Separation recycling technology for restoring reclaimed asphalt pavement

Abstract

Progress has been made in the diversification and repeated reuse of reclaimed asphalt pavement (RAP) in recent years. However, evaluating the quality of RAP containing polymer-modified asphalt (RAPm) has been difficult, and no method has been established for its reuse as hot mix asphalt. We have been developing recycling technology to restore RAP to the original condition of each material by separating it into aggregate and asphalt using hot water, and have succeeded in restoring aggregate from RAP containing straight (nonmodified) asphalt (RAPs). In this paper, we examine the recovery of aggregate from RAPm using hot water and the restoration of asphalt quality using high-temperature, high-pressure water. This technology can be applied to RAPm to rejuvenate asphalt.