Influence of Water Content on Conductivity and Piezoresistivity of Cement-based Material with both Carbon Fiber and Carbon Black  

作　　者：韩宝国 欧进萍 

机构地区：[1]School of Civil Engineering,Harbin Institute of Technology [2]School of Civil and Hydraulic Engineering,Dalian University of Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2010年第1期147-151,共5页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China (No.50238040, 50538020);the Postdoctoral Science Foundation of China (No.20060390803);the High-Tech Research and Development Program of China (No. 2002AA335010)

摘　　要：The influence of water content on the conductivity and piezoresistivity of cement-based material with carbon fiber （CF） and carbon black （CB） was investigated. The piezoresistivity of cement-based material with both CF and CB was compared with that of cement-based material with CF only, and the changes in electrical resistivity of cement-based material with both CF and CB under static and loading conditions in different drying and soaking time were studied. It is found that the piezoresistivity of cement-based material with both CF and CB has better repeatability and linearity than that of cement-based material with CF only. The conductivity and the sensitivity of piezoresistive cement-based material with both CF and CB are enhanced as the water content in piezoresistive cement-based material increases.The influence of water content on the conductivity and piezoresistivity of cement-based material with carbon fiber （CF） and carbon black （CB） was investigated. The piezoresistivity of cement-based material with both CF and CB was compared with that of cement-based material with CF only, and the changes in electrical resistivity of cement-based material with both CF and CB under static and loading conditions in different drying and soaking time were studied. It is found that the piezoresistivity of cement-based material with both CF and CB has better repeatability and linearity than that of cement-based material with CF only. The conductivity and the sensitivity of piezoresistive cement-based material with both CF and CB are enhanced as the water content in piezoresistive cement-based material increases.

关 键 词：cement-based material carbon fiber carbon black water content CONDUCTIVITY PIEZORESISTIVITY 

分 类 号：TU52[建筑科学—建筑技术科学]