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Title |
Flexural Behavior of Textile-Reinforced Mortar Members according to the Manufacturing Methods of Grid-Type Carbon-Fiber Composites
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Authors |
김경민(Kyung-Min Kim) ; 박성우(Sung-Woo Park) |
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DOI |
https://doi.org/10.4334/JKCI.2024.36.6.665 |
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Keywords |
탄소그리드; 인장보강재; 휨거동; 직물섬유보강콘크리트; 탄소섬유보강재료 carbon grid; reinforcement; flexural behavior; textile reinforced mortar; carbon fiber reinforced polymer |
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Abstract |
This study experimentally evaluated the flexural behavior of mortar specimens reinforced with grid-type carbon-fiber?reinforced polymer (CFRP), hereafter referred to as carbon grids. The experimental variables included the cross-sectional area and spacing of CFRP strands, constituting the carbon grids manufactured using different methods. The results showed that specimens with larger cross-sectional areas of longitudinal CFRP strands exhibited relatively poorer bond properties between the carbon grid and the mortar. All specimens reached flexural failure due to mortar crushing at the compressive edge, and it was found that the higher the tensile force of the longitudinal CFRP strand, the higher the flexural strength. The coefficient of efficiency for flexural strength of the specimens ranged from 0.24 to 0.35, indicating similar tensile performance across the samples. The behavior after reaching flexural strength varied depending on the extent of damage to the mortar and longitudinal CFRP strands. Specifically, the carbon-grid?reinforced mortar specimens with a cross-laminated structure failed in a brittle manner, while those with a biaxial warp knitting structure failed in a more ductile manner. It was also considered to be advantageous for flexural behavior to arrange smaller cross-sectional areas of CFRP strands at narrower spacings in the case of similar tensile forces of the longitudinal CFRP strands.
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