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Title |
Experimental Validation of Chloride Diffusion Model Considering Time-Dependent Changes in Surface Chloride Content under Different Exposure Conditions
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Authors |
권성준(Seung-Jun Kwon) ; 김형기(Hyeong-Ki Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2025.37.1.061 |
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Keywords |
염화물; 내구수명; 수치모델; 표면 염화물량; 내구성 설계 chloride; service life; numerical model; surface chloride content; durability design |
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Abstract |
Based on surface chloride measurements under diverse exposure conditions, a chloride diffusion model was evaluated. Concrete specimens made from Portland and blended cement, with varying water-to-binder ratios, were exposed to the atmospheric, tidal, and submerged zones of Korea’s Western coast for a period of six years. Surface chloride content and its profiles were measured annually over this period. A model was developed to account for the time-dependent variations in surface chloride content and was incorporated into a numerical chloride diffusion model. A comparison between the numerical model results and the actual chloride content at various depths suggests that durability design, using a reasonably proposed constant surface chloride content, can serve as an effective alternative without requiring time-dependent surface chloride adjustments.
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