Incorporação conjunta de resíduos de EVA e EPS em concreto leve sem função estrutural: avaliação da mistura dos resíduos e influência da pré-hidratação
Several environmental impacts are caused due to the extraction of natural resources, low levels of reuse of waste and the high rate of irregular disposal. In this sense, the highlights are Vinyl and Ethylene Acetate (EVA) and Expanded Polystyrene (EPS), popularly known as Isopor®, which have difficu...
| Autor principal: | Thom, Daniel Cardoso |
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| Formato: | Trabalho de Conclusão de Curso (Graduação) |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2021
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/26318 |
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| Resumo: |
Several environmental impacts are caused due to the extraction of natural resources, low levels of reuse of waste and the high rate of irregular disposal. In this sense, the highlights are Vinyl and Ethylene Acetate (EVA) and Expanded Polystyrene (EPS), popularly known as Isopor®, which have difficulties and limitations in relation to the proper final destination, mainly due to their large volume and low density. On the other hand, these residues become alternatives in the substitution of coarse aggregate in civil construction for the production of lightweight concrete without a structural function. Thus, in this work, molded concrete specimens were produced from the replacement of part of conventional aggregate with light aggregate obtained through EPS and EVA residues mixed together in the final proportions of 60% and 70%. In addition, the influence of pre-hydration was compared with non-prehydration. It was found that for water absorption parameters and voids index, the higher the percentage of light aggregate replaced and pre-hydrated, the higher the indexes, while lower values for specific mass and compressive strength occurred. The results of the compressive strength tests demonstrate that from the statistical analysis using the Tukey test (p <0.05), it is concluded that the 60% volumetric trace of EPS and EVA residues together without prior hydration, obtained a significant difference when compared to other strokes containing light aggregate, reaching 6.21 MPa in the compressive strength test and resulted in the most recommended volumetric trace, among those evaluated, for use in non¬structural lightweight concrete alloy. Economic feasibility studies of the process are recommended, so that the lightweight concrete produced from the line recommended in this study can be used, for example, on sidewalks, sub¬floors, coatings, and sound insulation, as long as they do not have structural functions. |
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