ENHANCING THE PROPERTIES OF GRANITE BASED COMPOSITES BY THE INCLUSION OF WASTE GLASS AND BONE ASH FOR THE PRODUCTION OF SELF-GLAZED CERAMICS

Adele Dzikwi Garkida, Dikko Zauro Tukur

Abstract


Granite and ball clay in the ratios of 80-20 and 70-30 percent produced clay bodies that are described as self glazed bodies. These are bodies that melt and shine on their own without glaze application. The major drawback of these bodies is their inability to produce free standing forms due to poor tensile strength. This research aims at synergizing bone ash, waste glass and granite based composites with a view of improving the strength of this body for the production of free standing self glazed ceramics. Granite /Clay 70%, Bone Ash 20% and Waste glass 10%, constitutes batch A. While Granite/Clay 70%, Bone Ash 20% and Waste glass 10%constitutes batch B. Granite/Ball clay70%Bone Ash 20% and Waste glass 10% Constitute batch C.Granite/Ball Clay 60%Bone Ash30% Waste Glass 10% represented batch D.These compositions were found suitable for the production of free standing ceramic wares through the casting method of production. The forms produced were fired to 1250 degrees centigrade. Results showed an improvement in the ware hardness at green and fired stages. Products fully vitrified with a corresponding increase in tensile strength which enabled the ware to stand without collapsing. An improved shine on the surface of the wares was also achieved. Based on these results, it was found out that the inclusion of waste glass and bone ash into the granite based composites yielded the desired properties needed for the production of self glazed ceramics.


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