CENTRO DE GESTÃO E NEGÓCIOS

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Navegando CENTRO DE GESTÃO E NEGÓCIOS por Assunto "Alternative materials"

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    Análise técnica da substituição parcial do agregado miúdo por rejeito magnético na produção de concreto
    (Universidade Federal de Goiás, 2016-08-12) Mendes, Marcos Vinicius Agapito; Paula, Heber Martins de; http://lattes.cnpq.br/6511292268901783; Silva, André Carlos; http://lattes.cnpq.br/2682532729839545; Silva, André Carlos; Leal, Geraldo Sadoyama; Silva, Wellington Andrade da
    The sustainable development becomes important to the processes and products of organizations. Considering this context, the construction and mining seek to innovate to reduce costs and environmental impacts. Alternative materials that replace the mains concrete components, one of the most used materials in construction, may innovate the market and ensure the sustainable development of organizations. This work studied the behavior of the mechanical strength of conventional molded concrete with partial replacement of fine aggregate by magnetic tailings from the phosphate rock processing Catalan/GO region. Characterization tests were performed for concrete components (physical and chemical), consistency of performance evaluation in fresh through frustum of abatement tests (slump test), compressive strength and tensile, inference permeability conditions from immersion absorption tests, measurement of possible magnetic properties and determining the percentage of increase in density, allowing set dosages similar final characteristics or better than the reference concrete. The results indicate the influence of the partial replacement of fine aggregate by magnetic reject the frustum of abatement in the results for concrete with moderate amounts of water. The immersion absorption rates accuse larger permeabilities in concretes with high rates of water. The density was slightly influence of replacement and concrete didn’t show magnetic properties. The results of mechanical resistance tests show similar to standard concrete the possibility of replacing the sand by magnetic reject at 5, 10 and 30%. There is still the possibility of forming with 20% replacement in concrete with low and moderate amounts of water, showing results of mechanical strength higher than all other proposed dose in this study.