期刊
MATERIALS
卷 12, 期 23, 页码 -出版社
MDPI
DOI: 10.3390/ma12234000
关键词
coral concrete; carbon fibers; impact resistance; drop-weight impact test; Weibull distribution
类别
资金
- National Natural Science Foundation of China [51868005, 51478126]
- Guangxi Natural Science Foundation Program [2018GXNSFAA050133]
- College Students Innovation and Entrepreneurship Training Program of Guangxi University [201910593161]
- Innovation Project of Guangxi Graduate Education
In this study, the impact resistance of coral concrete with different carbon fiber (CF) dosages subjected to drop-weight impact test was investigated. For this purpose, three concrete strength grades (C20, C30, C40) and six CF dosages (0.0%, 0.3%, 0.6%, 1.0%, 1.5%, and 2.0% by weight of the binder) were considered, and a total of 18 groups of carbon fibers reinforced coral concrete (CFRCC) were cast. For each group, eight specimens were tested following the drop-weight impact test suggested by CECS 13. Then, the two-parameter Weibull distribution theory was adopted to statistically analyze the variations in experimental results. The results indicated that the addition of CFs could transform the failure pattern from obvious brittleness to relatively good ductility and improve the impact resistance of coral concrete. Moreover, the impact resistance of CFRCC increases with the CF dosage increasing. The statistical analysis showed that the probability distribution of the blow numbers at the initial crack and final failure of CFRCC approximately follows the two-parameter Weibull distribution.
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