P. Bentz
The development of computer models for cement hydration and microstructure development that has accelerated in the past 25 years has created a need for a set of critical experimental observations that can be used in evaluating the model predictions. During

LABORATORY ACCELERATED AND NATURAL WEATHERING OF STYRENE-ETHYLENE-BUTADIENE-STYRENE (SEBS) BLOCK COPOLYMER: ACCELERATION AND CORRELATION

March 23, 2011
Author(s)
Kar T. Tan, Christopher C. White, David J. Benatti, Deborah S. Jacobs, Donald L. Hunston
Indoor accelerated and outdoor field weathering of styrene-ethylene-butadiene-styrene block copolymer have been studied by Fourier transform infrared (FTIR) spectroscopy. In the indoor accelerated experiments, specimens are exposed to ultraviolet-visible

The Role of Service Life Prediction In Sustainability Determinations

February 14, 2011
Author(s)
Christopher C. White, Kar T. Tan, Donald L. Hunston
Sustainability calculations are based on assumptions about the energy required to produce, transport place in-service items. A critical component of these calculations is the expected service life of the material, component or system. Estimates of the

Internal Curing: A 2010 State-of-the-Art Review

February 9, 2011
Author(s)
Dale P. Bentz, Jason Weiss
The American Concrete Institute in 2010 defined internal curing as supplying water throughout a freshly placed cementitious mixture using reservoirs, via pre-wetted lightweight aggregates, that readily release water as needed for hydration or to replace

Optimization of Particle Sizes in High Volume Fly Ash Blended Cements

February 2, 2011
Author(s)
Dale P. Bentz, Chiara F. Ferraris, James J. Filliben
One major objective of the sustainable construction movement is to decrease the energy and carbon dioxide footprints of concrete. Since the production of portland cement is a major contributor in both of these areas, concretes with increasing quantities of

New approach to calibrate the mortar flow table

January 27, 2011
Author(s)
Chiara F. Ferraris, Haleh Azari
The flow table is a standardized test that is widely used to qualify a mortar to be tested for compressive strength and air content. It is also the only standard test to quantify a mortar workability property. Therefore, the calibration of this device is

Hotter Cements, Cooler Concretes

January 3, 2011
Author(s)
Dale P. Bentz, Casimir Bognacki, Kyle Riding, Victor Villarreal
In the past 50 years, portland cements have become progressively finer, in order to meet increasing demands for fast-track construction, etc. While finer cements produce higher early-age strengths, they also increase early-age heat release which can
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