Oxygen Permeability of FRP-Concrete Repair Systems
Publication: Journal of Composites for Construction
Volume 16, Issue 3
Abstract
Fiber reinforced polymers (FRP) are increasingly used for repairing corrosion-damaged concrete structures. The performance of the repairs is critically dependent on the oxygen permeability of the FRP-concrete system. This paper presents the results of an experimental study in which the oxygen permeation of concrete and FRP-concrete systems were determined. In the study, concrete specimens with three different water-cementitious ratios were initially tested. Subsequently, uni directional one and two-layer carbon and fiberglass material were bonded to the concrete surface, and the oxygen permeation of the FRP-concrete systems were determined. The results showed a significant reduction in the oxygen permeation of concrete after FRP had been bonded. The best performance was obtained for FRP bonded to concrete with the highest water-cementitious ratio. An expression for the equivalent thickness of FRP-concrete systems was derived by using Fick’s law. This facilitates the evaluation of the effectiveness of alternate FRP-concrete corrosion repair schemes.
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Acknowledgments
This material is based upon work supported by the National Science Foundation under Grant No. CMS-0409401. Matthew Durshimer helped with the experimental work.
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Information
Published In
Journal of Composites for Construction
Volume 16 • Issue 3 • June 2012
Pages: 277 - 285
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Apr 7, 2011
Accepted: Sep 21, 2011
Published online: Sep 23, 2011
Published in print: Jun 1, 2012
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