Influência da areia artificial oriunda da britagem de rocha granito-gnaisse nas propriedades do concreto convencional no estado fresco e endurecido

• Ano de defesa: 2007
• Autor(a) principal: CABRAL, Keillon Oliveira
• Orientador(a): FIGUEIREDO, Enio José Pazini
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Goiás
• Programa de Pós-Graduação: Mestrado em Engenharia Civil
• Departamento: Engenharias
• País: BR
• Palavras-chave em Português: concreto, areia-artificial, rocha granito-gnaisse
• Palavras-chave em Inglês: conventional concrete, sand-artificial, rock granite-gnaisse
• Área do conhecimento CNPq: CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::ESTRUTURAS
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tde/669

The dissertation is aimed at the study being presented theoretical and experimental verification of the performance of artificial sand come from crushing the rock of granite-gneiss in relation to natural sand. Currently, the sand has artificially low commercial value of the market and is considered a "some kind of piece of marginal material ", whose purpose is not defined and remained stored in the courtyards of the quarries, forming huge piles that cause various environmental impacts. In addition to this, the traditionalism and the lack of information has led to an unwarranted mystification of this material. The methodology used for the tests of the research was based on standardized tests, which attempt to meet the objectives of the dissertation, in addition to enhancing the development of techniques to search for alternative aggregates. This has examined the influence of artificial sand in place of natural sand, with different proportions, and focuses on quality of the concrete in plastic and hardened its phases, taking into account the mechanical, elastic, physicalchemical, environmental and economic. The work was to characterize the material that composed the concrete studied. After this phase, were up corpses-of-proof concrete, using 15 (fifteen) different traits, so that the natural sand was gradually replaced by artificial sand, in proportions of 25%, 50%, 75%, and 100%. For each trait was quantified its rebate, density, air incorporation, resistance to axial compression, traction, deformation module, absorption by immersion, alkali-aggregate reaction and an economic evaluation. It is considered that the main objective of this research has been fully achieved, because it was proven the theoretical feasibility of replacing part or even all, of natural sand by artificial sand in conventional