Aproveitamento do resíduo de marmoraria (Lama) como substituinte parcial do cimento em pastas cimentícias

Abstract

The Portland cement industry is responsible for a significant share of global CO2 emissions, making the search for sustainable substitute materials urgent. Simultaneously, the ornamental stone sector generates large volumes of marble waste (marble sludge), which is often disposed of improperly. This review article analyzes the state of the art regarding the use of marble powder as a supplementary cementitious material, based on a systematic survey of the ScienceDirect database. The literature demonstrates that the partial replacement of cement with marble powder at levels ranging from 5% to 20% is technically feasible, maintaining or increasing compressive strength while contributing to a reduction in the final material's carbon footprint. Beyond mechanical viability, the use of this waste enhances the dimensional stability and durability of cementitious pastes. It is concluded that incorporating this waste is a promising circular economy strategy, enabling cost reductions and lower environmental impacts in the construction industry through the large-scale repurposing of an industrial waste product.