Abstract
The properties of various blends of a fresh binder (50/70 penetration grade) and a RAP-extracted binder, with and without a rejuvenator, were studied. A mixture of vegetal oils was used as rejuvenator in different dosages. A total of 17 binders were tested, including pure fresh and RAP binders. Conventional tests were performed in order to determine penetration at 25 °C, softening point (TR&B), Fraass breaking point (TFraass), ductility (elongation at 25 °C) and density at 25 °C. The steady-shear viscosity (η0) of all binders was calculated from complex modulus test results. Two different approaches were proposed in order to estimate values of penetration, TR&B, TFraass and η0 of blends from properties of base constituents. Excellent correspondences with experimental results were observed.
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