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Valorization of construction and demolition waste as reinforcing nanofiller for polymer composites
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Scientists found a clever way to recycle two problem wastes at once: they ground up leftover concrete and brick dust from demolition sites and used it to strengthen recycled plastic, making it just as sturdy (or sturdier) than plastic reinforced with commercial clay additives. This matters because it could reduce the amount of both plastic and construction debris piling up in landfills, while also potentially cutting down on new plastic production—an important step in addressing the broader plastic waste and microplastic pollution problem, since less waste means fewer opportunities for plastics to break down into the tiny particles now showing up in our water, food, and even
Plastics represents one of the largest global waste streams, with recycling limited by their heterogeneous composition and degraded properties. Simultaneously, construction and demolition activities generate significant amounts of fine fraction waste without reasonable utilization objectives. This study investigated the potential of combining heterogeneous plastic waste and construction and demolition waste (CDW) powder into high-value nanocomposites at various filler loadings (1, 2.5, and 5 wt%), aiming to enhance the mechanical performance of recycled plastics. Virgin polypropylene matrix and commercial nanoclay were used as reference materials. The CDW powder exhibited comparable overall performance to commercial nanoclay in elastic modulus (+ 12%) and even outperformed it in terms of tensile strength (+ 3% vs. +0.4%). Statistical analysis using two-way ANOVA (n = 12, α = 0.05) confirmed that both filler type and loading level significantly affected tensile strength of composites (p < 0.0001), while elastic modulus was primarily influenced by the filler loading. Furthermore, a theoretical model predicting interfacial adhesin between polymer matrix and reinforcing fillers supported these results, indicating stronger polymer-particle adhesion with CDW particles compared to nanoclay. These findings demonstrate that nanoreinforcement is an effective strategy to valorize recycled plastics by improving their mechanical performance and establish CDW-origin filler as a competitive alternative to conventional virgin fillers in the polymer industry.
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Utilization of Plastic Waste and Construction Demolition Waste in Sustainable Brick and Tile Manufacturing
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Researchers turned plastic trash and construction rubble into bricks and tiles, finding they're strong, lightweight, and durable enough for building use. This matters because it offers a practical way to keep plastic waste out of landfills and nature—where it would otherwise break down into microplastics that contaminate soil, water, and eventually our food and bodies—while also cutting down on mining raw materials for construction.
High-strength composites by thiocracking of high-polypropylene-content mixed waste
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Scientists found a way to turn mixed plastic trash—the messy kind that's normally too hard to recycle and often breaks down into microplastics polluting our environment—into a strong building material as sturdy as concrete. This matters because it could give hard-to-recycle plastics a useful second life instead of letting them pollute waterways and ecosystems, while also creating far less climate-warming pollution than making traditional cement.
Effect of Plasticizer on Workability and Compressive Strength of Recycled Coarse Aggregate Concrete
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Note: this paper is about construction materials engineering, not human health, it doesn't involve microplastics or health outcomes. Researchers found that adding a small amount (1%) of a chemical additive called plasticizer to concrete made from recycled construction debris actually makes it stronger and easier to work with than regular concrete, while adding too much weakens it. This matters for sustainable building practices, since it means we can reuse demolished concrete waste instead of mining new materials, but it doesn't directly relate to human health or microplastics.
Mechanical properties of recycled plastic composites reinforced with construction and demolition waste using various particle sizes
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Researchers incorporated finely ground construction and demolition waste into a mixed recycled plastic matrix and found that smaller particle sizes (down to ~9–13 µm) improved tensile strength by up to 11% and elastic modulus by 7%, outperforming commercial nanoclay and demonstrating CDW as a viable reinforcing filler for recycled polymer composites.
Performance evaluation of PET-modified concrete with PET granules and manufactured sand as fine aggregates
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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.
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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.