Carbon-Fiber-Reinforced Polymer Repair to Extend Service Life of Corroded Reinforced Concrete Beams
Publication: Journal of Composites for Construction
Volume 9, Issue 2
Abstract
This paper presents the results of an experimental study designed to investigate the viability of using externally bonded carbon-fiber-reinforced polymer (CFRP) laminates to extend the service life of corroded reinforced concrete (RC) beams. A total of 14 beams, each, were tested. Three beams were not corroded; two of them were strengthened by CFRP laminates, while one specimen was kept as a virgin. The remaining 11 beams were subjected to different levels of corrosion damage up to a 31% steel mass loss using an impressed current technique. Six of the corroded beams were repaired with CFRP laminates, whereas the remaining five beams were not repaired. Eventually, all specimens were tested to failure under four-point bending. Corrosion of the steel reinforcement significantly reduced the load-carrying capacity of RC beams. At all levels of corrosion damage, CFRP repair increased the ultimate strengths of the corroded beams to levels higher than the strength of the virgin beam but significantly reduced the deflection capacity.
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Acknowledgments
This work is supported in part by research funding from the Network of Centers of Excellence ISIS Canada on Intelligent Sensing for Innovative Structures, the Natural Sciences and Engineering Research Council (NSERC), the Ministry of Training—Colleges and Universities (OGS Scholarship), and Sika Canada for the donation of CFRP composites. Their contributions are greatly appreciated. The authors wish to thank the civil engineering technicians at the University of Waterloo for their help throughout the testing.
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© 2005 ASCE.
History
Received: Nov 13, 2003
Accepted: Jul 7, 2004
Published online: Apr 1, 2005
Published in print: Apr 2005
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