The curve of mix proportion kept away from the restricted zone in order to provide enough voids in mineral aggregate ( vma ) to fill the high content of conductive materials . conductive powder can regard as a part of filler in asphalt concrete 导电沥青混凝土的级配设计采用superpave设计方法，合成曲线尽可能远离禁区，提供足够的矿料间隙率来填充高掺量的导电相材料。
