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Polymeric Wastes as Concrete Aggregate for Acoustic and Thermal Insulation Enhancement
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This review evaluates the use of polyethylene terephthalate (PET) and scrap tire rubber (STR) waste as aggregate substitutes in concrete, finding that while mechanical strength generally declines, these recycled polymer materials can meaningfully reduce thermal conductivity and improve acoustic insulation. Incorporating plastic and rubber waste into concrete offers a practical strategy for diverting these pollutants from landfills.
Polymeric wastes, specifically polyethylene terephthalate (PET) and scrap tyre rubber (STR), pose a significant environmental issue.PET, a thermoplastic polymer, is widely used in manufacturing bottles, PET cups, containers, fibres, films, and packaging materials.On the other hand, colossal rubber tyre waste quantities represent other environmental problems.However, PET and STR wastes are often discarded in the immediate vicinity, contributing to water resource pollution and landfill site strain.One solution is to replace aggregates in concrete mixtures with these wastes, a preferable alternative to landfill disposal because of the large volume and slow decomposition rate in landfills.Recycling PET and STR helps mitigate environmental pollution and promotes resource conservation and sustainability.This study aims to review previous research undertaken in the field and validate the findings of concrete's fresh, mechanical, and functional characteristics.Based on the review, most studies confirmed a noticeable decline in the mechanical characteristics of mortar and concrete.However, these studies did not effectively focus on using PET and STR as sound and thermal insulation aggregates.Replacing PET and STR as aggregate in concrete can reduce thermal conductivity and acoustics.
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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.
Mechanical, Thermal, and Non-Destructive Evaluation of Concrete Incorporating Recycled PET Bottle Aggregates
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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.
Prospects for the Use of Polymer Waste as Concrete Aggregates
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This review examines the use of crushed polymer waste as aggregate in concrete, finding that while it reduces density and improves chemical resistance and abrasion durability, it also reduces compressive strength due to poor adhesion between plastic and the cement matrix. Surface treatment of polymer particles and selection of high-modulus plastics are proposed as strategies to improve the mechanical performance of plastic-aggregate concrete.
Waste Polyethylene Terephthalate (PET) as a Partial Replacement of Aggregates in Sustainable Concrete
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Researchers tested waste PET plastic as a partial aggregate substitute in concrete, finding that up to 10% PET incorporation maintains acceptable compressive strength per ASTM standards, offering a potential pathway to divert non-biodegradable plastic waste into low-load-bearing construction materials.
Natural Rubber Latex-Modified Concrete with PET and Crumb Rubber Aggregate Replacements for Sustainable Rigid Pavements
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Researchers tested concrete mixes that replaced conventional aggregates with recycled PET plastic and crumb rubber waste, modified with natural rubber latex. The results show that waste plastic can be incorporated into road pavement concrete, offering a way to divert plastic waste from landfills while creating durable construction materials.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.