Abstract: The SBS modified asphalt blended with the EC130 warm mixture agent and the FRMAXTM flame retardant was tested by the dynamic shear rheometer (DSR), the curved beam rheometer (BBR) and the Brookfield to investigate the effects of two modifiers on the rheological properties of SBS modified asphalt. The results showed that the cooling effect of the EC130 warm mixture agent is obvious, which can effectively reduce the construction temperature of 25℃, however, it has an adverse effect on the low temperature rheological properties of the SBS modified asphalt, the low temperature PG classification drops to -12℃from -18℃; the FRMAXTM flame retardant can improve the high temperature deformation resistance of the SBS modified asphalt, the high temperature PG grade rises to 88℃ from 82℃, but has certain adverse influence on the low temperature rheological properties and the viscosity temperature performance, the low temperature PG grade drops to -12℃ from -18℃, the asphalt mixture construction temperature rises by 5℃. When the two added to the SBS modified asphalt together, the high temperature performance and the viscosity temperature performance are improved. The high temperature PG grade rises to 88℃ from 82℃, the construction temperature drops by 20℃, and the low temperature PG grade drops to -12℃ from -18℃.

Key words: EC130 warm mixture agent, FRMAXTM flame retardant, rheological property, viscosity temperature performance, PG classification