Estudo da aplicação de resíduo de vidro em substituição parcial ao cimento no concreto verde

Abstract

This research seeks to characterize the physical and mechanical properties of concretes produced, with partial replacement of the cement by glass residue in different percentages. The constituents of the concrete were characterized, with the aggregates and glass residue being ground in terms of granulometry and chemical composition, with the technique of X-ray fluorescence, crystallinity with the diffraction- X and pozzolanic activity. Partial replacements of the cement by the glass residue were 0%, 5%, 7.5%, 10% and 12.5%. In the hardened state, axial compression and diametral compression tensile tests were performed at the ages of 7, 28 and 56 days. The results of the characterization of the glass residue showed that the material is rich in amorphous silica, which promoted a pozzolanic activity index with 93% cement at 28 days. The results of the characterization of the concrete showed that in the fresh state the addition of the glass percentages studied slightly altered the workability and not significantly the specific mass.In the hardened state the additions promoted significant axial compression strength gain at advanced ages of 56 days.