Study on Rheological property of SBS Modified Asphalt Mortar Combining Burgers Model

摘要

Rheological characteristics of bitumen can describe the resistance of bitumen to temperature variation and traffic loading well, which is linked to the in-service behavior of actual bituminous pavement. Modern theory of mortar denotes the study on rheological property of mortar is an important role to study asphalt system. This paper studies the rheological properties of base bitumen, SBS modified asphalt and SBS mortar using Dynamic Shear Rheometer (DSR). The results show that SBS has a better high and low temperature performance and fatigue property than base asphalt. The addition of filler improves high temperature performance of asphalt, but reduces low temperature performance and fatigue property. In addition, Second-order Burgers can well describe the viscoelastic property of SBS mortar.