Abstract
In the welding process large amounts of waste are discarded. This waste is usually deposited in landfills. This paper reports on the incorporation of the welding flux slag waste into clay bricks for civil construction. The waste was characterized with respect to crystalline phases present, chemical composition, morphology, and particle size. Clay-waste powder mixtures containing up to 10-wt. % of welding flux slag waste were prepared, pressed and fired at temperatures between 850 oC and 1050 oC. The effects of the waste incorporation and firing temperature on properties such as linear shrinkage, water absorption, apparent density, and flexural strength have been determined. The microstructure of the fired pieces was evaluated by SEM. The results showed that the waste incorporated pieces fulfill the specifications required for use in clay bricks at all firing temperatures.
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