Materiales de Construcción, Vol 49, No 253 (1999)

New advances in the carbonation of aluminous cement. Alkaline hydrolisis


https://doi.org/10.3989/mc.1999.v49.i253.457

L. Fernández-Carrasco
Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC), Spain

F. Puertas
Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC), Spain

M. T. Blanco-Varela
Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC), Spain

T. Vázquez
Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC), Spain

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 K4Al6(CO3)11-x(OH)2x(H2O)y is 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.

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