Bond performance of patching materials subjected to environmental effects

ABSTRACT

This study investigated the bond strength between concrete patching materials and fiber reinforced polymer (FRP) laminates used in the repair of impact damaged girders. Research was performed to understand how the FRP substrate-bond is affected by using different commercially available patching materials and environmental conditioning methods under sustained load. Variables included the selected patching material, the conditioning exposure and the level of sustained loading. Using the results an effective bond length for each material was obtained and an understanding of the overall bond strength was determined.