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An Experimental Study on Performance of HDPE Plastic in Concrete Boundary Wall
Summary
Researchers found that mixing recycled plastic waste (HDPE, the type used in milk jugs and detergent bottles) into concrete for boundary walls can actually make it stronger, with the best results coming from adding about 5% plastic by weight. This matters because it offers a practical way to reuse plastic waste instead of sending it to landfills or letting it break down into microplastics that pollute soil and water—turning a pollution problem into a useful building material.
This study examined HDPE (high-density polyethylene) plastic waste as an added material for concrete Boundary wall. The selection of HDPE was based on its increased strength, hardness, and resistance to high temperatures compared with other plastics. It focused on how HDPE plastic can be used as an additive in concrete to increase its tensile strength and compressive strength. 156 specimens were used to identify the effect of adding different percentages and sizes of HDPE lamellar particles to lower, medium, and higher strength concrete for non-structural applications. HDPE 0.5 mm thick lamellar particles were added at 2.5%, 5%, 10%, and 20% by weight of cement. The results showed that the medium concrete class (with compressive strength equal to 10 MPa) had the best response to the addition of HDPE. The 5% HDPE addition represented the optimal mix for all concrete types. In the pursuit of sustainable construction practices, the integration of recycled materials into concrete production emerges as a pivotal strategy. This research delves into the integration of recycled High-Density Polyethylene (HDPE) plastic aggregates into concrete mixes, with the aim of bolstering both the mechanical properties and ecological sustainability of concrete structures. The study meticulously examines the compressive, tensile, and flexural strengths, along with Young's Modulus of Elasticity, of concrete specimens incorporating recycled HDPE plastic aggregates. Notably, a water-to-cement (w/c) ratio of 0.25 was employed in the concrete mix formulation, optimizing the material's performance. The plastic aggregates utilized in this study were meticulously prepared, comprising 50% recycled HDPE plastic and 50% sand, resulting in a balanced 1:1 ratio for the first type, while the second type featured a 1:2 ratio. Through rigorous experimentation and analysis, the findings elucidate the transformative potential of recycled HDPE plastic aggregates in reshaping conventional concrete production paradigms. This research underscores the viability of recycled HDPE plastic aggregates as a sustainable.