표면반발경도 활용 콘크리트 동해손상과 염분 침투 가속효과의 상관관계 분석

Abstract

Although most domestic concrete structures are simultaneously exposed to freeze-thaw and chloride environments, concrete durability inthe field is evaluated by each single action, and the evaluation of chloride-caused damage of concrete requires additional indoor experimental analysisof chloride contents by coring samples from structures in the field. However, in Korea, policies to strengthen facility maintenance, such as 「SpecialAct on the Safety Control and Maintenance of Establishments」 and 「Framework Act on Sustainable Infrastructure Management」, have been establishedand implemented since 2018 and facilities subject to safety inspection management by the government and local governments increases, the effectivesimplification technology for the inspection and diagnosis of concrete structure is needed. Therefore, this study attempted to evaluate the possibilityof determining the acceleration chloride penetration of freeze-thaw damaged concrete by using the surface rebound value. For this purpose, concretespecimens already having freeze-thaw damage by exposure to the freeze-thaw acceleration environment were immersed in chloride water. After that,the acceleration relationship of chloride penetration according to freeze-thaw damage was analyzed using the amount of chloride contents in concrete.