Abstract
This study deals with the porous refractories based on alkali activated chamotte with addition of aluminium scrap recycling waste as a pore forming agent and firebrick sawing residues as a heat resistant filler for the application in temperature up to 850°C. These newly developed porous lightweight materials can be potentially used in the industrial field, since they display good thermal insulation, density range from 541 to 618 kg/m3 and resistance to elevated temperatures (material shrinkage at the temperature of 850°C did not exceed 0.05%). The refractoriness of alkali activated materials was studied by differential thermal analysis (DTA/TG) and dilatometry tests. Pore microstructure was examined by SEM. Mineralogical composition of the raw materials and physical properties of the produced samples were determined.
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