Steel corrosion is a major concern for the long-term durability of reinforced concrete bridges subject to marine exposures. To provide a basis for selecting corrosion control measures for such structures, it is advantageous to evaluate the performance of previously implemented corrosion control measures after extended service. An evaluation of bridge substructures was recently performed in Florida, USA comparing uncoated carbon steel to epoxy-coated rebar (ECR) and the use of fly ash in concrete mix designs and concrete coatings. The barrier provided by ECR can extend the time to initial concrete degradation caused by corrosion and the use of fly ash and surface coatings can beneficially affect chloride transport parameters including diffusivity and surface concentration.
