Estudo da influência da substituição parcial do aglomerante por resíduo industrial de granito em argamassas

Abstract

According to the Brazilian association of ornamental rocks (base year 2019), mineral exports were 1,960 million tons and it is estimated that 30% of each block extracted during the production process becomes waste. The incorrect disposal of these residues has caused great disturbances to the fauna, flora, aquifers, air and the population of neighboring communities. So there is a need for the use of alternative materials that can contribute to mitigate environmental impacts and even improve the quality of the materials. So the research aims to analyze and study the behavior of industrial granite waste in mortars for laying and lining walls and ceilings, with partial incorporation in the binder. A ratio of 1: 1: 5 (cement, lime and sand) was determined, with a variation of the percentage of residue from 5% to 20% and using the factorial design the water / cement factor varied from 1.3 to 1.7. Mortars were analyzed in the hardened state by determining the mass density in the hardened state, tensile strength in flexion and compression and the capillary coefficient, in the fresh state water retention and mass density in the fresh state were determined. The characterization of the residues was chemical and physical through the determination of the fineness index. Among the tests carried out, the resistance to compression stood out, which obtained very satisfactory results and greater than mortars without residues in their composition. The main feature of the RIG was filler, thus reducing empty spaces and sometimes carrying out particle size packing. So in the world we live in, we need alternatives that reduce the consumption of raw materials and also technologies to incorporate the waste generated again in the production chain.