南通市以往生产的沥青混合料,不掺石灰、石粉,而仅仅依靠粗骨料中微量的矿粉,其含量很微量且不稳定,因此,混合料的级配很难达到规范级配曲线的要求。成型后沥青混凝土空隙率偏大,密实度偏小。因此,往往采用掺配一定量(10～20％)的黄砂,使沥青混凝土能 Nantong asphalt mixture produced in the past, without mixing lime, stone powder, and only rely on a small amount of coarse aggregate in the slag, its content is very small and unstable, therefore, the grading of the mixture is difficult to achieve the standard grading curve Claim. Asphalt after forming the porosity is too large, less dense. Therefore, often mixed with a certain amount of (10 ~ 20%) of the yellow sand, so that asphalt concrete can