This work has for objective to evaluate the incorporation of grog, obtained from wastes of bricks fired at low temperatures, in a red ceramic body aiming at the production of roofing tiles. Initially the grog was chemical, physical and mineralogical characterized. Extruded samples were prepared for firing in an industrial furnace at 970 °C. The technological properties evaluated were: linear shrinkage, water absorption and flexural rupture strength. The microstructure of fired samples was evaluated by pore-size distribution and scanning electron microscopy. The results showed that grog addition enhanced the drying parameters of the ceramic. After firing, the porosity practically did not changed with grog addition. This indicates that the firing of grog at temperatures above the one it was obtained makes possible its own sintering and does not introduce negative changes in the microstructure of the fired ceramics.
red ceramic; grog; microstructure; processing; properties
