碳纤维水泥基材料压阻效应研究  

Study on piezoresistivity of carbon fiber reinforced cement based composite

作　　者：姚武[1] 陈兵[2] 吴科如[1] 

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

出　　处：《河南科学》2002年第6期630-633,共4页Henan Science

基　　金：上海市科技发展基金资助项目(0 1QE14 0 5 2 );国家自然科学基金资助项目 (5 990 80 0 7)

摘　　要：本文研究了掺有碳纤维的水泥基复合材料的导电机理和在轴向压力下的压阻特性。结果表明 :碳纤维水泥基复合材料的导电性有较显著的压力依赖性。在低应力水平下电阻随压力增加而降低 ,在较高应力水平下则随应力增大而升高 ,呈现所谓的“电阻负压力系数 (NPCR)和正压力系数 (PPCR)”效应。The conductive mechanism and piezoresistivity of carbon fiber reinforced cement based composite (CFRC) were studied. The results showed that there exists a remarkable pressure dependence on the conductivity of CFRC, in which the so-called negative pressure coefficient of resistivity (NPCR) and positive pressure coefficient of resistivity (PPCR) were observed under low and high stress ratios, respectively. The breakdown and rebuild-up process of conductive network under pressure were found to be responsible for the pressure dependence on resistivity.

关 键 词：碳纤维水泥基材料 压阻效应 水泥基复合材料 导电机理 轴向压力 

分 类 号：TU528.582[建筑科学—建筑技术科学]