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Son, M., Kim, G., Lee, S., Kim, H., Nam, J., & Koichi Kobayashi. (2021). Synergistic effect of fiber blending ratio on the tensile properties of steel fiber hybrid reinforced cementitious composites under the different strain rates. Meterials, 14(6), 4504 | |||||
작성자 | 건설재료시공학연구실 | ||||
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조회수 | 164 | 등록일 | 2022.03.23 | ||
주저자 | Minjae Son | ||||
교신저자 | |||||
공동저자 | Gyuyong Kim, Sangkyu Lee, Hongseop Kim, Jeongsoo Nam, Koichi Kobayashi | ||||
학술지명 | Meterials | ||||
AbstractIn this study, a high-performance hybrid fiber-reinforced cementitious composite (HP-HFRCC) was prepared, by mixing hooked steel fiber (HSF) and smooth steel fiber (SSF) at different blending ratios, to evaluate the synergistic effect of the blending ratio between HSF and SSF and the strain rate on the tensile properties of HP-HFRCC. The experimental results showed that the micro- and macrocrack control capacities of HP-HFRCC varied depending on the blending ratio and strain rate, and the requirement for deriving the appropriate blending ratio was confirmed. Among the HP-HFRCC specimens, the specimen mixed with HSF 1.0 vol.% and SSF 1.0 vol.% (H1.0S1.0) exhibited a significant increase in the synergistic effect on the tensile properties at the high strain rate, as SSF controlled the microcracks and HSF controlled the macrocracks. Consequently, it exhibited the highest strain rate sensitivities of tensile strength, strain capacity, and peak toughness among the specimens evaluated in this study. |