Research on the influence of modifier content on asphalt performance

No. 35# bitumen was selected as matrix bitumen, and the designed dosage of SBS and TPS was added to modify the matrix asphalt with high viscosity. By detecting the dynamic viscosity at 60 °C, rotational viscosity at 170 °C, softening point, and 5 °C ductility, and analyzing the change law, it was found that when the SBS content was 5.5 %, the modification effect was obvious, but the comparison technical requirements index was still insufficient. The composite modification of matrix asphalt was carried out by mixing 5.5 % SBS with the designed dosage of TPS. The results showed that the modified asphalt prepared by blending 5.5 % SBS and 7 % TPS had the best performance indicators and met the technical requirements of high-viscosity modified asphalt.