Proposed Behavioral Model for Deicer Scaling Resistance of Slag Cement Concrete
Publication: Journal of Materials in Civil Engineering
Volume 22, Issue 4
Abstract
This study was performed to define and evaluate specific mechanisms that control deicer scaling (freeze-thaw) resistance in slag cement concrete. Modified ASTM C672 procedures were used to measure the deicer scaling resistance of concrete made with grade 120 slag cement substituted for ordinary portland cement at equal mass replacement levels of 30 and 50%. Two types of coarse aggregate, two Type I portland cement brands, and several curing methods were studied. The effects of carbonation were found to be a main cause of reduced scaling resistance in slag cement concrete, as supported by trends among curing methods and by variations in the chemical composition of portland cement. For concrete cured under ambient and low-carbonation conditions, increased carbonation is correlated with an increase in the concrete’s scaling loss. These experimental results supported a proposed behavioral model linking cement hydration, concrete carbonation, and deicer scaling resistance. Decreased scaling resistance in concrete cured under moist conditions did not correlate with carbonation, but was likely caused by other factors related to continuous moisture present during curing.
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Acknowledgments
Financial support for the research program was provided by the Wisconsin Highway Research Program of the Wisconsin Department of Transportation under Grant No. UNSPECIFIED0092-05-01. This support is gratefully acknowledged. In addition, material donations and technical consultations provided by several local and national material suppliers are very much appreciated.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 22 • Issue 4 • April 2010
Pages: 361 - 368
Copyright
© 2010 ASCE.
History
Received: Feb 12, 2009
Accepted: Jun 17, 2009
Published online: Mar 15, 2010
Published in print: Apr 2010
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