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<p>Plastic waste management remains a major challenge, requiring innovative recycling solutions. This study explores using polyethylene terephthalate (PET) and polyvinyl chloride (PVC) plastics as binding materials in paving blocks to mitigating plastic waste pollution. The study evaluates the suitability of these plastics in paving blocks by assessing their physical properties (density, water absorption, and compressive strength). The target was to determine optimal compositions for durable construction materials. Waste plastics were sourced from dumping sites and hotels in Tororo. Sand of 0.5&#xa0;mm and 1.2&#xa0;mm particle sizes was used as filler. Response Surface Methodology (RSM) optimized the physical properties of the moulded blocks and developed predictive models for performance enhancement. The study successfully developed predictive models for the density and water absorption of PET-based blocks. For PVCs, no viable water absorption model was established due to its ability to fill voids in the sand. Only PET combined with 1.2&#xa0;mm sand particles achieved a valid compressive strength model. The optimal composition was determined to be 148.28&#xa0;g of sand and 50.0&#xa0;g of PET plastic. With this mixture, blocks exhibited lower density, minimal water absorption, and high compressive strength, meeting the standards for durable construction materials. Therefore highlighting the potential of PET waste when combined with larger sand particles, to create cost-effective and environmentally friendly blocks. This study demonstrates a sustainable approach to repurposing plastic waste into valuable construction materials. Further research is recommended to assess the scalability, economic viability, and long-term durability of these paving blocks for broader applications.</p>

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Performance evaluation of the paving blocks moulded with plastic waste as a binding material

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年6月26日

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  • Ronald Henry Kibiina,
  • Saphina Biira,
  • Emirant Bertilas Amabayo,
  • Rashidah Akoba

摘要

Plastic waste management remains a major challenge, requiring innovative recycling solutions. This study explores using polyethylene terephthalate (PET) and polyvinyl chloride (PVC) plastics as binding materials in paving blocks to mitigating plastic waste pollution. The study evaluates the suitability of these plastics in paving blocks by assessing their physical properties (density, water absorption, and compressive strength). The target was to determine optimal compositions for durable construction materials. Waste plastics were sourced from dumping sites and hotels in Tororo. Sand of 0.5 mm and 1.2 mm particle sizes was used as filler. Response Surface Methodology (RSM) optimized the physical properties of the moulded blocks and developed predictive models for performance enhancement. The study successfully developed predictive models for the density and water absorption of PET-based blocks. For PVCs, no viable water absorption model was established due to its ability to fill voids in the sand. Only PET combined with 1.2 mm sand particles achieved a valid compressive strength model. The optimal composition was determined to be 148.28 g of sand and 50.0 g of PET plastic. With this mixture, blocks exhibited lower density, minimal water absorption, and high compressive strength, meeting the standards for durable construction materials. Therefore highlighting the potential of PET waste when combined with larger sand particles, to create cost-effective and environmentally friendly blocks. This study demonstrates a sustainable approach to repurposing plastic waste into valuable construction materials. Further research is recommended to assess the scalability, economic viability, and long-term durability of these paving blocks for broader applications.