Abstract：This article analyses the factors affecting the electric flux of concrete from the perspective of concrete materials, the
main factor is water-cement ratio，but when the water-cement ratio drops to certain extent，the impact of fly ash is more ob原
vious. Fromthe microstructure analysis，the main material is the pore of mortar，including the gel pores and capillary porosity，
porosity，pore structure and pore connectivity. From the perspective of concrete mix proportion，when water reducer exists，
the mortar and aggregate volume ratio also affect the electric flux of concrete.