Behavior of CFRP Strengthened Reinforced Concrete Beams in Corrosive Environment
Publication: Journal of Composites for Construction
Volume 11, Issue 3
Abstract
This paper reports the test results of 11 reinforced concrete beams strengthened with carbon fiber-reinforced polymer (CFRP) sheets and subjected to an aggressive environment. In this study, eight beams were cracked and repaired with CFRP sheets, while the remaining three beams were kept uncracked as a control. The beams were wide by deep by long and lightly reinforced with a reinforcement ratio of 0.6%. Two types of carbon FRP products were considered: Sheets and strips. In terms of environmental exposure, three beams were kept at room temperature and eight beams were subjected up to 300 wetting and drying cycles with deicing chemicals (3% NaCl). Following the exposure, the beams were tested to failure in four-point bending. In addition, nondestructive tests were performed to determine the corrosion rate, as well as destructive tests to determine chloride diffusion and reinforcing bar mass loss. Based on the findings of the study, the long-term effectiveness of the CFRP strengthened reinforced concrete in aggressive corrosive environments was established.
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Acknowledgments
The research was conducted with the financial assistance of Materials Manufacturing Ontario and the Natural Sciences and Engineering Research Council. The Carbodur system was donated by Sika Canada, and the Forca-Tow strengthening system was partially supported by ISIS Canada Network of Centres of Excellence. Thanks are extended to the technical staff at the Civil Engineering Department, University of Waterloo for their assistance during various stages of the work.
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© 2007 ASCE.
History
Received: Nov 25, 2002
Accepted: Dec 22, 2005
Published online: Jun 1, 2007
Published in print: Jun 2007
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