Produção e caracterização de compósito de matriz geopolimérica com adição de resíduo industrial

Abstract

Industrial processes generate a significant variety of residues which is difficult to decompose. The main goal of this research is to present an alternative for the final destination of this materials, specifically polystyrene. While main polymers are based of carbon structures, geopolymers are based of silica and alumina structures. Among possible applications, they can be used in pastes, mortars and concretes, replacing Portland cement. For the addition of the industrial residue in the geopolymer matrix was made its characterization, as well as the precursors of the geopolymer. The Fourier Transform Infrared Spectroscopy (FTIR) analysis demonstrates that the residue used has in its chemical composition a higher amount of silicon dioxide and aluminum dioxide. The results of X-ray diffraction (XRD) analysis on the residue sample and the geopolymer matrix confirm the chemical composition provided by the industry, as well as the geopolymerization process. Thermogravimetry (TG) and thermogravimetry derived (DTG) analysis show that the residue has very little water loss prior to total sample degradation. The compressive strength test showed a significant improvement on the residue’s incorporation to the geopolymer matrix, reaching at 28 days about 29.13 MPa (5% ground residue) and 4.44 MPa (5% screened residue). The flexure test demonstrates that the addition of the sieved residue to the matrix resulted in an improvement in strength that reached 2.07 and a 0.66mm deformation, about 7.73% higher than the matrix.