Evaluation of Iron Ore Tailings From the Fundão Dam Failure in Mariana-MG As A Partial Substitute For Conventional Fine Aggregates in Cement Mortars

Objective: The study evaluates the effects of partial sand replacement by iron ore tailings (IOT), resulting from the Fundão Dam failure in Mariana, on the production of mortars for civil construction, considering the mechanical properties of compressive strength and pullout resistance. Theoretical Framework: The study is grounded in theories of substituting conventional aggregates with industrial waste in cementitious matrices, focusing on sustainability and mining waste management. Method: Different mortar mixes were prepared, replacing fine and medium-fine sand with varying proportions of RBMF. The analysis involved characterizing the mixes and performing compressive strength and pullout tests to evaluate the mechanical performance of the produced mortars. Results and Discussion: The results indicate that partial sand replacement by RBMF is not the most viable option, but the replacement of 25% of the fine sand fraction showed the best performance, possibly optimizing particle size distribution and packing. Research Implications: The study contributes to future research on the incorporation of RBMF in construction materials, suggesting its use as an addition rather than a substitute in mortar production. Originality/Value: The research innovates by exploring the feasibility of using RBMF in mortars, offering valuable insights into the sustainable management of mining waste and the production of more sustainable construction materials.