Utilização de resíduo de vidro moído como adição mineral para a produção de concreto autoadensável e de alto desempenho

Abstract

High performance concrete, in addition to high strength, has lower permeability and higher durability. The self-compacting concrete reduces the need for densification and scattering and facilitates concreting of slender pieces. The combination of these two concrete on one allows the linking of the qualities of both. In the construction industry, concrete production has potential to reuse some kinds of residues. In this work, the residue of industrial glass was used as mineral additive in the combined production of high performance concrete and self-compacting concrete. The residue of industrial glass, after the grinding process, was added to the concrete with the aim to evaluate its properties in fresh and hardened state. It was possible to evaluate and compare the performance of industrial waste glass with silica fume. Following the experimental program, the materials were characterized and Marsh Funnel tests and minicone of Kantro were performed with the superplasticizer MC-PowerFlow 1102. The optimum dosage of superplasticizer was evaluated in fresh concrete tests. Concrete were produced and characterized in fresh and hardened states. For characterization of concrete in the fresh state, the following tests were used: slump flow, T500, L box, funnel method V and segregation column method. For characterization of concrete in the hardened state, the following tests were performed: axial compression tests, traction by diametrical compression, static modulus of elasticity and water absorption by immersion. Concrete with the addition of waste ground glass hit resistance close to 67 MPa at 90 days, while the concrete with addition of silica fume hit resistance close to 88 MPa at the same age. As the concrete produced with addition of industrial waste glass obtained swift technical skills of high performance concrete and selfcompacting concrete, the results of this research were considered satisfactory.