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Title |
Evaluating Chloride Absorption of Reinforced Concrete Structures with Crack Widths
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Authors |
김건수(Kun-Soo Kim) ; 박기태(Ki-Tae Park) ; 김재환(Jaehwan Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2020.24.6.10 |
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Keywords |
염화물; 흡수; 철근 콘크리트; 이미지 분석 Chloride; Absorption; Reinforced concrete; Image processing |
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Abstract |
Deterioration of reinforced concrete structure caused by chloride ingress is the main issue and regrading this, many studies have been investigated with both experiments and computational modelling. In addition to chloride diffusion, chloride sorption should be considered as a chloride transport mechanism in concrete structure and cracks formed in concrete structures are the main variable to evaluate the performance of the structures. In this study, after making two types of cracks width (0.1 and 0.3 mm) in reinforced concretes, chloride absorption tests were performed. Weight change and colour change using 0.1 AgNO3 solution from the samples were performed to measure chloride ingress. Image processing was also carried out to quantify range of colour change in carck face. From the result, it were confirmed that the amount of chloride absorption increases with exposure time and increasing crack width, and chlorides reached at steel depth within 1 hour. It would be possible that chloride can move through interface bewteen steel and concrete, thereby further study regarding this is required.
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