SBS沥青胶浆的黏附性及混合料抗水损性能研究

分别制备不同SBS掺量和稳定剂掺量的SBS改性沥青胶浆和混合料，并通过BBS拉拔试验和冻融劈裂试验、汉堡车辙试验，系统研究了SBS改性沥青胶浆的黏附性及其混合料的抗水损性能，探究了两者之间的联系。研究表明：SBS的掺入增强和提升了沥青的黏附性和沥青胶浆的抗水敏感性；SBS改性沥青胶浆的黏附性及其混合料的抗水损性能均随着SBS掺量的增加而不断提升，均随着稳定剂掺量的增加先提升后下降，SBS掺量为4.5%的改性沥青最优稳定剂掺量为0.15%；冻融劈裂抗拉强度比TSR较损害变形速率MR能更好地反映沥青混合料对水的敏感性，冻融劈裂试验较汉堡车辙试验更适用于评价SBS改性沥青混合料的抗水损性能。

Study on Adhesiveness of SBS Asphalt Mortar and Water Loss Resistance of Mixture

The SBS modified asphalt mortar and mixture with the different SBS contents and stabilizer contents are prepared respectively. And the adhesiveness of SBS modified asphalt mortar and the water loss resistances of its mixture are systematically studied through BBS pull-out test, freeze-thaw splitting test and Hamburg rutting test to explore the relationship between the two. The study results show that the addition of SBS enhances and improve the adhesiveness of the asphalt and the water resistance sensitivity of the asphalt mortar. The adhesiveness and water loss resistance of SBS modified asphalt mortar are constantly improved with the increase of SBS content, and the both increase first and then decrease with the increase of stabilizer content. The optimal stabilizer content of the modified asphalt with SBS content of 4.5% is 0.15%. The freeze-thaw splitting tensile strength ratio TSR can better reflect the sensitivity of asphalt mixture to water than the damage deformation rate MR. The freeze-thaw splitting test is more suitable to evaluate the water loss resistance of SBS modified asphalt than Hamburg rutting test.