Caracterização de argilas empregadas na produção de cerâmica vermelha na cidade de Santarém-Pa
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2017-03-17Autor
http://lattes.cnpq.br/6014742568088094
SILVA, Emanuelle Bentes da
SILVA, Gerciane Santos da
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In the Western Region of Pará there are several industries of red ceramics that fit the national
scenario where the productive process is based on empirical knowledge. However, the demand
for these products, mainly for civil construction, requires more resistant and with competitive
price for the ceramic products, requirements that can be reached with the scientific knowledge
of the raw material which would result in optimized formulations of the ceramic masses,
possible aggregations of other low-cost raw materials, with better results, and reduction of
losses in the production process. The present paper deals with the characterization of clays used
as raw materials for small industries producing blocks and ceramic tiles, using X-ray diffraction
(XRD), infrared spectroscopy (FTIR) and Atterberg limits. In this case, the limits of liquidity
and plasticity and plasticity index were evaluated. For all the samples, the XRD technique
allowed to identify the main mineralogical phases and common to the clays used by the
industries of red ceramics. The mineral phases identified were: quartz, kaolinite, ilite / mica,
goethite, anatase, vermiculite and muscovite. The analysis through FTIR was complementary
to the XRD results, and it is possible to identify absorption bands characteristic of some clay
minerals identified in X-ray diffraction analyses. The results obtained by Atterberg limits,
finding limits of liquidity and plasticity and plasticity index, in percentage, for all clay samples,
got a reasonable satisfaction of minimum molding and extrusion requirements in the red
ceramic industries.