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Evaluation Of Strength Characteristics Of Flexible Pavement Layers Modified With Plastic Waste
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This study assessed the use of plastic waste as a modifier for soil and bitumen in flexible road pavement construction in India, finding that incorporating plastic waste improved material performance while offering a circular economy solution to plastic pollution that has been applied to road construction since 2001.
Plastics became a part of every day lives due to low cost, durability, and functionality. The non-biodegradable nature of plastics is a menace to the environment and decades of efforts to effectively recycle plastics have been unrewarding since repeated recycling deteriorates the quality of plastic and the cost of collection, sorting, cleaning and recycling exceeds the cost of virgin plastic in developed countries whereas the developing countries lack infrastructure and awareness needed for effective recycling of plastic waste (PW). Significant research has established that un-treated PW is entering the food chain of marine species and can potentially enter the human food chain as well. Disposal of PW in land fill has a threat of leeching of harmful chemicals into the environment and adverse effect on ground water recharge whereas incineration releases significant amount of greenhouse gases making PW disposal an unfeasible solution. The situation demands a circular economic approach to upcycling PW. Since the year 2001 PW is used in India for road construction, this has helped in creating circular economy to upcycle plastic waste and making roads sustainable. India alone aims to construct 34,800 km of national highways by 2026, projects of this magnitude will consume enormous amount of soil, aggregate and bitumen. This paper examines the performance of PW modified soil and bitumen to assess the suitability of PW modified roads as an effective, economical and sustainable alternative for flexible pavement construction.
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Plastic Waste as a Modifier for Flexible Pavement Performance
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Researchers review field and laboratory evidence showing that incorporating HDPE and LDPE plastic waste as a bitumen modifier in flexible road pavements improves binding strength, heat resistance, and water resistance while extending service life and reducing maintenance costs compared to conventional asphalt construction.
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.
Experimental Study on Waste Plastic Modified Bituminous Mix for Flexible Pavements
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Researchers found that mixing shredded waste plastic (like grocery bags and packaging film) into road paving material makes roads stronger and more durable while also giving discarded plastic a useful second life instead of it ending up in landfills or waterways. This matters because it tackles two problems at once—plastic pollution and road quality—though it's worth noting the study didn't examine whether the plastic in these roads breaks down into microplastics over time or affects nearby air, soil, or water as roads wear down from traffic and weather.
Study of Characteristics of Bitumen and Aggregate with Use of Plastic Waste
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This study investigated the use of plastic waste as a modifier in road construction materials—bitumen and aggregate—finding that increasing plastic content reduced bitumen penetration and ductility while increasing softening point, making it better suited for warmer climates. Adding plastic to aggregate reduced both abrasion and impact values, enhancing toughness for road applications and offering a practical strategy for managing plastic waste through infrastructure development.
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.