There are various method for evaluating the durability life of concrete structures due to salt damage . The best way is to perform a corrosion test for a rebar embedded in concrete specimen was exposure to marine environment. However, this method has the disadvantage that it takes a long period of time. Also, accelerated corrosion test which was complemented complements the time-consuming weakness is limited to apply because it could not reveal a correlation between long-term exposure test. Accordingly, the purpose of this study is to derive a correlation coefficient between cycle drying -wetting accelerated corrosion test and long-term exposure test. Corrosion initiation time was measured in four types of concrete samples, i.e., two samples mixed with fly ash(FA) and blast furnace slag(BS), and the other two samples having two water/cement ratio(W/C = 0.6, 0.35) without admixture(OPC 60 and OPC 35). The accelerated corrosion test was carried out by two case, i.e., one is a cyclic drying-wetting method(case 1), and the other is a artificial seawater ponding test method(case 2). Whether corrosion occurs, it was measures using half-cell potential method. The results indicated that case 1 is to accelerated the corrosion of rebar about 24~36% as compared with case 2, then the corrosion of rebar embedded in concrete occurred according to the order of OPC60, FA, BS, OPC35. Correlation coefficient between accelerated corrosion test and long-term exposure test, case 1 is 4.23 to 5.42, and case 2 is 6.54 to 7.82.

1. 서 론
 2. 실험계획 및 방법
  2.1 사용재료 및 배합특성
  2.2 실험방법
 3. 실험결과 및 분석
  3.1 촉진부식시험의 모니터링 결과
  3.3 염화물이온 침투저항성 시험결과
  3.4 장기폭로시험 결과 및 상관계수
 4. 결 론
 감사의 글
 References

• 박상순(상명대학교 건설시스템공학과 부교수) | Sang-Soon Park 교신저자