The invention relates to an aggregate interface
enhancer used for
asphalt concrete and a preparation method thereof. The aggregate interface
enhancer is prepared from, by weight, 10-50% of an
elastomer, 30-50% of synthesized resin, 5-30% of fused oil, 0-0.5% of a color master batch, and 0.25-1.25% of an
antioxidant. The preparation method includes the steps of: 1) successively adding the
elastomer, the synthesized resin, the color master batch and the
antioxidant into a stirring
machine, stirring the materials, adding the fused oil, continuously stirring the materials uniformly, and allowing the mixture to stand for 24 h at normal temperature; 2) at 110-180 DEG C, uniformly mixing and melting the mixture through a spiral
machine, performing extrusive shaping, and cooling and
cutting the product to obtain a cylindrical granular product. Through the high-temperature melting, the aggregate interface
enhancer is high in
viscosity; when being mechanically stirred with heated aggregate, theenhancer is uniformly dispersed and has excellent combination property with the aggregate. The enhancer is suitable for rolling-type
asphalt concrete and pouring-type
asphalt concrete with enhanced aggregate interface, thereby improving durability of the
asphalt concrete.