Performance of CFRP-Strengthened Concrete Beams after Exposure to Wet/Dry Cycles
Publication: Journal of Composites for Construction
Volume 22, Issue 6
Abstract
This paper reports on the effect of exposure to cycles of wetting and drying in fresh and salt water on the performance of carbon fiber-reinforced polymer (CFRP)-bonded concrete beams. The test program included 3, 8, and 12 months of exposure of normal and high-strength concrete specimens strengthened with one and two layers of CFRP reinforcement. The results indicated that the exposure caused a reduction in the tensile strength and modulus of elasticity of the epoxy adhesive. The ultimate loads of the small-beam specimens were not significantly affected by the exposure owing to the redistribution of shear stress along the CFRP plates. The degradation of the CFRP-concrete interface, however, decreased the bond strength and fracture energy of CFRP strengthening systems in the small-beam test, especially in the one-layer high-strength concrete configuration. Insights on bond characteristics and failure mechanisms of CFRP-strengthened concrete under the tested exposure conditions are presented.
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Acknowledgments
This work was financially supported by Kasetsart University Research and Development Institute (KURDI). Support and assistance provided by Sika (Thailand) Ltd. are also acknowledged.
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Published In
Journal of Composites for Construction
Volume 22 • Issue 6 • December 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jan 18, 2018
Accepted: Jun 12, 2018
Published online: Sep 18, 2018
Published in print: Dec 1, 2018
Discussion open until: Feb 18, 2019
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