Incorporation of quartzite residues in ceramic mass for porcelain tile production

Reference	Presenter	Authors (Institution)	Abstract
16-006	Karina Ruiz Silva	Silva, K.R.(Federal University of Campina Grande); Campos, L.F.(Federal University of Paraiba); Santana, L.N.(Federal University of Campina Grande);	The generation of residues from the extraction and processing of rocks is a problem that challenges the scientific community to find applications for them. In this context, the main objective of this work was to evaluate the potentiality of the use of quartzite residues, as a non-plastic raw material, in the composition of an industrial ceramic mass for porcelain tile production. The raw materials were characterized by X-ray fluorescence, X-ray diffraction, thermogravimetry, differential thermal analysis and particle size analysis by laser diffraction. Subsequently, central composite design was used to analyze the effects of the independent variables: firing temperature (1143; 1160; 1200; 1240 and 1257ºC) and residue content (1.76; 3; 6; 9 and 10.24%) on the physical-mechanical properties of the material. The samples were submitted for tests of linear shrinkage, water absorption, apparent porosity and flexural strength at three points. The firing temperature had a statistically significant effect on the investigated response variables, so that the elevation of its levels contributed to the improvement of the studied properties. On the other hand, the residue content presented a non-significant effect, which means that the incorporation of quartzite residues in ceramic mass did not affect the material properties. In conclusion, the specimens containing quartzite residues, up to 10.24% by weight, and sintered at 1240 and 1257ºC, fulfil the requirements of the international standard ISO 13006, group BIa, for porcelain tiles.
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