小应力下碳纳米管/碳纤维水泥基材料压敏特性研究  

Research on Pressure-sensitive Properties of Carbon Nanotube-carbon Fiber/Cement Composites under Low Stress

作　　者：左俊卿[1] 

机构地区：[1]同济大学先进土木工程材料教育部重点实验室,上海201804

出　　处：《粉煤灰综合利用》2013年第2期12-15,共4页Fly Ash Comprehensive Utilization

基　　金：国家自然科学基金资助项目(50978200)

摘　　要：测试了碳纳米管/碳纤维水泥基材料的抗压强度,研究了其在小应力范围内循环载荷下电阻率的变化特性。结果表明,当碳纳米管掺量控制在0.2%到1.0%之间,碳纳米管其有利于增强水泥基材料抗压强度、线性度和可逆性,从而提高水泥基材料压敏性能。碳纳米管/碳纤维水泥基材料作为压力传感器用于车辆检测、动态称重计量和车速检测等工程实际有非常好的前景。In this work, compressive strength and pressure--sensitive properties o{ carbon nanotube--carbon fiber/cement compos- ites under low stress were tested. Results showed a CNTS 0.2%0 ~ 1.0% content at about is bereficial to mechanical property and pres- sure sensitivity of the cement . Test results indicated that the carbon nanotube-- carbon fiber/cement composites showed the potential stress sensors for vehicle detection, weigh--in--motion measurement and vehicle speed detection in traffic monitoring.

关 键 词：碳纳米管 碳纤维 水泥基材料 压敏特性 

分 类 号：U495[交通运输工程—交通运输规划与管理]