| The investigation was carried out to incorporate newly
tapped Rajpardi clay, an overburden material of a lignite
mine on replacements of extensively used traditional plastic
clays like Than and Bikaner in the earthenware type glazed
wall tile body composition. Test specimens of five different
body compositions incorporating Rajpardi clay were
prepared and fired at four different test temperatures, viz.
950", 1050", 1100" and 1150"C in an electrical furnace. Dry
and fired properties like dry shrinkage, dry MOR, fired
shrinkage, fired MOR, percent apparent porosity, percent
water absorption, bulk density etc were determined and
compared with those of the specimens of a traditional
earthenware tile body used as a standard composition.
It was observed that the incorporation of Rajpardi clay
in the tune of 25 wt% was the optimum condition in
achieving the requisite thermo-mechanical properties in wall
tile body. A significant increase in the values of dry and
fired MOR, as compared to those of the standard
composition, was also noticed. |
