Durability-Based Ranking of Typical Structural Repairs for Corrosion-Damaged Marine Piles
Publication: Practice Periodical on Structural Design and Construction
Volume 18, Issue 4
Abstract
Corrosion damage is a main cause of deterioration for concrete marine structures. It has become increasingly important to rehabilitate structures and develop repair techniques that prolong their life cycles. This investigation compares the performance of recognized repair techniques, in terms of corrosion resistance, structural integrity, and cost-effectiveness. Eight sets of three cylindrical piles were prepared to conduct seven types of repairs with one control set. Following initial exposure to corrosion, the specimens were repaired using the proposed techniques and tested for durability under simulated tidal conditions, with corrosion monitoring, determination of time-to-corrosion threshold, and visual inspections. The structural integrity was determined by crack scoring and ultimate load testing, and synthesized with a cost-effectiveness evaluation to rank the repair techniques. The repairs comprising carbon wrapping, high-density polyethylene (HDPE) jacketing, and MMFX steel outperformed the others, slurry-infiltrated fibrous concrete (SIFCON) repair, styrene-butadiene grout with woven roving fabric wrapping, normal concrete repair with spliced fiberglass reinforcing plastic (FRP) (glass) reinforcement, and the modified ASANO refresh method.
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Acknowledgments
The authors thank the National Science Foundation for financial support of the project titled “Cost-Effective Repair of Marine Piles,” on which this paper is based, under the U.S.–Mexico International Cooperative Program. Gratitude is expressed to Structural Preservation Systems, Inc., for providing technical expertise, staff help with the repair work, and assistance with materials; SRI Consultants, Inc., for their technical support and assistance with the corrosion equipment rental, and Dr. Salem Faza of MMFX Steel Corp. for the donation of MMFX steel. Florida Waterproofing Supplies, W.R. Grace & Co., and Sika Corporation are also gratefully acknowledged for their contributions of repair materials.
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© 2013 American Society of Civil Engineers.
History
Received: Jan 30, 2012
Accepted: Nov 16, 2012
Published online: Nov 20, 2012
Published in print: Nov 1, 2013
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