Compressive Stress–Strain Relationship of Concrete Containing Coarse Recycled Concrete Aggregate at Elevated Temperatures
Publication: Journal of Materials in Civil Engineering
Volume 31, Issue 9
Abstract
This study investigated the compressive stress-strain curves of concrete produced with coarse recycled concrete aggregate (RCA) at temperatures in the range of 20°C to 800°C. Three concrete series were produced with coarse RCA replacement levels of 0%, 50%, and 100%. The compressive properties of coarse RCA concrete at elevated temperatures, including compressive strength, modulus of elasticity, peak strain, and complete stress-strain curve, were obtained from the experiment. The experimental results show that both compressive strength and modulus of elasticity diminished with increasing temperature, whereas peak strain increased correspondingly. The effects of coarse RCA replacement level on the relative compressive properties of coarse RCA concrete were indefinite. Based on the experimental results, a model was proposed to generate the compressive stress-strain relationships for coarse RCA concrete in the 20°C to 800°C range.
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Acknowledgments
The research study was financed by the National Natural Science Foundation (No. 51508131) and China Postdoctoral Science Foundation (No. 2016M591535). Their financial support is greatly appreciated.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 31 • Issue 9 • September 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Mar 6, 2018
Accepted: Apr 1, 2019
Published online: Jun 21, 2019
Published in print: Sep 1, 2019
Discussion open until: Nov 21, 2019
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