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Title |
Effect of Corrosion Level and Crack Width on the Bond-Slip Behavior at the Interface between Concrete and Corroded Steel Rebar
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Authors |
조상현(Sang-Hyeon Jo) ; 기성훈(Seong-Hoon Kee) ; 이정재(Jung-Jae Yee) ; 이창계(Changkye Lee) |
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DOI |
https://doi.org/10.11112/jksmi.2023.27.1.54 |
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Keywords |
부식; 균열; 부착강도; 슬립거동; 철근 콘크리트 계면 Corrosion; Crack; Bond strength; Slip behavior; Rebar-concrete surface |
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Abstract |
In this paper, the effect of corrosion level and crack width on the cohesive strength-slip behavior of corroded steel rebar and concrete interfaceis conducted. The existing studies mainly focus on the decrease in bond strength with respect to the level of corrosion; there are, however, few studieson the decrease in cohesive strength according to the crack width of the concrete surface due to corrosion. Therefore, in this study, a series of testsfor the cohesive strength, slip behavior and mass loss of the reinforcing bar is evaluated at the surface of corroded rebar and concrete. It is found thatthe tendency to decrease the bond strength is closely related to the crack width rather than the corrosion level. Hence, to determine the degradationperformance for the bond strength-slip behavior relation, the occurrence of cracks on the concrete surface can be a suitable index.
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