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Comparative Study of Plastic Sand Block Containing LDPE with Conventional Concrete
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Researchers developed plastic sand blocks using low-density polyethylene (LDPE) waste mixed with sand at varying ratios and tested their structural performance against conventional concrete. An optimal plastic content range of 65–85% produced blocks with high compressive strength and no cracking, suggesting a viable eco-friendly alternative to concrete that also diverts plastic waste from landfills.
The durability of plastics, as well as their very stable molecular configuration, has posed a threat to mankind and nature since its invention. Getting these plastics recycled turns the garbage into gold. A well-designed, heavy-duty, durable plastic block thus comes to the rescue. However, as a result of less attention given to this field, the manufacturers have yet to come up with a plastic sand block that can be efficiently and effectively used in the housing industry. The said block will not only help reuse discarded plastics in a way that keeps them away from landfill sites for a considerable period of time but will also help minimize the carbon footprint level of the concrete industry.in addition to that, as a result of the universal availability of sand, the blocks thus curated will also be affordable and can be used globally. In this particular study, plastic sand blocks were forged in different ratios, and different kinds of strength tests were performed on them to check for their suitability in the housing industry. An optimum range of 65% to 85% of plastic content was deduced towards the later stage of the experiment, within which the said blocks showcased significantly high compressive strength in comparison to regular concrete with no sign of cracks or disintegration for a very considerable displacement value. This invariably results in a block wherein no compromise needs to be made with strength or workability to achieve a better, more suitable and eco-friendly alternative to concrete.
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Recycling Waste Plastics into Plastic-Bonded Sand Interlocking Blocks for Wall Construction in Developing Countries
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Researchers investigated the use of waste polyethylene mixed with sand to produce plastic-bonded interlocking blocks for wall construction in developing countries, reporting on production methods, mechanical properties including compressive strengths of approximately 15 MPa, and failure mechanisms of three block wall system designs. The plastic-bonded blocks outperformed conventional sandcrete blocks, demonstrating a viable pathway for recycling waste plastics into construction materials.
Plastic Waste-Based Paving Blocks: Towards A Sustainable Circular Construction Material
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Researchers tested four plastic-to-sand ratios for producing paving blocks from blended PET, PP, and LDPE waste, finding that a 75% plastic mix delivered the highest compressive strength at 11.64 MPa while pure plastic blocks offered the best water resistance and abrasion performance.
Eco-Friendly Pavement Innovation: Compressive Strength of Plastic–Sand Paver Blocks
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Researchers developed eco-friendly paving blocks using post-consumer PET, HDPE, and LDPE plastic waste combined with local sand in coastal Indonesia, finding that a 1:1 plastic-to-sand ratio achieved the highest compressive strength of 9.84 MPa, meeting Class D criteria suitable for garden paths and light pedestrian use.
Exploiting recycled plastic waste as an alternative binder for materials used in the construction industry
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This South African study investigated the feasibility of producing eco-friendly plastic-sand bricks from HDPE plastic waste and river sand, testing six sand-to-plastic ratios with Kaolin Clay DSF additions. Adding 5% Kaolin Clay significantly improved compressive strength from 21.4 MPa to 52.76 MPa in the 75:25 ratio, demonstrating that recycled plastic waste can serve as a viable construction material with improved mechanical and environmental properties.
Strength of Sand concrete Blocks Production Using Waste Plastic (Pet)
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Researchers found that mixing a small amount (5%) of shredded plastic waste into sand-based building blocks can produce strong, usable construction material while cutting costs and reducing plastic pollution. This matters because it offers a practical way to reuse plastic trash instead of it ending up in landfills, oceans, or breaking down into microplastics that can enter our water, food, and bodies. However, adding too much plastic weakened the blocks, so getting the ratio right is key to making this approach safe and effective for real-world building.
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