镀膜碳纤维用于智能水泥的探索  

Metal Coated Carbon Fibers Used as Intelligent Materials in Cement

作　　者：张晓新[1] 王伯羲[1] 

机构地区：[1]北京理工大学化工与材料学院,北京100081

出　　处：《北京理工大学学报》2002年第2期254-257,共4页Transactions of Beijing Institute of Technology

基　　金：兵总预研项目

摘　　要：研究了水泥中分别加入碳纤维和镀膜碳纤维所制成的导电复合材料在不同载荷下的导电性能 ,探索其用于智能水泥的可能性 .经过对含有不同短切长度和含量的碳纤维、镀膜碳纤维导电水泥试样进行测试和分析后发现 :碳纤维和镀膜碳纤维加入到水泥中制成的试样 ,其电阻随着压力和剪切载荷的变化呈现规律性的变化 ,其中镀膜碳纤维试样比碳纤维试样表现得更为敏感 ,并且都反映了试样受到压力后其内部裂纹的闭合和扩展情况 ,利用这种特性 。The electric conductivity of cement specimens with imbedded carbon fibers with or without metallic coating was studied under different pressures, and the possibility of such specimens being used as intelligenet cement was explored. Cement specimens containing carbon fibers and metal coated carbon fibers of different composition and length were made, tested and analyzed. The resistance of specimens was found to change regularly when subjected pressure. In particular, specimens with coated carbon fibers were found to be more sensitive than those with plain carbon fibers. This showed the effect of closure and opening of original cracks. With these characteristics, cement similarly imbedded is expected to be suitable for use as a kind of intelligent material.

关 键 词：镀膜碳纤维 智能水泥 导电性能 碳纤维 

分 类 号：TU528.582[建筑科学—建筑技术科学]