Abstract
The aim of this work is to study the possibility to use crockery ware scrap in floor tile engobe formulations. The scrap powder was added to engobe formulation in substitution of china clay and its influence on slip properties like density and fluidity was studied. Fired properties such as whiteness and thermal expansion were determined. The effect of these engobes on the fired properties of matt glazed floor tiles was also evaluated. Incorporation of 5-10wt. % scrap resulted in significant improvement in fluidity. Coefficient of thermal expansion was found to be increased slightly and no detrimental effect was observed in whiteness as well as in maturity of engobes. Fired glazed tiles do not show any defect in appearance and exhibit good glaze to body fit. Thus, this study demonstrates the possibility to reuse waste materials like crockery ware scrap in engobe formulations which have a well defined role in glazed floor tile manufacturing.
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