Research on Polyphosphoric Acid and SBS Compounding and Blending No.90 Grade A Road Petroleum Asphalt
Due to No.90 asphalt has poor performance at high temperature,low temperature and aging performance.In this paper,No.90 asphalt was used as the basic raw material,and No.90 asphalt was blen-ded by adding polyphosphoric acid,SBS modifier or polyphosphoric acid and SBS compound modification,and the indexes such as penetration,ductility,dynamic viscosity and performance after aging were analyzed.The results show that the indexes of No.90 asphalt blended by polyphosphoric acid and SBS compound modifica-tion mode fully meet the requirements of No.90 A-grade road petroleum asphalt standard in JTG F40-2004 road petroleum asphalt.The effects of storage temperature and time on the properties of asphalt were investiga-ted,which provided a new idea for improving the quality of matrix asphalt.
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