2026-04-082026-04-082025-09-29https://repositorio.ifal.edu.br/handle/123456789/1480Limnoperna fortunei (golden mussel) is an invasive species whose rapid proliferation in freshwater systems has generated environmental and economic impacts, resulting in large volumes of biomass without an adequate destination. In this context, the present study evaluated the technical feasibility of incorporating golden mussel shells as a partial replacement for fine aggregate in the production of hollow concrete masonry blocks. The experimental procedure consisted of four stages: shell collection, physicochemical characterization (granulometry, Xray diffraction, X-ray fluorescence, and thermogravimetric analysis), production of concrete specimens, and technological testing. Concrete mixtures were prepared with 0%, 10%, 20%, 30%, 40%, and 50% replacement of natural sand by crushed shells, and cylindrical specimens were molded in accordance with NBR 5738. The specimens were subjected to water absorption, compressive strength, and scanning electron microscopy tests. The results showed that replacement levels of up to 30% maintain mechanical performance compatible with the requirements for structural and non-structural concrete blocks, while the 50% replacement level is suitable only for non-structural (partition) blocks. The findings confirm that golden mussel shells can be used as a subproduct in cementitious matrices, providing a sustainable alternative for waste recovery and contributing to the reduction of natural resource consumption in the construction sector.ptImpacto ambientalLimnoperna fortuneiConstrução civilBiomassaConcreto sustentávelResíduosDissertaçãoOUTROS