Temperature-Dependent Coefficient of Thermal Expansion of Concrete in Freezing Process
Publication: Journal of Engineering Mechanics
Volume 143, Issue 8
Abstract
The coefficient of thermal expansion (CTE) of concrete depends on temperature, the internal structure of concrete, and the moisture content in concrete. An analytical model was developed to characterize the CTE of concrete under low temperatures. Three pore configurations are defined as pores with water and pores with ice. The effective strain of concrete is a combination of three processes during the cooling process, each containing a different configuration of pores. A general multiphase model for the effective expansion (and contraction) of concrete with a certain amount of ice was developed. The model can predict effective strain at different temperatures, which can reflect the influences of concrete pore size distribution and volume fractions of different phases. The predictions by the present model were compared with some available experimental data, and they agreed very well.
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Acknowledgments
The authors wish to acknowledge the partial support by the U.S. Department of Energy under grant DE-NE0000659-0003 to University of Colorado Boulder, the Natural Science Foundation of China (51408537), the Key Project Supported by Zhejiang Provincial Natural Science Foundation of China (LZ16E080002), and the Fundamental Research Funds for the Central Universities (2016FZA4014). Opinions expressed in this paper are those of the authors and do not necessarily reflect those of the sponsor.
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Published In
Journal of Engineering Mechanics
Volume 143 • Issue 8 • August 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Aug 12, 2016
Accepted: Dec 22, 2016
Published online: Mar 6, 2017
Published in print: Aug 1, 2017
Discussion open until: Aug 6, 2017
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