Effects of Environmental Temperature and Humidity on the Electrical Properties of Carbon Fiber Graphite Cement Mortar

Abstract:

The paper researched the electrical properties of carbon fiber graphite cement-matrix composites(CFGCC) containing carbon fiber 0.5% (mass fraction of cement, the same below) and graphite powder 0%~30%, and the impact of environmental temperature(10~50°C) and relative humidity (20%~60%) to electrical properties of CFGCC by the four-probe method and KSON high and low temperature environmental chambers. The results have shown: the electrical resistivity of CFGCC decreases with increasing the content of graphite; the relationship curve of electrical resistivity and concentration of graphite exists percolation phenomena, the percolation threshold of CFGCC is about 25%; the electrical resistivity of CFGCC have decreased with increasing temperature; the variation rate of electrical resistivity have decreased with increasing the contents of graphite; the electrical resistivity have changed a little as the humidity changed, and the trend is towards smaller as a whole.

• Periodical: Advanced Materials Research (Volumes 143-144)
• Pages: 1022-1026
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.143-144.1022
• Online since: October 2010
• Authors: Xiao Ming Fan
• Keywords: Carbon Fiber Graphite Cement-Matrix Composite, Electrical Properties, Humidity, Temperature

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