Abstract: In order to solve the problem of poor compatibility difficulty in modification of Chunfeng vacuum residue with SBS,the composition of Chunfeng vacuum residueand Tahe vacuum residue was complementary,and the method of compounding first and modifying later was adopted. The compatibility between Chunfeng vacuum residue and SBS was improved, and the modification difficulty of Chunfeng vacuum residue was reduced. The compatibility difference between the two kinds of residue was analyzed in detail fromthe aspects of element composition, structural parameters and group composition. Finally, using Chunfeng and preferred Tahe vacuum residue as raw materials, the process conditions were optimized by uniform design test method. SBS modified asphalt with storage stability and performance meeting theI-B and I-Cspecifications of “Technical Requirements of Polymer Modified Asphalt” was preparedby selecting appropriate process conditions.

Key words: Chunfeng vacuum residue, Tahe vacuum residue, compatibility, complementarity, SBS modified asphalt