Avaliação técnica dos resíduos gerados em ETA como substituto parcial de agregados em componentes cimentícios - PAVERS

• Autor(a) principal: Araújo, Flávio de Carvalho
• Data de Publicação: 2017
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/7970
• topic: Concreto; Cimento; ETA; Resíduo; RETA; Sustentabilidade; Concrete; Cement; WTP; Residue; Waste; ENGENHARIA CIVIL::CONSTRUCAO CIVIL

The present research proposes a technical evaluation for the use of the waste generated in the Water Treatment Plant, Eng. Rodolfo José Costa e Silva, located in the city of Goiânia, State of Goiás, Brazil, as a partial substitute for the fine aggregates of cementitious elements. The study conducted the analysis of the residues, from the material science point of view, through the physical and mineralogical characterization, as well as the investigation concerning the possibility of pozzolanic activity of the material. Therefore, the parameters found were compared based on specific literature and current normalizations, and the study evaluated the similarity between the residue characteristics and the traditional raw materials used in the production of cementitious materials, such as sand, clay, and limestone; in this context, an experiment was carried out with the application of WTP residues in a component used in construction: concrete floor (Paver). The results of the mechanical tests were statistically analyzed to see the influence of the residue, age and interaction between these variables in the results. It was found that the proportion of 5% of residue significantly improved the mechanical resistance of Pavers (33.5%) at 28 days in the control sample, but water absorption increased (68.8%). In this way, a sustainable alternative of insertion of the waste in the productive chain of the construction was sought, producing a cement element, and at the same time contributing to reduce the environmental impact caused by the release of the residues in the springs. Aiming at reducing the environmental liabilities of the water industry, as well as reducing the extraction of raw material for cement production.