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Mechanical Properties of Sustainable Paving Blocks Using Fly Ash and Polypropylene Plastic Waste
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Researchers found a way to turn plastic waste and fly ash (a coal-burning byproduct) into sturdy paving blocks for sidewalks and parks, without using any cement or water. This matters because it repurposes two hard-to-dispose-of waste materials into something useful, though it's worth noting the process melts plastic at high heat, which is different from letting it break down outdoors where it could shed microplastics into soil and water. While this particular study focused on strength and durability rather than health impacts, using waste plastic in solid, bound construction materials is generally seen as a safer disposal path than letting it degrade in landfills or oce
The increasing generation of industrial and plastic waste has encouraged the development of sustainable construction materials. This study investigates the mechanical properties of zero-cement paving blocks utilizing Polypropylene (PP) plastic waste as the sole binder and fly ash as a sand substitute. A direct thermo-mechanical melting process at 180°C–200°C was employed without the use of water or chemical activators. To ensure sufficient binder volume, the PP ratio was fixed at 4 parts. Specimens were tested for compressive strength and water absorption according to the Indonesian National Standard (SNI 03-0691-1996). The results demonstrated a clear dependency between the filler ratio and mechanical performance; a 25% substitution of sand with fly ash achieved the optimal performance, yielding a maximum compressive strength of 11.59± 0.84 MPa and a remarkably low water absorption rate of 0.75 ± 0.31%, while the lowest water absorption of 0.62 ± 0.07% was achieved by the control mixture. However, increasing the fly ash substitution to 50% resulted in a strength reduction due to the inability of the fixed PP matrix to completely encapsulate the high surface area of the fine fly ash particles. Although classified as Quality D paving blocks, this purely waste-derived composite presents a highly viable, eco-friendly solution specifically targeted for light-duty infrastructure applications, such as pedestrian walkways and city parks.
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Pemanfaatan Limbah Plastik Sebagai Bahan Subsitusi Agregat Dalam Pembuatan Paving Block
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Researchers found that mixing recycled plastic waste (about 15% by weight) into paving blocks—the tiles used for sidewalks and driveways—actually made them stronger than blocks made without plastic, while higher amounts weakened them. This matters because it offers a practical way to reuse plastic waste in construction instead of letting it pile up in landfills or break down into microplastics that pollute soil, water, and eventually enter our food and bodies.
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.
Utilization of Plastic Waste in Interlocking Paver Blocks for Sustainable Pavement Construction
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Researchers found a way to turn plastic waste into strong concrete blocks for roads and walkways by mixing shredded plastic pieces with regular concrete ingredients. The plastic-concrete blocks were just as strong as normal concrete blocks, offering a promising solution to reduce the mountains of plastic waste that pollute our environment. This approach could help tackle two major problems at once: getting rid of plastic trash that can break down into harmful microplastics, and reducing the need to mine natural materials for construction.
Evaluation of Polymer Interlocking Paver Blocks Made of Waste Plastic Polyethylene Terephthalate and Sand Modified with Nano-Sized Palm Kernel Shells
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Scientists found a clever way to turn two waste products—plastic bottles and palm kernel shells (a nut-processing byproduct)—into durable paving blocks for sidewalks and driveways. This matters because it keeps plastic waste out of landfills and oceans, where it would otherwise break down into microplastics that can end up in our water, food, and eventually our bodies. While this study focused on construction quality rather than direct health testing, finding practical uses for waste plastic is a promising step toward reducing our overall exposure to plastic pollution.
Sustainable paving blocks by the combination of plastic waste and sand
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Scientists found a clever way to reuse plastic bottles, caps, and labels—the same waste piling up from our bottled water habit—by melting them with sand to make sturdy paving blocks, no cement required. This matters because it gives discarded plastic a useful second life instead of letting it break down into microplastics that pollute soil and water (and potentially end up in our bodies), while also reducing the environmental footprint of cement production.
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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.