Abstract:Laboratory test was utilized to evaluate the effect of the proportion of rock asphalt and SBS on the performance of Terminal Blend asphalt (TB asphalt). Based on the fluorescence microscopy and the surface energy test, the enhancement effect and strengthening mechanism of rock asphalt and SBS on TB asphalt were investigated. The results show that both rock asphalt and SBS can improve the high temperature property of TB asphalt without affecting its outstanding low temperature performance notably. The grade of TB blended with 20%(by mass, the same as below)rock asphalt and 20% crumb rubber can reach PG 7628. Besides, the rutting test results indicate that the high temperature performance of TB/rock asphalt (10% rock asphalt+10% crumb rubber) compounded with 2%(by mass)SBS is better than that of 45% SBS modified asphalt (PG 7622), which means a remarkable reduction of the use level of SBS and thus the production cost. The results by the surface energy test and TSR show that the adhesion of TB asphalt shows increase at first and then decrease with the increase of rock asphalt and SBS content, and rock asphalt and SBS can generally improve the adhesion of TB asphalt. The observed results of fluorescence microscopy further confirm that SBS and TB/rock compound asphalt is homogeneous and stabilized internally.