New advances in the carbonation of aluminous cement. Alkaline hydrolisis

Abstract

The carbonation process of aluminous cement in presence of high alkali content is studied. In this work, the formation of a compound which formula is close to K4 Al6(COy)11-x (OH)2x(H2O)y s shown for the studies samples. The aluminous cement carbonation in alkali presence take place, at least, in two stages. In a first stage the aluminium and potassium carbonate hydrate joint to CaCO3 is formed. Later, that aluminium potassium carbonate hydrate is developed toward the aluminium hydroxide formation.