ABSTRACT
This study aims at exploring different methodologies to select the amount of two palm-oil based rejuvenators that allows maximizing the restored properties of recycled blends; that is, the blend of virgin binder, Reclaimed Asphalt Pavement (RAP) binder and rejuvenator. Three dosage selection methods based on Penetration, Softening Point and High Temperature Superpave Performance Grade (PGH) of the recycled blends in their unaged and aged states were evaluated. In addition, an approach based on the thermodynamic properties of the recycled blends was also explored. The dosage selection was determined as a function of the target virgin binder properties in unaged and aged conditions. The optimum palm-oil rejuvenator dose recommended corresponds to the average dose that restores penetration in unaged conditions and the PGH of the recycled blend.
