Abstract
Abstract The solidification of highly alkaline, generally semi-liquid red waste and gray slag from the aluminum production inhibits toxic properties. The chemical and mineralogical compositions of waste materials were determined and both materials were transformed to the solids (compact and foamed materials) through the geopolymer technology. The described method of solidification distinguishes by the inhibition of waste alkalinity, lowering the waste hazardous effect. The resulting solids have sufficient mechanical properties and do not produce any hazardous gasses when heated. The presented work studies the solidification of waste materials from aluminum production and results inform about insulating properties of products when both waste types are reacting with geopolymer precursors.
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