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Evaluation of asphalt mixtures modified with polyethylene terephthalate (PET)
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Researchers tested nine asphalt mixture formulations incorporating recycled PET plastic waste at varying binder and PET ratios, finding that a 3% binder with 8% PET combination produced optimal stability and stiffness while meeting standard mix design criteria, demonstrating a viable path for diverting PET waste into road construction.
Abstract Polyethylene terephthalate (PET) waste, ubiquitous in packaging and shipping industries, offers logistical advantages through its lightweight, durable nature, fostering cost-effective transportation. However, concerns over PET’s environmental impact arise from its persistence in ecosystems and contribution to pollution, urging industries to prioritize responsible waste management and recycling strategies. Recognizing the pivotal role of the construction industry, leveraging PET recycling in asphalt mixtures presents an applicable solution to curtail the environmental footprint of PET waste. Roadway asphalt construction, a significant industry, holds substantial potential to integrate PET waste into asphalt, offering a promising avenue for sustainable waste utilization. This research investigates the integration of PET waste into Egyptian asphalt mixtures across nine distinct compositions, varying binder percentages (3.0%, 3.50%, and 4%) and PET ratios (6%, 7%, and 8%). Marshall and Hamburg Wheel Rutting tests were conducted, comparing these formulations against a control mix devoid of PET. Notably, optimal outcomes emerged from the 3% binder with 8% PET combination, exhibiting enhanced mix stability and stiffness while meeting established mix design standards, signifying promising improvements in sustainability without compromising performance metrics.
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Plastic roads: evaluating the role of waste PET in hot mix asphalt – a review
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This review examined the mechanical, environmental, and economic impacts of incorporating waste PET into hot-mix asphalt, finding optimal performance at 4–6% PET dosage improving rutting resistance, durability, and flexibility. Life cycle assessment studies reported a 47.4% reduction in global warming potential, though long-term field data remain limited and regulatory and processing barriers hinder large-scale adoption.
Performance of recycled polyethylene terephthalate (pet) waste plastic modified bitumen in hot mix asphalt production
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Researchers evaluated recycled PET plastic waste as a bitumen modifier for hot mix asphalt, finding that PET addition improves rutting resistance and Marshall stability at optimal substitution levels, offering a dual benefit of road performance enhancement and plastic waste diversion from landfills.
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.
The use of polyethylene terephthalate waste as modifiers for bitumen systems
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Polyethylene terephthalate (PET) waste flakes were tested as a modifier for bitumen at various concentrations to improve road pavement performance. PET addition changed the rheological and mechanical properties of the bitumen, with certain concentrations improving resistance to deformation. Incorporating PET plastic waste into road materials offers a dual benefit of waste valorization and enhanced pavement durability.
The Use of Recycled Plastic in Asphalt Pavements: Feasibility Study
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A feasibility study found that incorporating recycled waste plastics into asphalt via a dry-process method improved rutting and moisture-damage resistance when aggregates were pre-heated to higher temperatures. Diverting waste plastics into road construction represents a promising strategy to reduce the volume of plastic waste that would otherwise degrade into environmental microplastics.
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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.