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Title |
Probabilistic Assessment of the Possibility of Steel Corrosion According to Initial Chloride Content of Concrete
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Authors |
전상민(Sang-Min Jeon) ; 정철우(Chul-Woo Chung) ; 김지현(Ji-Hyun Kim) ; 권성준(Seung-Jun Kwon) ; 장승엽(SeungYup Jang) ; 김형기(Hyeong-Ki Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2025.37.5.543 |
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Keywords |
초기염화물; 내구성; 콘크리트; 철근부식; 확률론적 해석 initial chloride content; durability; concrete; corrosion; probabilistic analysis |
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Abstract |
In this study, the appropriateness of the current domestic limit for initial chloride content in concrete was evaluated by assessing the probability of reinforcement corrosion using a probabilistic approach. The fib Model Code 2010 was utilized as the analytical framework. To ensure reasonable input parameters?such as mix proportions, exposure conditions, and cover depth?relevant statistical data and standards were thoroughly reviewed. The probability of reinforcement corrosion was then evaluated under various design conditions, with the initial chloride content per unit binder ranging from 0.01% to 0.2% across different mix proportion scenarios. The results indicated that, for structures exposed to external chloride ingress, higher allowable initial chloride content can significantly influence design outcomes. However, for structures located in environments where external chloride ingress is not a concern, the current domestic limit of 0.3 kg/m3 is relatively conservative compared to international standards. From a theoretical perspective, based on the distribution of initial chloride content in the fib Model Code 2010, it was found that increasing the initial chloride content up to 0.2 wt.%/binder?equivalent to the minimum threshold in EN 206:2013?still provides an adequate safety margin.
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