A study on mechanical properties of asphaltic concrete improved with crosslinked thermoplastic elastomer

Abstract

This research focuses on enhancing the mechanical properties of asphalt concrete using thermoplastic elastomers made from plastic waste and natural rubber through a crosslinking process. As previous studies have identified limitations in material compatibility during the binder mixing process, this research proposes a method to improve the compatibility between these two polymeric materials through crosslinking, creating thermoplastic elastomers that can blend effectively with asphalt cement for use as a binding material. Performance was evaluated through laboratory testing of stability, flow, and indirect tensile strength of asphalt concrete samples prepared using the Marshall method. This study examined asphalt cement replacement rates with thermoplastic elastomers at 3%, 5%, and 7%, while maintaining a constant binder-to-aggregate ratio of 5%. Results indicate that asphalt cement modified with crosslinked thermoplastic elastomers significantly improves the mechanical properties of asphalt concrete and meets the standards established by the Department of Highways.