Argamassa de cimento Portland com diferentes teores de substituição da areia por resíduo de rochas ornamentais.

Abstract

In the construction industry various natural resources are employed, of which they are responsible for waste generation. During the process of beneficiation of ornamental rocks, tons of waste are generally generated in the nature, causing several environmental impacts. Given this, this work aimed to evaluate the replacement of natural sand by ornamental rock residue in the contents of 10, 20, 30%. In the formulation of coating mortars, a 1: 4 mass was adopted (Portland cement: fine aggregate), using Portland CP II-F 32 cement, with water / cement factor between (0.65 and 0, 95). The mortars were analyzed in the hardened state by compressive strength, immersion absorption and capillary absorption tests. The Pozzolanic activity of the residue was also evaluated. The characterization of the ornamental rock residue showed that the residue has a number of fines which led to a decrease in resistance and an increase in water absorption. Regarding the Pozzolanic activity test, it was observed that the ornamental rock residue presented the minimum values required by Brazilian normalization to be considered a pozzolan.