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Dissertação
Concreto com utilização de agregado graúdo sintético produzido a partir da lama vermelha: estudos de dosagem, propriedades e microestrutura
Currently sustainability issues have gained prominence on the world stage in various sectors of society. Several researchers (LIMA, 2006; Hildebrand, 1998; SOUZA, J., 2010, ROSSI, 2009, etc..) Have tried to propose an interaction between the construction industry and those who engage in mineral prod...
Autor principal: | ROSÁRIO, Kátia Alrelhia do |
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Grau: | Dissertação |
Idioma: | por |
Publicado em: |
Universidade Federal do Pará
2015
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Assuntos: | |
Acesso em linha: |
http://repositorio.ufpa.br/jspui/handle/2011/6266 |
Resumo: |
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Currently sustainability issues have gained prominence on the world stage in various sectors of society. Several researchers (LIMA, 2006; Hildebrand, 1998; SOUZA, J., 2010, ROSSI, 2009, etc..) Have tried to propose an interaction between the construction industry and those who engage in mineral production and processing, such as the beneficiation of bauxite. In this context, finding viability for the recovery of waste generated in large quantities and no use would contribute to the preservation of the environment, insofar as it would reduce consumption of resources from natural sources and increase the supply of inputs in construction market. This work is discussed the feasibility of producing a concrete, it has characteristics which renders itself to use as raw material in the construction industry, by using an synthetic aggregate obtained from the red mud (bauxite waste improvement) . According to the experimental program to be executed, the aggregates and the concrete produced will have their properties analyzed in order to study the production process and
measurement respectively. Aggregates are analyzes of: porosity, water absorption, bulk density and Los Angeles abrasion and concrete, workability, density in fresh and hardened, compressive strength, tensile strength by diametrical compression, tensile bending, water absorption and elastic modulus. It is noteworthy that significant importance is given to the transition zone paste / aggregate, by analysis of the microstructure of concrete produced. Analysis is performed by means of tests: Mercury intrusion porosimetry (MIP) and Scanning Electron Microscopy (SEM). The
results of the analyzes of the synthetic aggregates and concrete produced
satisfactory results, showing that they have potential for use in the construction industry. |