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| Dynamic impact performance of steel fiber rubber self-compacting concrete after high temperature |
| ZHUANG Jinping1,2，REN Kai2，XU Ke2，CHEN jianxing3 |
| 1.Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering, Fujian University of Technology, Fuzhou 350118, China;
2.School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China;
3.College of Architecture and Environment, Sichuan University, Chengdu 610065, China |
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Abstract In order to explore the dynamic mechanical properties of steel fiber reinforced rubber self-compacting concrete (SFRSCC) after high temperature, the dynamic impact test of SFRSCC was carried out by using 80 mm diameter split Hopkinson pressure bar (SHPB). On the basis of determining the optimal content of steel fiber, the influence of rubber content on the fracture morphology, dynamic compressive strength, impact toughness and dynamic stress growth factor of SFRSCC after high temperature was mainly discussed. The test results show that, as the rubber content increases, the dynamic compressive strength of SFRSCC decreases gradually after high temperature cooling. On the contrary, the impact fracture resistance, impact toughness and dynamic increase factor of SFRSCC decreased with the increase of rubber content after high temperature cooling. The difference between the calculated values of the dynamic stress growth factor obtained by the test and the CEB-FIP recommended formula is compared, and the modified formula of the dynamic increase factor of SFRSCC after high temperature is proposed. The calculated values of the modified formula are in good agreement with the experimental results and the experimental results of other literatures, which can provide some reference for further analysis and discussion of the dynamic characteristics of SFRSCC after high temperature.
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Received: 23 September 2022
Published: 28 October 2023
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