Optimizing plastic waste inclusion in paver blocks: Balancing performance, environmental impact, and cost through LCA and economic analysis

• Published in: Journal of cleaner production 2024-11, Vol.478, p.143901, Article 143901
• Main Authors: Asif, Usama, Javed, Muhammad Faisal
• Format: Article
• Language: English
• Subjects: Economic analysis; Life cycle assessment; Paver blocks; Plastic waste
• ISSN: 0959-6526
• DOI: 10.1016/j.jclepro.2024.143901

Rising waste plastic and cement used in construction raises environmental concerns. Substituting cement with recycled plastic waste (PW) in paver blocks offers an eco-friendly solution. However, a comprehensive life cycle assessment (LCA) economic and performance analysis is lacking. This study addresses this gap by evaluating the compressive strength and durability properties of PSPB while also conducting LCA and economic evaluations to identify the most optimal solutions for enhanced performance. Compressive strength tests determined that a 30% PW replacement yielded optimal results. The durability tests showed that PW paver blocks have significantly lower water absorption compared to conventional blocks, and they maintained a compressive strength of 20 MPa, which is acceptable for light traffic applications, even at elevated temperatures. LCA highlights that cement usage accounts for over 80% of climate change emissions for conventional blocks. Sensitivity analysis shows shipping distance, truck capacity, and energy use greatly affect environmental outcomes. Complete replacement of cement with PW is considered more environmentally friendly. Economic analysis indicates plastic pavers are 52% more cost-effective than cement-based ones. This research offers vital insights into the practicality, environmental impact, and financial sustainability of integrating PW into paver blocks. [Display omitted] •Plastic waste (PW) to Paver blocks, a transformative waste reduction solution.•Optimal 30% PW in paver blocks excels in strength and eco-efficiency.•LCA reveals that plastic pavers produce considerably lower environmental emissions.•Economic analysis shows that plastic pavers are 52% cheaper than cement pavers.