Caracterização do resíduo de mármore em pó e estudo da viabilidade de incorporação em argamassas.

Abstract

The ornamental and cladding rocks are defined by ABNT, respectively, as a natural rocky substance that under different degrees of modeling or processing, can be used with any aesthetic function and a rocky material that can be unfolded and suited to different finishes Of wall and floor surfaces in civil constructions. Besides providing beauty and durability to buildings, they are part of an important sector of the economy in several countries, Brazil being one of the main exporters in the world, with Espirito Santo state as the largest producer. The branch of civil construction focused on alternative materials is very comprehensive, several studies are carried out with different materials. In part, these studies are due to the fact that several industries produce waste that can cause damages to the environment, among them, the ornamental stone processing industry is responsible for several environmental impacts, from mineral exploration to the polishing phase of Slabs and tiles. These impacts include dust, noise and vibrations, mud and rock fragments. In the sawing of the plates one loses about 25% to 30% of marble that turns into powder, generating a residue in the form of mud. Thus, the aim of this study was to verify the feasibility of using the residue in the mortar. Physical, chemical and mineralogical characterization of the residue and physical and mechanical characterization were carried out from the production of specimens measuring 5 cm x 10 cm. It was observed that mortar with substitution of 20% of the small aggregate presented better results of resistance to compression when compared to the reference mortar. For the chemical composition it was verified that it is similar to conventional raw materials used in the production of the mortar, and as mineralogical phases calcite and dolomite, the main constituents of the carbonaceous rocks. Thus, it is feasible to use the residue in the mortar.