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Cite as Citation reference for the source document. Tsala-Mbala, C.; Hayibo, K.S.; Meyer, T.K.; Couao-Zotti, N.; Cairns, P.; Pearce, J.M. Technical and Economic Viability of Distributed Recycling of Low-Density Polyethylene Water Sachets into Waste Composite Pavement Blocks. J. Compos. Sci. 2022, 6, 289. Academia OA, preprint

In many developing countries, plastic waste management is left to citizens. This usually results in landfilling or hazardous open-air burning, leading to emissions that are harmful to human health and the environment. An easy, profitable, and clean method of processing and transforming the waste into value is required. In this context, this study provides an open-source methodology to transform low-density polyethylene drinking water sachets, into pavement blocks by using a streamlined do-it-yourself approach that requires only modest capital. Two different materials, sand, and ashes are evaluated as additives in plastic composites and the mechanical strength of the resulting blocks are tested for different proportion mix of plastic, sand, and ash. The best composite had an elastic modulus of 169 MPa, a compressive strength of 29 MPa, and a water absorptivity of 2.2%. The composite pavers can be sold at 100% profit while employing workers at 1.5× the minimum wage. In the West African region, this technology has the potential to produce 19 million pavement tiles from 28,000 tons of plastic water sachets annually in Ghana, Nigeria, and Liberia. This can contribute to waste management in the region while generating a gross revenue of 2.85 billion XOF (4.33 million USD).


Keywords[edit | edit source]

composite; waste plastic; distributed recycling; LDPE; low density polyethylene; plastic sand composites; tensile strength; compressive strength; West Africa; economic development

Sand plastic composites[edit | edit source]


See also[edit source]

RepRapable Recyclebot and the Wild West of Recycling[edit source]


Recycling Technology[edit source]

Distributed Recycling LCA[edit source]

Literature Reviews[edit source]


Externals[edit source]

  • Economist article on U. of Washington's HDPE boat,
  • Another possible solution - reusable containers [1]
  • Commercial
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