Argamassa autonivelante com adição mineral (fíler) de resíduo de beneficiamento de mármore e granito.

Abstract

The process of processing marble and granite rocks generates solid waste along its production chain. These residues have environmental impact potential when not properly managed. The waste produced in the polishing phase of marble and granite slabs can be incorporated into the construction industry as an alternative material for the production of concrete and mortar, contributing to technical performance, economic and environmental viability. In this aspect, this work aims to characterize the marble and granite beneficiation residue (RBMG), in its natural state, and uses it as a self-leveling mortar addition to promote cohesion, similar to the viscosity modifying additive (VMA). For this, a reference mortar was produced, one with addition of RBMG and one with addition of VMA. Where, first, the rheological behavior of the pastes and mortars was analyzed. Then, the mechanical properties, durability and microstructural properties of self-leveling mortars were measured. The results show that the RBMG has no pozzolanic potential. The mortar with RBMG presented optimized mechanical properties and durability in relation to the reference mortar, and similar to the mortar with VMA. The microstructural assay demonstrated that RBMG promoted pore refinement of the cementitious structure, probably due to the granular variation of the particles of the residue, providing greater compactness with the optimization of grain packing. It is concluded that the RBMG can be used as an alternative material to replace the VMA, which is an expensive and difficult to reach product in Belém/PA.