Durability-Based Ranking of Typical Structural Repairs for Corrosion-Damaged Marine Piles: Fid-Bau Portal

Durability-Based Ranking of Typical Structural Repairs for Corrosion-Damaged Marine Piles

Reddy, D. V. / Bolivar, Juan C. / Sobhan, Khaled

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.