EM - Escola de Minas

URI permanente desta comunidadehttp://www.hml.repositorio.ufop.br/handle/123456789/6

Notícias

A Escola de Minas de Ouro Preto foi fundada pelo cientista Claude Henri Gorceix e inaugurada em 12 de outubro de 1876.

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Autor: search.filters.author.Dębska, BernardetaAssunto: search.filters.subject.Epoxy mortars

Resultados da Pesquisa

Agora exibindo 1 - 2 de 2
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    Assessment of the mechanical parameters of resin composites with the addition of various types of fibres.
    (2020) Dębska, Bernardeta; Lichołai, Lech; Silva, Guilherme Jorge Brigolini; Caetano, Marina Altoé
    The article describes tests of epoxy mortars after the addition of fibres. The fibres were a substitute for sand in the amount of 0, 1, 2, 3, 4 and 5% by volume, respectively. Three types of mortar were obtained, containing polypropylene, glass and carbon fibres, respectively. Statistical analyses (ANOVA) were carried out to assess the impact of fibre content on the mechanical properties of mortars. Brittle fracture toughness was also tested using the Cracked Straight Through Brazilian Disc method. The addition of each type of fibre improved the assessed parameters. Based on the obtained research results, and also due to availability and price, the most advantageous seems to be the production of composites containing the addition of polypropylene fibres.
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    Effects of waste glass as aggregate on the properties of resin composites.
    (2020) Dębska, Bernardeta; Lichołai, Lech; Silva, Guilherme Jorge Brigolini
    The article describes tests of epoxy mortars containing waste glass, which was a substitute for sand in an amount of 0 to 100% by weight. The application of the method of planning the experiment using a central composition plan enabled the obtaining of full information about the effect of the modifier and the amount of resin on the mortar properties. Thanks to the use of the general function optimization method, a mortar composition was also determined that allows the obtaining of the most favourable values simultaneously for all determined parameters. The obtained mortars containing waste glass have very high flexural strength values at the level of 22.55–27.73 MPa and compressive strength in the range from 68.67 MPa to 96.65 MPa as well as absorbability below 0.73%. The analyses and conclusions were confirmed from the structural point of view by SEM micrographs.