Proceedings of the Korea Concrete Institute Conference (한국콘크리트학회:학술대회논문집)

Korea Concrete Institute (한국콘크리트학회)
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A Study on the Chloride Ion Diffusion Coefficient of Concrete by Submergence in Salt Water

침적시험에 의한 콘크리트의 염소이온 확산계수 평가

  • 김동석 (쌍용양회공업㈜ 기술연구소 콘크리트연구실) ;
  • 양승규 (쌍용양회공업㈜ 기술연구소 콘크리트연구실) ;
  • 정연식 (쌍용양회공업㈜ 기술연구소 콘크리트연구실) ;
  • 유재상 (쌍용양회공업㈜ 기술연구소 콘크리트연구실) ;
  • 이종열 (쌍용양회공업㈜ 기술연구소) ;
  • 본간건일 (태평양시멘트㈜ 중앙연구소 제1연구부 시멘트기술그룹)
  • Published : 2003.11.01
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Abstract

A chloride is an important deteriorating factor which governs the durability of the reinforced-concrete structures under marine environments. Also, the main penetration mechanism of chloride ion into concrete is a diffusion phenomenon. In this study, It is evaluated the diffusion coefficient of chloride ion in non-steady state by Fick's second law. Submergence method in salt water carried out in this experiment. Two types of cement which is different in mineral composition were used. In addition, the effect of mineral admixtures of blast-furnace slag and meta-kaolin was studied. In conclusion, the diffusion coefficient of chloride ion is much affected according to cement type and mineral admixtures, also, it is proved that meta-kaolin as well as blast-furnace slag is effective in preventing penetration of chloride ion.

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