STUDY OF THE ADDITION OF ETA SLUDGE - WATER TREATMENT PLANT TO COATING MORTARS

• Autor(a) principal: Laurindo, Sibele Silveira
• Data de Publicação: 2020
• Outros Autores: Antunes, Elaine Guglielmi Pavei, Savi, Aline Eyng, Speck, Jaison Araujo, Piva, Jorge Henrique
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Mix Sustentável (Online)
• Texto Completo: https://ojs.sites.ufsc.br/index.php/mixsustentavel/article/view/3806
• topic: Argamassa de Revestimento; Lodo de Estação de Tratamento de Água; Aproveitamento de Resíduos; Produto sustentável

In the process of water treatment, more precisely in the washing of the filters and discharge from the decanters, a residue known as sludge is produced. This, in turn, is still largely neglected and in most cases, this sludge has its final inadequate disposal being deposited in water bodies or in waste land, causing pollution of these places. In this research, tests were carried out with the waste collected in a water supply concessionaire in the southern region, characterizing its physical and chemical properties, and later, producing mortars with 0%, 3%, 5% and 10% addition of the sludge from the ETA in relation to the aggregatemass. Starting from an experimental planning of mixtures, the influence of trace on the tensile strength in flexion, axial compression, water absorption by capillarity and elasticity modulus after 28 days of curing was verified. The results indicate that the mechanical properties of mortars suffer a decrease with the addition of water treatment sludge in relation to the reference mortar, with its incorporation the mortars showed lower values of modulus of elasticity, which indicates that these mortars have a good capacity to suffer deformations, and the addition of water treatment sludge enabled the reduction of water absorption by capillarity of mortars, leaving them more resistant against deleterious agents that cause pathologies in them.