Performance of Postcured CFRP–Strengthened Reinforced Concrete Beams at Elevated Temperatures
Publication: Journal of Composites for Construction
Volume 21, Issue 4
Abstract
The bond performance of fiber-reinforced polymers (FRPs) at elevated temperature depends upon the glass transition temperature of the matrix material. Included herein is an overview of the results of an experimental program in which postcuring of carbon fibre reinforced polymer (CFRP)-strengthened reinforced concrete beams was evaluated to observe changes in performance at elevated temperatures. Fourteen beams were tested in four-point bending. The testing schemes included 1 unstrengthened control beam, 2 room-temperature strengthened beams, and 11 high-temperature tests. The results of this experimental program have demonstrated that postcuring an FRP system can be an effective means of increasing the performance of FRP-strengthened beams when subjected to elevated temperatures, even those well in excess of the glass transition temperature of the FRP.
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Acknowledgments
The authors would like to thank Rick Sherping at Sika Canada and the staff of the Department of Civil Engineering at Queen’s University. Funding was provided by the Natural Sciences and Engineering Research Council of Canada, Halsall Associates, and Mitacs.
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Information & Authors
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Published In
Journal of Composites for Construction
Volume 21 • Issue 4 • August 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: May 7, 2016
Accepted: Oct 13, 2016
Published ahead of print: Feb 6, 2017
Published online: Feb 7, 2017
Discussion open until: Jul 7, 2017
Published in print: Aug 1, 2017
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