표면피복재 및 단면수복재로 보수된 콘크리트의 동결융해 저항성과 염화물 침투 특성에 관한 연구

Abstract

Reinforced concrete is one of the most popular material in the construction industry. However, its durability decreased by rebar corrosion which generates crack of structure. To recover durability of structure, it is removed and refilled with finishing material that the area damaged by chloride ion. But, studies are insufficient in spite of necessity of the study about penetration in concrete with finishing material. Therefore, in this study, calculated diffusion coefficient finishing material and patching repaired concrete by RCPT(Rapid Chloride Penetration Test), and predicted about sustenance life from chloride ion penetration after freezing-thawing by Finite Element Method(FEM). Compare with no finishing species, it figured out 42%, 72% diffusion coefficient reduction in case of concrete with finishing species, section repaired species. And freezing and thawing cycle increases, chloride ion diffusion increased. Finite element analysis result, sustenance life of concrete established 48 years, surface finishing established 50 years, than concrete 48 years, section restoration material established more than 100 years.