摘要
为深入探究碳纳米管(CNTs)对混凝土不同受力阶段的增强效果,利用100 mm直径的分离式霍普金森压杆试验,研究冲击速度、CNTs含量等因素对混凝土韧性和抗冲击性能的影响。试验结果表明:CNTs的加入对水泥基材料的冲击性能有显著的改善作用,动态抗压强度、动态强度增大因子随冲击速度的增加而呈直线上升;在同一加载程度下,随CNTs含量的增大,水泥基材料的动态抗压强度先增大后减小,最大增幅可达23.7%;在混凝土中加入适量的CNTs,能够提高混凝土的整体强度、致密性,进而提高其动态力学性能。
To investigate the strengthening effect of carbon nanotubes(CNTs)on concrete at different stress stages,a 100 mm diameter split Hopkinson compression bar experiment was conducted to investigate the ef-fects of factors such as impact rate and CNTs content on the toughness and impact resistance of concrete.The experimental results show that the addition of CNTs significantly improves the impact performance of cement-based materials,and the dynamic compressive strength and dynamic strength increasing factor in-crease linearly with the increase of impact rate.At the same loading level,with the increase of CNTs con-tent,the dynamic compressive strength first increases and then decreases,with a maximum increase of 23.7%.Adding an appropriate amount of CNTs to concrete can improve its overall strength and density,thereby enhancing its dynamic mechanical properties.
作者
范宝宝
FAN Bao-bao(Beijing Huayu Engineering Co.,Ltd.,China Coal Technology and Engineering Group,Beijing 100120,China)
出处
《合成纤维》
CAS
2025年第1期86-90,共5页
Synthetic Fiber in China
关键词
碳纳米管
混凝土
霍普金森压杆
应力应变
动态强度
carbon nanotubes
concrete
Hopkinson strut
stress and strain
dynamic strength
