Estudo do uso de cinza de casca de arroz como material cimentício suplementar para produção de concreto

• Autor(a) principal: Camilo, Marcos Goulart
• Data de Publicação: 2018
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Universitário da Ânima (RUNA)
• Texto Completo: https://repositorio.animaeducacao.com.br/handle/ANIMA/4476
• topic: Cinza de casca de arroz; Cimento; Meio ambiente

In the rice processing industry, the rice husk is used as an energy source, producing ash after burning. This ash is usually disposed of incorrectly, which harms the environment. This research aimed at the use of this RHA in the partial substitution of Portland cement in the production of mortar. Samples with 10%, 20% and 30% of RHA contents that were submitted to the drying and milling process were produced without the addition of RHA, and others with 10%, 20% and 30%, produced with RHA in crude form, partially replacing Portland cement in the manufacture of mortar. The mortars produced underwent axial compression tests at the ages of 3, 7 and 28 days. At all ages the reference samples obtained the best results, and the samples produced with crude RHA had the worst results. However, the samples with 20% of treated RHA were highlighted by the higher resistance gain during the tests, showing a tendency to exceed the values of the reference samples at ages greater than 28 days.Economically the mortar produced with partial replacement of Portland cement by 20% of treated RHA proved to be feasible, provided they are not used in places that require high initial resistance. In contrast, mortars produced with different concentrations of crude RHA were not feasible due to the low resistance achieved. Environmentally the use of RHA also brings benefits, because it reduces the production of cement and, consequently, the CO2 emissions.