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Mechanical properties studying in concrete through PET plastic and rubber waste integration in mixture
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Researchers incorporated recycled PET plastic and rubber tire waste as partial replacements for fine and coarse aggregates in concrete mixes at substitution rates up to 60%, finding that while compressive strength and density declined with higher replacement ratios, the resulting lightweight concrete could reduce structural dead loads and offers a viable outlet for polymeric waste in non-load-bearing applications.
This study investigates a sustainable method of producing concrete from recyclable rubber (tyre) and plastic made from PET. Due to insufficient recycling facilities and overflowing landfills, PET and rubber waste disposal in Iraq is becoming a significant issue. Recycle these waste materials as partial substitutes for fine aggregates by recycled polyethylene terephthalate cups (RPTC) and coarse aggregates by recycled rubber tyres (RRT) at 15%, 45%, 45%, and 60% replacement rates. A control mix (conventional concrete) with eight replacement mixes for each sand and gravel. The test samples indicated a decline in fresh and mechanical concrete properties. However, lightweight Concrete (LWC) was obtained when replacement ratios exceeded 45% for both RPTC and RRT. This can reduce dead loads in engineering structures. The study examines how this changed concrete mix affects density and mechanical strength and reduces polymeric waste pollution. Higher PET and rubber aggregate proportions lower density and compressive strength, making these modified concrete materials appropriate for non-load-bearing, lightweight, and potentially insulative applications. This research can help Iraq's waste management issues, which support global sustainability.
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Researchers incorporated recycled PET bottle aggregates into concrete at up to 30% replacement of natural aggregate, finding that 10% fine PET slightly improves compressive strength while higher substitutions reduce strength by up to 31%, though thermal conductivity drops by up to 42%, making PET-based concrete promising for lightweight insulating applications.
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Researchers incorporated ground polypropylene plastic waste and pulverized printed circuit board powder as partial replacements for sand and cement in concrete, finding roughly 11% reductions in compressive strength and beam load capacity, with life cycle assessment showing cement replacement yielded far greater environmental benefit than aggregate substitution.
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