Development of pavement concretes with incorporation of residual marble powder

This study investigates the use of residual marble powder as a filler in the production of concrete for interlocking pavements, replacing 15% and 25% of natural sand—percentages that remain underexplored in the literature. The physical and crystalline properties of the materials were analyzed, as well as the mechanical and microstructural characteristics of the concretes produced. The results indicate that marble powder reduces voids in the cementitious matrix, resulting in stronger, denser, and more homogeneous concrete. The compressive strengths achieved, close to 40 MPa, meet the requirements of the Brazilian technical standard for interlocking pavement. It is concluded that the incorporation of industrial waste not only improves material performance but also reduces the consumption of natural resources and the environmental impacts associated with their extraction, promoting a more sustainable approach to civil construction.