FRP–Concrete Bond after 12-Year Exposure in Tidal Waters
Publication: Journal of Composites for Construction
Volume 22, Issue 5
Abstract
The Friendship Trail Bridge linking St. Petersburg to Tampa, Florida, was demolished in 2016. This was the site of 13 fiber-reinforced polymers (FRP) repairs of corroding reinforced concrete piles undertaken in three separate demonstration studies completed in 2003–2004, 2006, and 2008. The repairs used carbon or glass fiber, wet layup or prepreg, and epoxy or polyurethane resins. Installation was by shrink wrap in the initial series and by pressure bagging in the next two. Residual FRP–concrete bond was evaluated in 2015–2016 through 120 pull-off tests conducted on 10 representative repaired piles. Results showed wide variation in the measured pull-off strength depending on the resin type, the number of FRP layers, the prevailing conditions at the time the epoxy was mixed, and how it was placed. Ambient conditions at installation influenced bond in epoxy-based systems. The highest residual bond was recorded in epoxy-based repair on piles that were installed by pressure bagging in 2008.
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Acknowledgments
The authors gratefully acknowledge the support of Nils Olsson, Karl King, and Thomas Capell, Hillsborough County, American Bridge Company, and Speedy Concrete, Tampa. Special thanks to USF graduate student Joseph Scott for his enormous contribution in the site visits.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 22 • Issue 5 • October 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: May 18, 2017
Accepted: Mar 26, 2018
Published online: Jul 4, 2018
Published in print: Oct 1, 2018
Discussion open until: Dec 4, 2018
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