In this study, the rahmen bridge damaged by the chloride attack was investigated. According to the investigation, the degraded concretes on cantilever kerb and end part were intensively observed. Thus, the chloride content test and half-cell method were performed to evaluate the degraded parts. As a result, the contents of chloride on degraded parts were C and D grade. On the other hand, the half-cell potential values of rebar in degraded concrete were measured with the minor corrosion. Thus, the freeze-thawing action due to deicing water is more influential than the expansion of rebar corrosion by chloride attack. Consequently, the economical repairs of degraded parts is more favorable than the replacement of the degraded parts. Also, it is necessary to inhibit the corrosion of rebar in concrete.

• 김일순(한국시설안전공단, 직원) | Kim, Il Sun 교신저자
• 김보헌(한국시설안전공단, 부장, 토목구조기술사) | Kim, Bo Heon
• 정수형(한국시설안전공단, 실장, 공학박사) | Jung, Soo Hyung
• 정지승(철도토목학과, 교수) | Chung, Jee Seung