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.

Abstract
 1. 서 론
 2. 실험개요 및 방법
 3. 실험결과 및 고찰
 4. 결 론
 참고문헌

• 박장현(한양대학교 일반대학원 건축시스템공학과) | Park, Jang Hyun
• 이한승(한양대학교 ERICA 건축학부) | Lee, Han Seung 교신저자