콘크리트 종류에 따른 매립철근의 부식 임계염화물량 평가에 관한 실험적 연구

Abstract

The method of lowering the diffusion coefficient of concrete are widely used by mixing blast furnace slag(BFS) and fly ash(FA) in order to prevent the steel corrosion. In this study, the NaCl solution was supplied and the potential of the reinforced steel was monitored to measure the critical chloride contents of the reinforced concrete according to the type of concrete. In case of using BFS and FA, it showed that the corrosion of the steel was progressed rapidly, which is considered to be related to the decrease of the pH of the concrete.