The relationship between the SBS modifier types and asphalt components on the effect of modified asphalt properties was discussed in this paper. Higher block ratio, higher molecular weight and star-like structure of SBS can improve modified asphalt high temperature properties. Colloid content decrease leading the processing easier, result stability decline. Our research group invented a chemical titration combined with fluorescence microscopic analysis detection method monitoring SBS modifier dosage. This method applied in highway construction site, the effect is significant.

SBS modified asphalt has good performance of high temperature and low temperature, it is widely used in high-grade asphalt pavement engineering. But the aging will influence the using performance of asphalt, we select four dosages of modifier and aging for different time, Experimental results show that with the increase of aging time, asphalt penetration is reduced, softening point is elevated, ductility is decreased. According to the macro physical index analysis, find that SBS modified asphalt’s anti-aging performance is improved.