High-viscosity asphalt additive and preparation method thereof

The invention discloses a high-viscosity asphalt additive and a preparation method thereof. The additive comprises the following raw material components in parts by weight: 100 parts of SBS, 3-10 parts of a stabilizer and a coating thereof, 20-45 parts of petroleum resin and 10-45 parts of aromatic oil, wherein the stabilizer is sulfur and polysulfide which can be selectively added, and the coating is urea resin. The high-viscosity modified asphalt additive can significantly improve the viscosity of asphalt, is convenient to use, can increase the adhesion between the asphalt and aggregate, effectively improves the water damage resistance of asphalt concrete, and the high-viscosity modified asphalt additive and asphalt have very good compatibility and uniform dispersibility with the asphalt. 本发明公开了一种高粘沥青添加剂及其制备方法。该添加剂按重量份计包括以下原料组分：SBS 100份，稳定剂及其包覆物3~10份，石油树脂20~45份，芳烃油10~45份；其中，稳定剂为硫磺及可选择性加入的多硫化物，所述包覆物为脲醛树脂。本发明高粘改性沥青添加剂可显著提高沥青的粘度，使用方便，同时可增加沥青与集料的粘附性，有效提高了沥青混凝土的抗水损害性能，而且添加剂与沥青具有非常好的相容性和均匀分散性。