Mechanical properties of ceramic fiber-reinforced concrete under quasi-static and dynamic compression |
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| Affiliation: | 1. Department of Airfield and Building Engineering, Air Force Engineering University Aeronautics and Astronautics Engineering College, Xi’an 710038, China;2. College of Mechanics and Civil Architecture, Northwest Polytechnic University, Xi’an 710072, China;1. Mechanical Engineering Department, College of Engineering, King Saud University, Riyadh, Saudi Arabia;2. LMPM, Department of Mechanical Engineering, University of Sidi Bel Abbes, BP 89, Cité Ben M’hidi, Sidi Bel Abbes, Algeria;1. School of Civil Engineering, Tianjin University, Tianjin 300072, China;2. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;3. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;1. State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, PLA Army Engineering University, Nanjing 210007, China;2. Research Institute of Structural Engineering and Disaster Reduction, College of Civil Engineering, Tongji University, Shanghai 200092, China;3. State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Research Institute of Building Science, Nanjing 210001, China;1. School of Civil Engineering, Central South University, Changsha, Hunan 410075, China;2. Zhuhai Honghe Bridge Co., Ltd., Zhuhai, Guangdong 519000, China |
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| Abstract: | The research herein is made on the quasi-static and dynamic mechanical properties of ceramic fiber reinforced concrete (CRFRC for short) through the adoption of a hydraulically-driven testing system as well as a 100-mm-diameter split Hopkinson pressure bar (SHPB) system. As test results have turned out, such quasi-static properties as compressive strength, splitting tensile strength and flexural strength of CRFRC increase with the rise in the volume fraction of fiber. Within the strain range of 20–120 s−1, the effect of the axial strain acceleration on the dynamic strength of CRFRC could be ignored. Therefore, the dynamic increase ratio (DIF) derived from SHPB tests can truly reflect the dynamic enhancement of CRFRC. The dynamic strength, critical strain and specific energy absorption (SEA) of CRFRC are sensitive to the strain rate. The addition of ceramic fiber to plain concrete can significantly improve its properties—dynamic strength, critical strain and energy absorption. And also, an analysis is conducted of the mechanism for strengthening and toughening the concrete. |
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| Keywords: | Ceramic fiber Split Hopkinson pressure bar Strain rate Axial strain acceleration Specific energy absorption |
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