Corrosion damage is a main cause of deterioration for concrete marine structures.
Given the current economic downturn, governments, maintenance agencies, and
private organizations, have restricted funding for replacement of structures. It has
become increasingly important to rehabilitate structures, and develop repair
techniques that prolong their life-cycles. Several factors affect the identification of
suitable repairs, such as the variety of materials available, the lack of a consistent
methodology to predict the outcome of the repairs, and the location of the damage
relative to the tide. This investigation compares the performance of recognized
repair techniques, in terms of corrosion resistance, structural integrity, and costeffectiveness.
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-tocorrosion- threshold, and visual inspections. The structural integrity was evaluated
by crack scoring and ultimate load testing. Following a cost analysis, a
comprehensive evaluation matrix was prepared to determine the repairs that
provided the best alternatives for repairs. The repairs comprising carbon wrapping,
HDPE jacketing, and MMFX steel outperformed the others, i.e. SIFCON repair,
styrene-butadiene grout with woven roving fabric wrapping, normal concrete repair
with spliced FRP (Glass) reinforcement, and the modified ASANO refresh method.