Micromechanical Model for Predicting Coefficient of Thermal Expansion of Concrete
Publication: Journal of Materials in Civil Engineering
Volume 25, Issue 9
Abstract
Thermal cracking of Portland cement concrete (PCC) decreases rideability and accelerates deterioration of concrete pavements. Coefficient of thermal expansion (CTE) is one of the most important parameters to evaluate the thermal sensitivity of PCC. The AASHTO mechanistic-empirical pavement design guide (MEPDG) requires CTE as a basic input for concrete pavement design, which has increased interest in studies related to concrete CTE in the United States. Several test methods have been developed and used to determine concrete CTE. Nevertheless, concrete CTE testing is time-consuming. Most of the currently available concrete CTE prediction models are empirical and do not reflect the microstructure of PCC. This paper developed a micromechanical model based on thermal mechanical analysis to predict concrete CTE. Concrete CTE data found in the literature validated the applicability of the developed model. Factors affecting concrete CTE were examined using the proposed model. The model has the potential to estimate concrete CTE for concrete pavement design and to help select appropriate raw materials for PCC to achieve low CTE.
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Acknowledgments
This study was funded by the Tennessee Department of Transportation (TDOT). The contents of this paper reflect the views of the authors, who are solely responsible for the facts and the accuracy of the data presented herein, and do not necessarily reflect the official views or policies of the TDOT, nor do the contents constitute a standard, specification, or regulation.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 25 • Issue 9 • September 2013
Pages: 1171 - 1180
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Apr 8, 2012
Accepted: Aug 16, 2012
Published online: Aug 24, 2012
Discussion open until: Jan 24, 2013
Published in print: Sep 1, 2013
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