The graphite conducts electricity the making of concrete and at connect a ground of application in the engineering

Asphalt concrete has been extensively applied in expressway and runway of airfield. It belongs electrical insulating material with a resistivitvy of 107-109Ω*m. The conductive behavior of asphalt mixture can be improved with the addition of conductive materials,thus a multifunctional Asphalt concrete can be obtained，which would have a profound effect on pavement deicing, damage testing and so on. Superpave design method was employed to design the mix Proportion of electrically conductive asphalt concrete. The curve of mix Proportion kept away from the restricted zone in order to provide enough voids in mineral aggregate to fill the high content of conductive materials. Conductive Powder can regard as a part of filler in asphalt concrete. But they need to make a conversion for equal quality of limestone powder because of the deference of the density. The conductive behavior of asphalt mixture can be improved by adding amorphous graphite and carbon fiber. The absorbing oil nature and lubricated effect of amorphous graphite and the bad dispersion of carbon fiber limit their application in ECAC respectively. The improving effete of graphite on the resistivity of ECAC is excellent，and the composite modification with other conductive materials also is obvious. amorphous graphite was used as main component，and a few carbon fibers were added as assistant component. carbon fibers replaced a part of limestone powder，which has an enforcement effete on asphalt concrete. The conductive performance of conductive Powder filling asphalt concrete is improved by adding a few chopped carbon fibers. Carbon fibers Play a role of the conductive bridge effect and the short circuit effect because of high long/diameter ratio，improving the conductive mechanism of electron.