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Evaluating Effectiveness of Multi-Component Waste Plastic Bags on Bitumen Properties: Physical, Rheological, and Aging
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Researchers characterized waste plastic bag samples dominated by low-density and linear low-density polyethylene and tested their performance as bitumen modifiers, finding they improved rutting resistance by one performance grade. The study evaluates a practical route for valorizing plastic waste in road construction materials.
This study examines the applicability of an unknown composition waste plastic bag sample as bitumen modifier. The waste components were initially characterized to identify the type of plastics and the level of impurity. Asphalt binder performance was examined for rutting, thermal, and age resistance. The results revealed that the waste plastic bags, predominantly consisted of Low-Density Polyethylene (LDPE) and Linear Low-Density Polyethylene (LLDPE) and contained 6.1% impurities. The binder tests indicated that the waste plastic bags enhanced the rutting resistance of bitumen by one grade, with its modification more similar to LLDPE, rather than LDPE. The thermal degradation and aging properties of the modified binders demonstrated that the bitumen modified by the waste plastic bags exhibited slightly lower resistance to temperature and aging compared to virgin LDPE and LLDPE. This was attributed to the impurities contained in the waste plastic. In conclusion, the analyzed waste plastic bags proved to be suitable for use in binder modification, presenting a viable alternative to virgin LLDPE.
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Utilizing waste polyethylene for improved properties of asphalt binders and mixtures: A review
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Researchers reviewed the performance effects of incorporating waste polyethylene into asphalt binders and road mixtures, finding that PE modification improves rutting resistance, durability, and fatigue life while offering a co-benefit of diverting plastic waste from landfill — though optimal dosage and blending method vary by PE form.
Experimental Study on Plastic Waste as an Additive in Bitumen
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Researchers blended plastic waste into bitumen at varying proportions and evaluated the modified mixture using standard road engineering tests, finding improvements in softening point and rutting resistance that suggest waste plastic can enhance pavement durability when incorporated at optimized concentrations.
Investigation of the rheological properties of low-density polyethylene (LDPE) modified bitumens using two plastic wastes
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Researchers modified road bitumen with low-density polyethylene (LDPE) plastic waste to improve its performance characteristics. The LDPE-modified bitumen showed improved rheological properties, demonstrating a practical use for plastic waste in road construction that could divert it from landfills and waterways.
Plastic Waste as a Modifier for Flexible Pavement Performance
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Researchers reviewed field and laboratory studies on plastic-modified bituminous pavements and found that incorporating HDPE and LDPE waste improves binding strength, thermal stability, water resistance, and road service life compared to conventional asphalt, offering a route to simultaneously manage plastic waste and reduce road maintenance costs.
Use of Waste Plastic as a Replacement for Bitumen in Road Construction
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This review examines methods for incorporating waste plastic into road construction as an alternative to virgin bitumen and aggregates. Techniques like plastic-coated aggregates and plastic-modified bitumen improved road durability and weather resistance while diverting plastic from landfills. The approach offers a dual benefit of reducing plastic waste accumulation and decreasing the environmental impact of road construction.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.