Utilização de resíduo de rochas ornamentais para produção de cerâmica de revestimento
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Data
2017-02-21
Autores
Oliveira, Gabrielly Sandrine de
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Universidade Federal do Espírito Santo
Resumo
Brazil is among the main producers of natural stones. The extraction and processing of granites and marbles generates an enormous quantity of fine waste, from their extraction to the polishing. In this work, the dimension stones waste of diamond multi-wire machine was used in the engobe and glaze for application as a coating ceramic, because it has similar composition and granulometry to clay (basic constituent of these ceramics). After chemical characterization of the dimension stones waste and clay, some additives (fluxes, dyes and stabilizers) were mixed with the waste, and the engobe and enamels were prepared in different proportions. These compositions were tested to coating the ceramics with 30 mm X 30 mm X 5 mm, in the single firing and double firing processing, aiming to obtain more uniform surface and better technological properties. The single firing presented better surface results, being thus reproduced in the base ceramics with 100 mm x 100 mm x 5 mm. These ceramics were analyzed for relative density, shrinkage, water absorption, chemical attack resistance, and abrasion resistance, in according to NBR ABNT 13818 standard. The ceramics after sintering showed some cracks and relative density of approximately 77.8%. The double firing ceramics presented 5.14 ± 0.44% of linear retraction, and the single firing ceramics presented 4.35 ± 0.44%, values close to the literature. The samples were classified as “Class A” for the chemical attack tests, considered as excellent resistance. It can be concluded with wear test that the ceramic coating produced is indicated for residences or areas where it is usually walked with slippers or bare feet, and this ceramic is classified as PEI 1.
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Waste , Dimension stones , Ceramic , Cerâmica de revestimento