摘要
针对混杂纤维橡胶混凝土(HFRC)设计了正交试验,对其力学性能进行测试并与普通混凝土对比,分析了玄武岩纤维体积率、聚丙烯纤维体积率和橡胶体积率对HFRC抗压、劈裂抗拉和抗折强度的影响。结果表明:当玄武岩纤维体积率为0.3%、聚丙烯纤维体积率为0.2%、橡胶体积率为5%时,HFRC各项性能表现最佳。玄武岩纤维对HFRC,强度的影响程度最大,掺入混杂纤维HFRC,强度有较大幅度提升,体现了良好的纤维“正混杂效应”,随着橡胶体积率增加,HFRC强度逐渐降低。借助SEM微观分析了纤维在HFRC中的桥接增强作用,对HFRC增韧阻裂机制进行了讨论,最后对HFRC强度进行了模型预测。
Orthogonal experiments were designed for hybrid fiber rubber concrete(HFRC),and its mechanical properties were tested and compared with ordinary concrete.The volume ratio of basalt fiber,polypropylene fiber and rubber volume ratio were analyzed for the impact of HFRC's compression and splitting strength.The results show that when the volume ratio of basalt fiber is 0.3%,the volume ratio of polypropylene fiber is 0.2%,and the volume ratio of rubber is 5%,the performance of HFRC is the best.Basalt fiber has an impact on the strength of HFRC and the strength of HFRC mixed with hybrid fiber has been greatly improved,which reflects a good fiber"positive hybrid effect".As the volume rate of rubber increases,the strength of HFRC gradually decreases.With the help of SEM microscopic analysis,the mechanism of fiber toughening and crack resistance of HFRC was discussed,and finally the strength of HFRC was modeled.
作者
朱鹏宇
万后林
朱叶
顾文虎
ZHU Peng-yu;WAN Hou-lin;ZHU Ye;GU Wen-hu(Faculty of Architecture and Civil Engineering,Huaiyin Institute of Technology,Huaian 223000,China;Jiangsu Dongchen Building Materials Co.,Ltd.,Huaian 223000,China)
出处
《复合材料科学与工程》
CAS
北大核心
2021年第12期73-77,共5页
Composites Science and Engineering
基金
江苏省自然科学基金(BK20160426)。
