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Service life evaluation in RC structure near to sea shore through accelerated chloride diffusion test

촉진 염화물 시험결과를 이용한 비말대 콘크리트 구조물의 내구수명 평가

  • 김정수 (한화건설 기술연구소) ;
  • 권성준 (한남대학교 건설시스템공학과)
  • Received : 2018.12.21
  • Accepted : 2019.05.27
  • Published : 2019.09.01

Abstract

In order to evaluate service life of RC (Reinforced Concrete) structures exposed to chloride attack, chloride penetration analysis is required referred to the chloride diffusion coefficient from the actual mix proportions. In this work, accelerated diffusion coefficients are obtained from NT BUILD 492 and ASTM C 1202 and the related apparent diffusion coefficients are derived via the previously proposed relationship for RC structures near to sea shore. Considering the properties of the mix proportions and the most conservative analysis conditions like critical and surface chloride contents, service lifes in column and exterior wall member are evaluated through conventional program LIFE 365 ver.2. The different built-up period of 10 and 15 years has no significant effect on service life. The results from mix proportions with slag show longer than 75 years of service life with the help of higher time dependent parameter and lower initial diffusion coefficient.

Keywords

Chloride attack;Accelerated diffusion coefficient;Apparent diffusion coefficient;Service life

Acknowledgement

Supported by : (주)한화건설

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