ABSTRACT
A state of the art process has been carried out to inform and improve the assessment and efficien cy of Reclaimed Asphalt (RA) containing Polymer Modified Bitumen (PMB) in multiple recycling of asphalt mixtures. The methodology developed included detailed laboratory investigation of the fundamental properties of RA containing PMBs and those of the binders recovered from various stages of sample manufacturing and after ageing processes. Laboratory manufactured asphalt mixtures were evaluated for stiffness, water sensitivity and deformation resistance. The key findings from this project show that asphalt mixtures produced using 50% PMB-RA have comparable mechanical properties to the mixtures containing 100% primary components (control). The recyclability assessment indicated that the desired rheological properties of the PMB were largely maintained after multiple recycling for asphalt mixtures incorporating highly polymer modified PMB. The findings from this work show the feasibility of improving sustainability by using high levels of RA with PMB.
