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Mechanical properties studying in concrete through PET plastic and rubber waste integration in mixture
Summary
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.