Bond Enhancement for FRP Pile Repair in Tidal Waters
Publication: Journal of Composites for Construction
Volume 12, Issue 3
Abstract
Vacuum bagging and pressure bagging are established techniques used by the composites industry for fabricating components. This paper describes a study that explored the adaptation of these techniques for improving the FRP-concrete bond in the repair of partially submerged piles. Prototype vacuum bagging and pressure bagging systems were developed and bond improvement assessed from results of pullout tests on full size piles repaired under simulated tide in the laboratory. Pressure bagging gave better bond and was found to be simpler because it did not require an airtight seal. A field demonstration project was conducted in which pressure bagging was used in combination with two different GFRP systems to repair two corroding piles supporting the Friendship Trails Bridge across Tampa Bay. Inspection of the postcured wrap showed no evidence of air voids. The study demonstrates that techniques developed by the composites industry may be readily adapted to provide effective and inexpensive means for improving FRP-concrete bond.
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Acknowledgments
This study was supported by Hillsborough County Public Works Department. The assistance and guidance of Mr. Nils Olsson, P.E. from Hillsborough County is gratefully acknowledged. The writers are indebted to Mr. Ed Fyfe, Fyfe & Co, LLC and Mr. Franz Worth, Air Logistics, for providing materials used in the testing. The writers also thank FDOT for their contribution.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 12 • Issue 3 • June 2008
Pages: 334 - 343
Copyright
© 2008 ASCE.
History
Received: May 14, 2007
Accepted: Aug 17, 2007
Published online: Jun 1, 2008
Published in print: Jun 2008
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