Viabilidade da utilização dos resíduos de concreto para novos concretos
Seen as one the biggest generators of solid waste, the civil construction sector has consistently been searching for alternatives more targeted in sustainability. Henceforth, there is ongoing effort to reduce the rubble created by the sector, with many researches being actively developed to improve...
| Autor principal: | Luiz, Marcio Oliveira |
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| Formato: | Trabalho de Conclusão de Curso (Graduação) |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2022
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/28517 |
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| Resumo: |
Seen as one the biggest generators of solid waste, the civil construction sector has consistently been searching for alternatives more targeted in sustainability. Henceforth, there is ongoing effort to reduce the rubble created by the sector, with many researches being actively developed to improve material reuse in construction waste, such as creating new materials to absorb the residues, erstwhile irregularly discarded, in the civil industry itself. To produce structural concrete from recycled aggregates, it is necessary to reach a minimum strength for use, and linked to the strength factor there is also the workability of the concrete. One of the factors that interferes with resistance is the water/cement ratio, so the higher the water/cement ratio, the lower the resistance. Water consumption is related to the void ratio of concrete in the hardened state, the more water the concrete consumes, the greater the influence on the void ratio. This directly affects its resistance, as in the curing process, air bubbles get trapped inside the concrete mass, generally interconnected to each other, thus facilitating the penetration of aggressive agents, and consequently creating weak points. Recycled concrete used as aggregates absorb more water than conventional concrete, making it less resistant, which is why an entire study is needed in the incorporation of these aggregates. This work aims to replace natural coarse aggregate recycled aggregate in proportions of 20%, 40%, and 60% in the production of concrete with structural characteristics used in civil construction, as to evaluate its mechanical resistance to compression and cure. |
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