Waste Polymer and Lubricating Oil Used as Asphalt Rheological Modifiers

Abstract

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.

Effects of HDPE Utilization and Addition of Wetfix-Be to Asphalt Pavement in Tropical Climates

“…The density value is a volume weight that shows the dense value of the asphalt concrete mixture is thicker [13]. It is influenced by compaction temperature, constituent materials, filler substance, compaction energy, and asphalt substance.…”

Study of the Effect of Modification of Asphalt on the Rheological Properties Employing Microwave Radiation—An Aging Study

“…Asphalt is a thermoplastic material and keeps its condition very well. At normal temperatures, asphalt is a liquid or semi-solid material with a high viscosity and works as an excellent insulator from water that is not affected by any factors such as salts or even acids [1][2][3][4]. It can be black or dark brown in color.…”

Sustainable development goals for industry, innovation, and infrastructure: demolition waste incorporated with nanoplastic waste enhanced the physicomechanical properties of white cement paste composites

“…Particularly, in the last 5 years, the usage of plastic in food packing and PPE has hugely increased. Thus, with an increase in the production of plastic factories, the volume increases and the PW cannot be stored or recycled in the conventional ways (e.g., landfilling and/or burning) (Owaid et al 2022 ; Osial et al 2022 ; Salih et al 2022 ). In 2025, the production of plastic waste may reach 21 BT (Ncube et al 2021 ; Hahladakis et al 2020 ).…”