Obtention of eco-efficient cement-based composites using industrial waste.
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Data
2019
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Resumo
Portland cement is the main responsible for the low environmental performance of
cement-based composites since its production implies the emission of large amounts of
carbon dioxide in the atmosphere. Achieving more eco-efficient concrete, therefore,
means an effective contribution to mitigating human-made impacts. The search for less
aggressive binders and the partial substitution of Portland cement for supplementary
materials of low environmental impact are effective mitigation routes that are explored
in this thesis. Concomitantly, the consumption of by-products from other productive
sectors as inputs in the production of concrete, besides being an effective way of saving
natural resources, provides an adequate destination to environmental liabilities. Thus, as
part of the work related to this research, a low environmental impact cement produced
entirely with industrial and mining wastes was successfully proposed and obtained. This
material presented technological characteristics compatible with belitic cements
obtained with conventional materials. In addition, supplementary fine materials socalled
Engineered Recycled Mineral Admixtures were designed and produced to
partially replace Portland cement and increase the packing density of the fine fraction in
cementitious matrices. An extensive characterization program of these materials was
conducted, as well as performance evaluation in pastes, mortars and concretes,
including rheology, hydration kinetics, cementing properties and mechanical
performance. Finally, these materials were used in the production of densely packed
concretes, where the great potential of the proposed products in the obtention of cementbased
composites with high mechanical strength and/or high eco-efficiency was
observed.
Descrição
Programa de Pós Graduação em Engenharia Civil. Departamento de Engenharia Civil, Escola de Minas, Universidade Federal de Ouro Preto.
Palavras-chave
Concreto eco-efficiente, Cimento belítico, Adição mineral reciclada engenheirada, Rejeito industrial, Reciclagem
Citação
CARVALHO, José Maria Franco de. Obtention of eco-efficient cement-based composites using industrial waste. 2019. 230 f. Tese (Doutorado em Engenharia Civil) - Escola de Minas, Universidade Federal de Ouro Preto, Ouro Preto, 2018.