EFFECT OF HIGH DENSITY POLYETHYLENE PLASTIC WASTE ON THE MIX DESIGN PARAMETERS OF ASPHALT

Abstract

Asphalt mix design is a critical process that involves selecting the appropriate materials andproportions to create durable and high performing hot mix asphalt. Recently, there has beengrowing concern about the negative impact of plastic waste, prompting researchers to investigatethe feasibility of incorporating plastic waste into hot mix asphalt mixtures. This study was done toinvestigate the addition of High Density Polyethylene (HDPE) plastic waste to Hot Mix Asphaltfor Asphalt Mix Design. The Marshall properties of the asphalt mixture for both mixtures with andwithout HDPE was evaluated. Results showed that the Optimum Binder Content (OBC) was 6%for the conventional mixture or the mixture without plastic. The mixture containing HDPE plastichad higher stability and flow at 4 and 10% of the plastic content respectively and the voids in thetotal mixture decreased with increase in the plastic waste (HDPE) content.