ANÁLISE DA VIABILIDADE DE UTILIZAÇÃO DO RESÍDUO DA LAPIDAÇÃO DO GRANILITE EM CONCRETO PERMEÁVEL

Abstract

With rising incidence of flood and inundation in urban areas, the adoption of permeable pavements has become increasingly advantageous. In this connection, this work aims to evaluate the influence of the addition of granilite stoning residue (GSR) on the mechanical and microstructural behavior of the permeable concrete. Three different mixtures were evaluated: a reference sample (R.S) determined based on the literature review and dosed with only natural aggregates, and two others dosed with the same proportion of cement paste and aggregate of R.S, but only 2% (S.2GSR) and 4% (S.4GRS) of the residue were added. The results indicated for the samples S.2GRS and S.4GRS, respectively, an increase in compressive strength of 131.4% and 103.6% and an increase in flexural tensile strength of 104.0% and 160.7% in relation to the reference mixture. A permeability decreases of 51.8% and 20.0% and reduction of the void index to 26.56% and 14.8% were observed for the samples S. 2GRS and S. 4GRS, respectively. Therefore, due to the significant increase of mechanical resistance and compliance with the minimum requirement of 1 mm/s of permeability, the analyzed samples can be recommended, especially the T.4RLG because it allows greater reutilization of the residue.