Evaluation of Asphalt Binder and Mixture Properties by Incorporation of Waste Plastics

The improper disposal of waste materials, such as plastics, presents a severe environmental problem. However, an innovative approach to address this issue involves incorporating these waste products into asphalt. This not only improves the characteristics of the asphalt binder but also offers an efficient and responsible method for disposing of these materials. The purpose of this study is to investigate the effects of adding different amounts of polyethylene terephthalate and low-density polyethylene to a 60/70 penetration grade bitumen. Several tests were performed to determine the performance of modified asphalt binder. Binder adhesion and moisture resistance were evaluated using rolling bottle test and pneumatic adhesion tensile test. Comprehensive laboratory test results showed that the binder modified with low-density polyethylene and the control binder both had lower adhesion and moisture resistance compared to the binder containing 12 percent polyethylene terephthalate. This finding suggests that incorporating polyethylene terephthalate into asphalt binder enhances its adhesive properties and makes it more resilient against moisture. Not only does this innovative approach address the environmental issue of improper waste disposal, but it also improves the overall performance of asphalt. By effectively utilizing waste materials, such as polyethylene terephthalate, in the production of asphalt, contribute to a more sustainable and eco-friendly infrastructure.