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Title |
Study on Improving the Bond Strength of CFRP Rebar Through Application of Silane Coupling Agent
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Authors |
염우성(Woo-Sung Yum) ; 권도영(Do-Young Kwon) ; 추용식(Yong-Sik Chu) |
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DOI |
https://doi.org/10.11112/jksmi.2024.28.6.56 |
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Keywords |
탄소 섬유 보강근; 인장 강도; 실란 커플링제; 부착 강도; 유리섬유; 탄소섬유 CFRP rebar; Tensile strength; Silane coupling agent; Bond strength; Glass fiber; Carbon fiber |
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Abstract |
In this study, various types of silane coupling agents were applied to enhance the bond strength of the glass fiber, which functions as ribs on the surface of carbon fiber reinforced polymer (CFRP) rebars, and the resulting changes in physical properties were investigated. Using glass fiber composites, the optimal composition ratio of silane coupling agents was derived. Subsequently, CFRP rebars with a diameter of 10 mm were fabricated, and tensile strength, elastic modulus, and bond strength with concrete were tested. Initially, based on experimental results regarding the presence or absence of sizing on glass fibers and the type of silane coupling agent, the GS-3TPM sample exhibited the highest improvement rate, making it the optimal composition. The CFRP rebars manufactured with GS-3TPM showed approximately 5% higher tensile strength and elastic modulus compared to conventional CFRP rebars, and the bond strength with concrete improved by about 20%. This study confirmed that the application of silane coupling agents effectively enhances the bond strength between CFRP rebars and concrete.
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