The hazards of plastic waste (PW) from polymers (e.g., polyethylene terephthalate (PET), high-density polyethylene (HDPE), low-density polyethylene (LDPE), polyvinyl chloride (PVC), nylon, polystyrene (PS), etc.), the mechanism of its spread in general, and its ubiquity in our daily lives as a continuously and/or frequently expelled product are a crisis of the twenty-first century, as reported by the United Nations in 2019, especially after the outbreak of the COVID-19 pandemic. This research included the process of modifying the rheological properties of asphalt to obtain asphalt suitable for use in a high-humidity atmosphere. The Iraqi climate is characterized by heat that reaches the point of harshness in the summer and coldness that falls below zero on some winter days. From this point of view, our recent study focuses mainly on making rheological and chemical modifications to asphalt using spent polymeric materials and used lubricating oils (ULO), thus achieving two important goals, namely obtaining asphalt with rheological properties resistant to the Iraqi atmosphere as well as eliminating both solid and liquid environmental pollutants. The microstructure and morphology of the designed patches were characterized using scanning electron microscopy (SEM) to indicate phase composition.

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The rheological modification of asphalt is currently the most important concern of workers in this field, whether a person is a chemist or a civil engineering worker. Several methods are used in rheological modulation processes. The rheological modification with polymeric materials is still the one that has taken the largest space in this field In this study, we dealt with the rheological modulation processes with polymeric mixtures. It used a mixture of materials that have proven effective in the field of rheological modulation and others that did not give the desired results. In this study, a mixture of a synthetic polymer, which is ethylpene vinyl acetate, and a natural polymer, which is wood, were used. Use this mixture with different weights of both polymers and for a total of 1 gram. The asphalt was treated with the above mixture with 1% by weight of sulfur at 180 ° C for a period of one hour The rheological properties of the modified samples were measured, which included measuring the ductility, penetration and softining point as well as calculating the penetration index coefficient and the percentage of the separated asphaltens. After that, the best sample obtained from the above treatment was taken and several interactions were conducted on it in order to determine each of: The optimum percentage of sulfur, The optimum temperature for modification process, The optimal time to perform the rheological modification processes, The effect of the addition process sequences on the properties of the axis asphalt was also studied. After that, the best sample obtained from this study was taken and was measured (Marshal, chemical immersion and as well as studying the effect of aging on this sample). The study gives good results in the field of asphalt resistance to the deformation processes that were carried out on it.