Low temperature Viscosity Determination of SBS Modified Asphalt with Dynamic Shear Rheometer Method

Abstract:

Based on the fundamental principle of Dynamic Shear Rheometer(DSR),the relationship between the complex shear modulus G*,phase angle δ and complex viscosity η*,dynamic viscosity η′ was established.Through the DSR tests of 7 types of SBS modified asphalts which are composed of one baseasphalt and 4 SBS polymers,the dosage and types effects of SBS on the dynamic viscosity η′ were discussed.The comparison of measured viscosity and estimated viscosity of η′=sin δ-4.862 8G*/ωat 60℃ shows that it is likely to get the lowtemperature viscosity of asphalt and modifiedasphalt with DSR method.