Research on Conductive Property of Carbon fiber/Carbon Black-filled Cement-based Composites
Electrical conductive carbon-modified cement-based composites are important multi-functional structural material.Double compounding carbon fiber and carbon black into cement-based material can improve the electrical conductive property of cement-based composites.In this paper,the influences of carbon fiber ratio and total volume fraction of carbon components on the resistivity of cement-based composites are investigated.The results show that both carbon fiber ratio and total volume fraction have great effect on the conductive behavior of carbon-modified cement-based material.At a fixed carbon fiber ratio,with the increase of total volume fraction,the resistivity of cement-based composites drops down dramatically and shows obvious percolation phenomenon.The reason is that with more and more conductive particles and fibers added into the cement material,the conductive components connect with each other gradually and at certain point reach the percolation threshold.At a fixed total volume fraction,the resistivity drops down with the increase of carbon fiber ratio.This is because that the carbon fiber has larger aspect ratio than carbon black,so carbon fiber could get lower resistivity with the same dosage according to the percolation theory.Finally,the results show that with 0.5 carbon fiber ratio and 2% total volume fraction the carbon-modified cement-based composites have relatively low resistivity,high workability and high compressive strength.
carbon fiber carbon black cement-based composites electrical resistivity
Yanting Du Ranran Zhao Jinqiu Dong
Tianjin Municipal Engineering Research Institute,Tianjin,300074,china Landscape Planning and Design Institute,Bureau of Parks and Woods,Tangshan,063000,China
国际会议
沈阳
英文
144-147
2012-09-07（万方平台首次上网日期，不代表论文的发表时间）