USE OF EPOXY RESINS IN CREATING POLYMER-CONCRETE COMPOSITES BASED ON SECONDARY POLYMER WASTE
Authors/Creators
- 1. Assistant, Department of Materials Science, Andijan State Technical Institute, Andijan, Uzbekistan
Description
The growing accumulation of secondary polymer waste poses significant environmental and economic challenges for industrial regions. The use of recycled polymers — including polyethylene (PE), polypropylene (PP), and acrylonitrile butadiene styrene (ABS) — as functional components in construction composites represents a promising direction for waste valorization. This study investigates the effect of epoxy resin (ED-20) as a binding matrix on the mechanical and physical properties of polymer-concrete composites incorporating 10–30 wt.% of secondary polymer fillers. Specimens were prepared via hot-mixing and cold-curing techniques, followed by mechanical testing in accordance with GOST standards. Results demonstrate that the optimal composite formulation containing 20 wt.% recycled PP granulate and 15 wt.% ED-20 epoxy binder achieved a compressive strength of 52.4 MPa — a 34% improvement over conventional cement-sand mortar — alongside a water absorption reduction of 61% and a density decrease of 12%. Scanning electron microscopy (SEM) confirmed strong interfacial adhesion between epoxy matrix and polymer filler particles. The proposed composite formulations are economically viable, reducing raw material costs by 15–22% while supporting circular economy principles. These findings confirm the feasibility of implementing secondary polymer waste in epoxy-based polymer-concrete systems for flooring, chemical-resistant coatings, and structural repair applications.
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References
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