Chemical recycling of EPS in the production of lightened gypsum composites.
DOI:
https://doi.org/10.21041/ra.v16i2.1039Keywords:
plaster composites, waste revalorization, chemical recycling, energy efficiencyAbstract
This study develops new gypsum composites by reusing large volumes of expanded polystyrene (EPS) waste through chemical recycling, thereby replacing natural raw materials. Physicochemical, mechanical and environmental characterisation enabled analysis and comparison based on the solvent used. The composites exhibit lower density and thermal conductivity, with good mechanical performance. The environmental impact of the composites is primarily linked to the type of solvent used, and further research is needed to explore more sustainable alternatives. This dissolution process induces microstructural changes, reducing crystal size and causing crystal agglomeration depending on the type of solvent used. The new composites promote the use of secondary materials whilst improving energy efficiency in buildings.
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