Caracterização física e mecânica de pavers com substituição parcial do aglomerante por resíduos vítreos

Abstract

Due to the great daily demand of landfills, reuse and recycling are necessary whenever possible. Glass, which still does not have a defined recycling, is a material with great availability in these landfills, and it is important to carry out studies that enable its application in several areas, such as civil construction. In the global context, the amount of discarded glass is about 105 million tons per year. In Brazil, it is estimated that more than one million tons of glassy waste are deposited in landfills and dumps. In the city of Toledo, Paraná, around 30 tons of glassy waste are produced monthly. For this, two traits (rich and poor) were calculated for the execution of pavers and compared to the trait of a cement artifacts company based in Toledo-PR. The poor mix that obtained the most satisfactory results was chosen to carry out compressive strength and water absorption tests with different percentages (0%, 10%, 20%, 25%, 30% and 35%) of partial replacement of the hydraulic binder by glass powder. In the compressive strength test, only the 0% and 10% traces reached 35 MPa, the minimum requirement required by NBR 9781 (ABNT, 2013). In the water absorption test, the 25% and 30% traits did not meet the maximum limit of 6%. In the analysis of the constituents of the concrete, the evolution of the resistance of the pieces was verified according to the process of the hydration reactions of the dicalcium and tricalcium silicates (C2S and C3S). When carrying out the visual inspection, it was verified great similarity between the pieces, there were no apparent pores and the surfaces were marbled. The financial analysis was carried out relating the traits 0% and 10% and a significant economy in production was verified (R$ 4,748.28/year). Thus, in addition to the financial factor, production is sustainably viable because it uses vitreous waste and collaborates to solve an environmental problem.