This work has for objective the development a ceramic body for ceramic paver using kaolinitic clays, argillite and grog. The raw materials were submitted to physical, chemical and mineralogical tests. Cylindrical specimens were uniaxially mold-press and then fired at 850 ºC. The evaluated technological properties were: water absorption, diametral shrinkage and uniaxial compressive strength. The microstructure of the fired ceramics was evaluated by electron scanning microscopy. The results show that the argillite significantly decreased the water absorption and the shrinkage of the clayey body. The grog also decreased the shrinkage, but also decreased the mechanical strength. With respect to the water absorption, the grog did not change this property of the composition elaborated with clays and argillite. The best development formulation is constituted by50 wt.% of clays and 50% by argillite.
ceramic paver; clay; argillite; red ceramic; grog
