Detalhes bibliográficos
| Ano de defesa: |
2023 |
| Autor(a) principal: |
Santos, Jéssica Rodrigues dos
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| Orientador(a): |
Oliveira, Andrielli Morais de
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| Banca de defesa: |
Oliveira, Andrielli Morais de,
Matos, Oswaldo Cascudo,
Cascudo, Helena Carasek,
Santos, Karyne Ferreira dos |
| Tipo de documento: |
Dissertação
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| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal de Goiás
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| Programa de Pós-Graduação: |
Programa de Pós-graduação em Geotecnia, Estruturas e Construção Civil (EEC)
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| Departamento: |
Escola de Engenharia Civil e Ambiental - EECA (RMG)
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| País: |
Brasil
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| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://repositorio.bc.ufg.br/tede/handle/tede/12912
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Resumo: |
Studies of rheology and optimization of Portland cement mixtures can play an important and prominent role in the correlation with performance, mechanical behavior, high durability and service life in the hardened state of concrete. The present work encompasses stages of rheological characterization of Portland cement pastes, with the aim of evaluating the intervention of chemical admixture and silica fume contents (8%, 10% and 12%) in two water/binder ratios (0.40 and 0.55). Additionally, these variables were also analyzed in concrete, measuring the rheometric parameters, basic mechanical behavior properties (compressive strength and modulus of elasticity) and water absorption. In addition, the chemical admixtures were characterized physic-chemically and the validation of a technical instruction for conducting rheology tests on pastes was proposed. As a result, the superplasticizer type admixtures and those with higher solids content exhibited better behavior in the viscosity properties and shear rate of the pastes. The 8% silica fume content was more interesting in terms of mechanical behavior and water absorption. The paste results were coherent with the results obtained from the concretes. |
