碳纤维水泥基复合材料正、负压敏性与含水量的相关性研究  

Correlation Studies between Pressure Sensitivity Properties and Moisture Content of Carbon Fiber Reinforced Cement-based Composites

作　　者：王玉林[1] 赵晓华[2] 兰四清[1] 

机构地区：[1]武夷学院土水工程与建筑学院,武夷山354300 [2]汕头大学工学院土木工程系,汕头515063

出　　处：《硅酸盐通报》2014年第6期1341-1346,共6页Bulletin of the Chinese Ceramic Society

基　　金：福建省自然科学基金项目(2012J05096);福建南平市科技项目(N2010Z10(9));武夷学院青年项目(Xq201018);福建省大学生创新项目(Sj201210397737)

摘　　要：对碳纤维水泥基复合材料进行多次烘干逐次减少材料的含水量,测定各次失水后相应的压敏性,研究含水量变化对材料压敏性的影响,结果表明:碳纤维水泥基复合材料在不同含水量情况下,压敏性表现形式不同,即当含水量较高时材料表现为"正压敏性";失去一定量水后转变为"负压敏性";当持续失水使含水量很低或者达到理想干燥状态时材料最终表现为"正压敏性"。值得注意的是,碳纤维水泥基复合材料在正、负压敏性发生转变过程中,在一定含水量条件下,存在正、负压敏性共存的过渡状态。Pressure sensitivity properties of carbon fiber reinforced cement-based composites are tested respectively soon after composites being dried in oven every time, to study how moisture content effects on pressure sensitivity properties. Results show that： pressure sensitivity properties of composites present different forms with change of moisture content, that is, pressure sensitivity will be positive when high moisture content, converted into negative form when loss of a certain content of moisture, and finally be positive form when composites are very dry or in state of absolute desiccation. It is worth mentioning that there exists transition state that positive and negative pressure sensitivities coexists in the transformation process of pressure sensitivities.

关 键 词：碳纤维水泥基复合材料 压敏性 含水量 无损检测 智能材料 

分 类 号：TU528[建筑科学—建筑技术科学]