纤维增强混凝土导电性能的研究与应用  

Studies on the electrical conductivity of carbon fiber reinforced concrete and its applications

作　　者：陈兵[1] 吴科如[2] 姚武[2] 

机构地区：[1]上海交通大学建筑工程与力学学院,上海200240 [2]同济大学混凝土材料研究国家重点实验室,上海200092

出　　处：《混凝土》2002年第7期23-26,22,共5页Concrete

摘　　要：纤维增强混凝土的导电行为作为一个新的研究方向日渐成为研究热点。本文研究了碳纤维增强水泥混凝土的电导性能 ,讨论了纤维掺量和纤维长度对导电性能的影响 ,并通过扫描电镜观察 ,探讨体系导电行为与体系内碳纤维渗流结构关系。另外还研究了体系在三点弯曲负荷下 ,电阻相对变化与荷载挠度曲线对应关系。研究结果表明 ,碳纤维增强水泥混凝土材料结构中存在电导渗流现象 ,能够作为本征机敏材料反应试件受载时的应力应变关系。Study of electrical conductivity of carbon fiber reinforced concrete has becoming the hot research topic because of the potential applications.In the paper,electrical resistivity of carbon fiber reinforced concrete was measured and emphasis was discussed on the dependence of system resistance on the volume fraction and length of carbon fiber.The microstructure associated with electrical percolation phenomena was also observed.Additional,the change of electrical resistance for system under three-point-bending test was also studied.It is show that it exist percolation phenomena in the carbon fiber reinforced concrete and smart behavior during loading.

关 键 词：导电性能 纤维增强混凝土 碳纤维 电阻率 机敏材料 

分 类 号：TU528.572[建筑科学—建筑技术科学]