The use of waste in the production of asphalt binders and mixtures has gained popularity due to significant economic and environmental advantages. The aim of the work was to assess the impact of various methods of introducing polyethylene terephthalate (PET) flakes and high-density polyethylene (HDPE) flakes/granules on the physical and mechanical properties of asphalt concrete. According to the analysis of literature sources, a decision was made on several modification options: replacing 3% of the screenings with PET flakes, adding PET flakes more than 3% by weight, replacing 0.5% of bitumen with PET flakes, HDPE flakes/granules. The basic physical and mechanical properties, as well as the coefficient of long-term water resistance for all compositions, were experimentally determined and compared with the requirements of DSTU 8959:2019.
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