Potencial do resíduo de corte de mármore e granito como matéria-prima alternativa para argamassas de revestimento

Abstract

Currently, large amounts of solid waste are discarded into the environment, causing significant impacts. One of these wastes is marble and granite cutting waste (MGW). Therefore, this study evaluated the technical and economic feasibility of using marble and granite cutting waste as a partial substitute for aggregate and binder in rendering mortars. The research was motivated by the need to reduce the consumption of non renewable resources, such as sand and cement, and to provide an appropriate destination for the waste generated by the ornamental stone industry. For this purpose, experimental mixes were produced with partial replacements of sanda t 10%, 20% and 30%, and of cement at 10% by fine waste, and tested in both fresh and hardened states. The results showed that mortars with MGW maintained workability within the normative range, although with a higher water demand. In the hardened state, Mix T 30F presented the best overall performance, surpassing the reference mortar in compressive strength, flexural tensile strength, and bond strength. The economic analysis indicated a 7.85% reduction in cost per cubic meter, demonstrating technical, environmental, and financial benefits. It is concluded that MGW is a sustainable and viable alternative for rendering mortars, contributing to the preservation of natural resources and the reduction of environmental impacts.