CENTRO DE GESTÃO E NEGÓCIOS

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Navegando CENTRO DE GESTÃO E NEGÓCIOS por Assunto "Agregado graúdo"

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    Análise técnica da substituição parcial e total do agregado graúdo por estéril escalpado de mineração destinado a fabricação de concreto
    (Universidade Federal de Goiás, 2018-06-27) Lopes, Diego Faleiros; Silva, André Carlos; http://lattes.cnpq.br/2682532729839545; Silva, André Carlos; Lobato, Luanna Lopes; Paiva, Ed Carlo Rosa
    Although construction in Brazil faces an economic recession since 2014, there is still a high demand for raw materials for construction, such as gravel and sand. The price of materials has increased in recent years, especially when basic products are used for the agriculture industry, since 70 to 80% of the volume of concrete is composed of aggregates of gravel and sand. In 2014, 740 million tons of gravel and sand were consumed in Brazil in construction, while in 2015 the consumption was reduced by 519 million tons. To achieve sustainability it is very important to adopt innovative raw materials, with high quality, low price and environmental impact in your production chain. Mining, in its process of mineral processing, is responsible for generating large quantities of waste without utility and economic value, are highly productive and cause environmental impacts. CMOC International, located in southeastern Goiás, is responsible for producing an approximate volume of 2800 t / day of scalp sterile, excavated materials, generated by the activities of extraction (or tilling) without undercutting of the mine. Thus, the objective was to conduct characterization tests, according to ABNT NBR 7211/2009 of the scaled sterile material of the niobium ore processing industry, and of the aggregate by sterile scalpel and to search for new replacement paths for materials in the production of concrete, with this the amount of environmental resources and the commercialization of a new product through an economic analysis. The classes were classified by means of different types of concrete data molding during the abatement phase, 25, 50, 75 and 100% substitution for the evaluation of productivity, compression and traction, immersion absorption, voids index, mass specific, alkali-aggregate verification. The concretes obtained promising results in the tests, reaching them with the intention, because the material presented characteristics.