State of the Artreport on Maintenance Work of Road Bridges damaged by ASR

Abstract

Recent years, the examples that steel-bars in concrete pier and footing structures were breaking down by Alkali-silica Reaction (ASR) were reported. The mechanism that cause the breaking down of steel-bars is not mode clear. Also, there is a possibility that the load capacity of bridges may fall by remarkable ASR damage. Therefore, it is important that knowledge of the mechanism of breaking down of steel-bars and decrement of the load capacity of RC structures affected by ASR. This paper outlines the condition of road bridges damaged by ASR and basic policy of the maintenance works.