Valorização da areia de fundição na correção de faixa granulométrica do solo de Pato Branco - PR: estudo aplicado em tijolos de solo-cimento

Abstract

Driven by technological and scientific advancements, industrial society has witnessed remarkable growth in urbanization, accompanied by significant annual consumption of raw materials. This scenario raises debates about sustainability, especially in the construction industry, where there is discussion about the excessive use of natural resources and the generation of manufacturing waste, such as foundry sand. In this context, incorporating this waste can be a viable solution for the physical and mechanical correction of clay soils for the production of soil-cement bricks. This study investigates the feasibility of replacing native sand with foundry sand in the manufacture of soil-cement bricks, aiming to value insdustrial waste and promote sustainable practices in construction. The research includes evaluating the mechanical properties of specimens produced with different proportions of cement and corrected soil, varying from 1:5, 1:6, and 1:7 (cement:soil), and with a foundry sand content of 1:2 (soil:foundry sand). Compression strength and water absorption tests were performed on the produced specimens, verifying compliance with current technical standards and determining the notional proportion of foundry sand to optimize the strength and behavior of the bricks. Statistically evaluated results reveal that the addition of foundry sand does not compromise the properties of soil-cement bricks, even exceeding the minimum requirements established by the standard, with an average maximum compressive strength of 4,29 MPa and an average water absorption of 12,17% for the 1:5 proportion. Furthermore, this practice contributes to the reduction of native resource exploitation and helps mitigate the environmental impacts resulting from the improper disposal of manufacturing waste.