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Influence of Reinforcements on the Chloride Diffusion Analysis of Concrete Structures

철근의 영향을 고려한 콘크리트 구조물의 염소이온 확산해석

  • 오병환 (서울대학교 토목공학과) ;
  • 장봉석 (한국건자재시험연구원) ;
  • 이명규 (전주대학교 토목환경공학과)
  • Published : 2002.12.01

Abstract

The chloride penetration in concrete structures is influenced by many factors such as types of cement and admixture proportion. Therefore, the effects of these factors on chloride diffusion must be correctly considered. The conventional diffusion analysis also neglected the existence of reinforcing bar in concrete structures. The purpose of the present paper is therefore to investigate the effect of reinforcing bar on the chloride diffusion in concrete structures. For this purpose, a comprehensive finite element analyses have been conducted to obtain chloride penetration profile. The results indicate that the chlorides are accumulated in front of a reinforcing bar and that the accumulation is much larger for the case of large diameter bars. The higher accumulation of chloride at bar location causes much faster corrosion of reinforcing steel. It can be concluded from the present study that the effects of reinforcing bars must be considered in chloride diffusion analysis for more realistic prediction of durable life of concrete structures.

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