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Incorporating Waste Plastics into Pavement Materials: A Review of Opportunities, Risks, Environmental Implications, and Monitoring Strategies
Summary
This review examines the opportunities and risks of incorporating waste plastics into pavement construction materials, critically assessing performance benefits, environmental implications including microplastic release, and future directions for sustainable integration of plastic waste in road infrastructure.
The integration of waste plastics into pavement materials offers a dual benefit of enhancing road performance and mitigating the environmental burden of plastic waste. This review critically examines the opportunities and challenges associated with incorporating waste plastics in pavement construction, with an emphasis on their impact on the mechanical properties, durability, and life cycle performance of pavements. Special attention is given to the environmental implications, particularly the potential generation and release of micro- and nano-plastics during the pavement life cycle. This paper further evaluates current monitoring and analytical methodologies for detecting plastic emissions from road surfaces and explores emerging approaches for minimizing environmental risks. By providing a comprehensive synthesis of existing knowledge, this review seeks to support sustainable practices and inform policy development within the frameworks of circular economy and environmental stewardship.