COMPORTAMENTO MECÂNICO DO CONCRETO COM ADIÇÃO DE FIBRA DE AÇO VISANDO APLICAÇÃO EM PAVIMENTOS
COMPORTAMENTO MECÂNICO DO CONCRETO COM ADIÇÃO DE FIBRA DE AÇO VISANDO APLICAÇÃO EM PAVIMENTOS
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DOI: https://doi.org/10.22533/at.ed.5632402024
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Palavras-chave: Fibras; Adição; Concreto; Pavimentos
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Keywords: Fibers; Addition; Concrete; Pavements
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Abstract: One of the possibilities for increasing the percentage of paved roads in Brazil is concrete paving. Despite its high initial cost and low tensile strength, it has a longer service life compared to asphalt paving, consequently allowing a greater reach in the road percentage. In addition, the addition of materials to concrete, such as fibers, allows the improvement of the mechanical properties of the material. Thus, this work aimed to evaluate the influence of the addition of steel fibers on the mechanical behavior of concrete for pavements. In the laboratory, the physical characterization of the materials used in the research was carried out, namely, the coarse aggregate, the fine aggregate and CP IV cement. A commercial steel fiber was used. Three distinct traces were elaborated, being a reference trace, one with the addition of 10% of steel fibers in relation to the cement and one with the addition of 20% of steel fibers in relation to the cement. The evaluation of the mechanical behavior of the concrete with the addition of fibers was carried out through the tests of simple compression strength and flexural tensile strength and the curing time for all samples was 28 days. After the completion of the ruptures of the samples, it was not possible to identify an expressive difference between the additions, but satisfactorily the results of the additions in the two strengths were significant, reaching increases of 25.33% in the simple compression strength and 15.07% in the flexural tensile strength. Therefore, it was possible to conclude that the addition of fibers, in this case steel fiber, is a good alternative to improve the mechanical properties of concrete for pavements, resulting in structures with greater strength.
- Eduarda Lemos Rodrigues
- Lucas Eduardo Dornelles
- Victória Nunes Ramos
- Silvio Lisboa Schuster