CHARACTERIZATION OF CLAY BRICK INCORPORATED WITH ASH FROM THE INCINERATION OF URBAN GARBAGE

摘要

This work has as its objective to characterize and to incorporate into a clay brick a type of waste, fly-ash, from the incinerator of urban waste. The waste was submitted to mineralogical, physical and chemical characterization. Formulations were prepared with incorporation of the waste up to 10 wt.% into the clayey ceramic body. Rectangular specimens were prepared by uniaxial mold-press at 20 MPa and then fired in a laboratory furnace at 900℃. The physical and mechanical properties evaluated were: plasticity, linear shrinkage, water absorption and fiexural rupture strength. The results showed that the waste is predominantly composed of quartz and calcium compounds. Although, the use of the waste has enhanced the water absorption of the clayey ceramic, it is suggested to incorporate amount around 5 wt.% to avoid deleterious effect in the mechanical strength.