ABSTRACT
The application of asphalt rubber (AR) pavement has been increasing due to its superior performance, but a tailor-made recycling framework considering the special aging and rejuvenation mechanisms of AR binder is missing. In this study, three different rejuvenation schemes were proposed for the reclaimed asphalt rubber pavement (RARP) aiming at recovering the light components, supplementing the swelling rubber content, and both recovering and supplementing, respectively. The results of mechanical tests indicate that the supplementing of swelling rubber content is much more effective in improving the cracking and aging resistances of RARP-included mixture than the common rejuvenation method of adding rejuvenator. The life cycle analysis finds out that the recycling of RARP can significantly reduce greenhouse gas emissions (GHG) and cost mainly because of the saving of virgin bitumen and aggregates.
