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The Effect of 0.8% Polyethylene Terephthalate Plastic Waste Substitution on the Flexural Strength on K-175 Concrete
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Researchers investigated substituting 0.8% polyethylene terephthalate plastic fiber waste as a partial replacement for fine aggregate in concrete, finding that PET-modified concrete achieved a 4.32% higher flexural strength compared to standard K-175 concrete.
The use of plastics in daily life continues to increase in a variety of uses. One of the most commonly used plastic that is difficult to decompose is Polyethylene Terephthalate (PET) plastic. In recent years, such as the construction industry, has been trying to reuse the waste as construction material. Therefore, this research aims to contribute by exploring the effect of PET plastic fiber substitution as fine aggregate on the flexural strength of concrete. PET plastic fibers were used at 0.8% as partial replacement of fine aggregates and then chopped to a size of 5 cm long, 1-3 mm wide. The test results indicate that concrete containing 0.8% PET plastic fiber as a substitution of fine aggregate has a higher flexural strength value of 4.32% which is better than normal concrete. Therefore, using recycled PET fiber in concrete is needed as an eco-friendly and sustainable construction material in the future in order to minimize PET plastic waste and replace it as a concrete constituent material.
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Researchers tested using crushed waste plastic bottles (PET) in place of some sand in concrete. As more plastic was added, the concrete became less workable, lighter, and weaker, but mixes with up to 4% plastic still met standards for lightweight, non-structural building uses.
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Researchers partially replaced fine aggregate in concrete mixtures with processed PET and other waste plastic particles and found an optimal replacement level that preserved acceptable compressive and tensile strength while reducing density, beyond which plastic-to-cement bonding degraded mechanical performance, suggesting a viable route for incorporating plastic waste into lightweight non-structural construction.
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This study investigated the mechanical properties of concrete incorporating recycled plastic waste as a partial aggregate substitute at varying proportions up to 50%. Results showed that compressive and flexural strengths increased with plastic content up to 30%, suggesting that plastic waste can serve as a functional and cost-effective material in construction applications.
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Researchers found that mixing shredded plastic bottles into concrete, replacing some sand, actually made it stronger when used at the right amount (2%). This matters because it gives plastic waste a useful second life instead of it sitting in landfills or being burned, which releases toxic fumes harmful to human health.
Characteristics of Recycled Polypropylene Fibers as an Addition to Concrete Fabrication Based on Portland Cement
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Researchers investigated the mechanical properties of concrete reinforced with recycled polypropylene fibers from plastic packaging, finding that 1.0% fiber content produced dramatic improvements including up to 69.7% higher compressive strength and 276% higher flexural strength compared to unreinforced concrete.
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