Effect of reclaimed asphalt pavement on the binder rheological properties

Using Reclaimed Asphalt Pavement (RAP) not only economical but also better performance and also conserve the natural resources. To incorporate RAP in asphalt mix design, it is vital to know the amount and quality of the residual binder. The residual binders obtained from two RAP sources using solvent extraction and arson recovery methods were blended with a virgin binder in different proportions. Dynamic shear modulus, stiffness and viscosity of the different blends were compared. Viscosity and PG grading blending charts were developed based on the corresponding test data. It was concluded that the properties of the blends depend on the individual properties of the binders. The stiffness of the binder is increasing with increasing RAP binder. This research only address the binder related study so to quantify RAP in asphalt mix design the other factors like aggregate and volumetric properties need proper considerations.