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Study on the Rheological Properties of Recycled Plastic and Waste Cooking Oil Composite Modified Asphalt
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This study examines how adding recycled plastic and rubber materials to asphalt changes its flow and deformation behavior under stress and temperature variation. Rheological testing reveals how these waste-derived modifiers affect pavement performance characteristics such as rutting resistance and thermal stability. The results support the use of recycled materials in road construction as both a sustainability strategy and a potential performance enhancer.
To enhance the overall performance of asphalt pavements and promote the efficient utilization of solid waste resources, this study innovatively incorporates recycled polyethylene (PE) particles and recycled ethylene-vinyl acetate copolymer (EVA) particles, each compounded with waste cooking oil (WCO), to modify base asphalt. Systematic tests were conducted to evaluate the physical and rheological properties of the composite modified asphalt. Additionally, Fourier transform infrared spectroscopy (FTIR) and thin-layer chromatography with flame ionization detection (TLC-FID) were used to analyze the microstructures and internal components of the modified asphalt. The results indicate that the optimal mixing ratio for the WPA is 5% WCO, 5% EVA, and 5% PE. With the incorporation of these modified materials, the asphalt's high-temperature and low-temperature properties, as well as its rutting and fatigue resistance, are enhanced to some extent. Furthermore, the modification significantly improves the rheological properties of the asphalt across the full temperature range. Additionally, the modified materials lead to changes in the internal composition of the asphalt: the content of lighter components decreases, while the content of heavier components increases. These changes in the internal composition are the primary cause of the observed improvements in the rheological properties of the asphalt.
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Impacts of the Co-Pyrolytic Product from Waste Cooking Oil (WCO) and Polypropylene (PP) on Physical and Rheological Properties of Bitumen
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Co-pyrolysis of waste cooking oil and polypropylene (1:2 ratio) yielded a product that, when added to neat bitumen, modified its physical and rheological properties as characterized by DSC, FTIR, DSR, and BBR testing. This approach offers a dual benefit of valorizing two waste streams—waste plastic and cooking oil—to enhance bitumen performance for road construction.
Performance Evaluation of Post-Consumer and Post-Industrial Recycled Plastics as Binder Modifier in Asphalt Mixes
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This study evaluated post-industrial low-density polyethylene and post-consumer commingled polyethylene/polypropylene as bitumen modifiers for asphalt, finding that while higher plastic content improved cracking and rutting resistance, it also reduced storage stability and moisture resistance, with performance outcomes varying by plastic type and concentration.
Recent Advances in Polymer-Modified and Plastic-Reinforced Asphalt: A Comprehensive Review of Performance, Rheology, and Sustainability
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Researchers reviewed recent developments in polymer-modified and plastic-reinforced asphalt systems, synthesising findings on performance enhancement, rheological behaviour, and sustainability implications of incorporating recycled plastics and polymer modifiers into asphalt binders and mixtures.
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.
Rheological Characterization of Industrial Waste Modified Bitumen
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This study evaluated the rheological and physical properties of bitumen modified with polypropylene (PP) industrial waste at concentrations from 0% to 20% by weight, using conventional tests (softening point, penetration, ductility, flash and fire point) and dynamic shear rheometer analysis. PP addition was found to improve key performance characteristics of the asphalt binder, including rutting resistance at higher temperatures. The results support PP waste as a viable bitumen modifier, offering a potential use pathway for polypropylene plastic waste in road pavement applications.
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