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Abstract
Rejuvenator content needed for recycling reclaimed asphalt pavement (RAP) is now mostly determined by considering the penetration or viscosity criterion of the blend of aged asphalt with added rejuvenator. In the study, a comprehensive approach stressing the performance-related properties of the blend, is attempted for determining the rejuvenator content according to strategic highway research program (SHRP) binder specifications. To this end, a series of dynamic shear rheometer and bending beam rheometer tests were carried out on the blends in three states and different temperatures of different aged asphalts with various rejuvenator contents. It is clearly indicated that the performance-related properties of the blends at three different temperatures specified by SHRP binder specifications were effectively changed with rejuvenator content, and the relationships between the properties and rejuvenator content were quite linear. Rejuvenator content needed for recycling RAP is thus able to be reasonably determined when all the requirements specified by SHRP binder system at the three temperatures are satisfied.
