Performance Evaluation of Crushed PET Bottles in Highway Pavement Construction

Abstract

This study examines the modification of asphalt concrete using waste polyethylene terephthalate (PET) based crushed pet bottle. The Marshall test was performed on the samples after the optimum bitumen content of asphalt concrete was substituted with 2.5%, 5%, 7.5%, 10%, 12.5%, and 15%, of PET waste. When the unmodified and PET-modified asphalt concrete were compared, it became clear that the modified asphalt concrete improved stability and flow. At a PET waste percentage of 7.5%, the asphalt concrete modify with PET waste showed the highest stability. This suggests that adding PET waste could increase asphalt's resistance to permanent deformation, and also reduced the cost and maintenance of flexible pavement.