The use of waste plastic is seen as a means of enhancing the visco-elastic behaviour of the binder used in hot-mixed asphalt, as well as providing significant environment benefits in reducing the quantity of plastic pollution. This initiative has drawn wide attention as it not only utilises recycled waste plastic but has been shown to improve the properties of the asphalt. The trials were constructed in two sections, one using a stone skeletal SMA mix type and the other a high modulus EME mix. The performance of the two trial sections was assessed on two occasions, a year apart, and included detailed visual assessments as well as assessments of riding quality, rut depth, and texture. The structural performance was also assessed using deflection based mechanistic analyses. Both trials have performed well to date under the large percentage of heavy vehicles transporting material to and from a nearby asphalt plant, rock quarry and Ready mix facility. It is intended to continue monitoring the trial to assess both short and long-term performance of this innovative product. Using waste plastic in asphalt is seen as a cost-effective and environmentally friendly way of reducing the quantity of waste plastic that would otherwise require disposal at landfill sites; the intention of this paper is to share the technology used to produce the waste plastic modified asphalt as well as to present the performance that can be expected from the product.
Asphalt Modified with Recycled Waste Plastic in South Africa Encouraging Results of Trial Section Performance
Sustain. Civil Infrastruct.
International Road Federation World Meeting & Exhibition ; 2021 ; Dubai, United Arab Emirates November 07, 2021 - November 10, 2021
2022-04-21
11 pages
Article/Chapter (Book)
Electronic Resource
English
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