ABSTRACT
ABSTRACT Concrete structures that are capable of performing safely for long periods are integral to the achievement of a sustainable society. The steel components of steel and concrete composite girder bridges often undergo corrosion when they are subjected to long periods of salt exposure. The purpose of this study is to investigate high-strength fly-ash (FA) concrete's resistance to salt penetration. A saltwater immersion test was conducted to achieve this purpose, using cylindrical specimens of FA concrete. A salinity penetration analysis was also carried out to determine the relationship between salt damage and the depth of the concrete on composite girder bridges. The results confirmed that high-strength concrete's resistance to salt penetration is improved by adding FA. Furthermore, the comparison of several test cases also confirmed that the start year for steel bar corrosion would be extended by more than ten years if FA were added.
