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.
Navegar
2 resultados
Resultados da Pesquisa
Item Mechanical properties and microstructure of epoxy mortars made with polyethylene and poly(Ethylene Terephthalate) waste.(2021) Dębska, Bernardeta; Silva, Guilherme Jorge BrigoliniThe article describes the results of a study to determine the simultaneous effect of polyethy- lene terephthalate waste (PET) and polyethylene (PE) on the strength characteristics and bulk density of epoxy mortars. In these mortars, 9 wt.% of the polymer binder was replaced by glycolysate which was made from PET waste and propylene glycol. Additionally, 0–10 vol.% of the aggregate was substituted with PE agglomerate made from plastic bags waste, respectively. The modification of the composition of epoxy mortar has a special environmental and economic aspect. It also allows to protect natural sources of the aggregate, while reducing the amount of waste and reducing problems arising from the need to store them. The resulting composite has very good strength properties. With the substitution of 9 wt.% of resin and 5 vol.% of sand, a flexural strength of 35.7 MPa and a compressive strength of 101.1 MPa was obtained. The results of the microstructure study of the obtained mortars constitute a significant part of the paper.Item Effects of waste glass as aggregate on the properties of resin composites.(2020) Dębska, Bernardeta; Lichołai, Lech; Silva, Guilherme Jorge BrigoliniThe 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.