Prediction of Concrete Coefficient of Thermal Expansion by Effective Self-Consistent Method Considering Coarse Aggregate Shape
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 12
Abstract
Thermal cracking is a perennial concern for large-volume concrete projects; for instance, dams and foundations. The concrete coefficient of thermal expansion (CTE) is well recognized as a key parameter influencing thermal cracking of concrete. Aggregates are volumetrically the predominant constituent of concrete. Aggregate shape varies due to rock type and manufacturing methods. However, its effect on concrete CTE has rarely been studied. This study develops an analytical approach based on effective self-consistent theory to predict concrete CTE considering coarse aggregate shape. The analytical model is validated with laboratory tests. It is found that coarse aggregate shape has little effect on concrete CTE. The influences of other factors on concrete CTE are also studied, including coarse aggregate gradation and type, coarse aggregate, and cement mortar CTEs.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 51508137, 51509139), China Postdoctoral Science Foundation (CN) (Grant Nos. 2014M560266, 2015M570108), Fundamental Research Funds for the Central Universities [DUT17RC(3)006], and Yunan Applied Basic Research Projects (Grant No. 2016FB099).
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 12 • December 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Apr 7, 2017
Accepted: Jun 4, 2018
Published online: Sep 19, 2018
Published in print: Dec 1, 2018
Discussion open until: Feb 19, 2019
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