Steady shear viscosity of blends of fresh and RAP binders with rejuvenator: Experimental and estimated results

This paper focuses on the influence of the RAP-extracted binder and rejuvenator contents on the steady shear viscosity obtained as a linear viscoelastic property of different binder blends. One pure fresh 50/70 binder, a RAP-extracted binder and a rejuvenator of vegetal origin were mixed in different dosages. Steady shear viscosity ( η 0 ) values at different temperatures (from 25 °C to 85 °C) were determined from complex shear modulus results for all tested binders. In addition, η 0 ( T ) values of all binder blends were estimated from η 0 ( T ) values of base constituents by using two different approaches. Good correspondences with experimental results were found.