Materiales de Construcción, Vol 53, No 270 (2003)

Obtaining a sulfoaluminate belite cement by industrial waste


https://doi.org/10.3989/mc.2003.v53.i270.278

I. Elkhadiri
Laboratoire de Chimie du Solide Appliquée, Laboratoire Associé Francophone 501, Faculté des Sciences Université Mohammed V, Marruecos, Morocco

A. Diouri
Laboratoire de Chimie du Solide Appliquée, Laboratoire Associé Francophone 501, Faculté des Sciences Université Mohammed V, Marruecos, Morocco

A. Boukhari
Laboratoire de Chimie du Solide Appliquée, Laboratoire Associé Francophone 501, Faculté des Sciences Université Mohammed V, Marruecos, Morocco

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

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

Abstract


Sulfoaluminate belite clinkers by burning raw at moderate temperatures near 1250 °C were synthesized. The used mixtures were made by calcium carbonate blended to two industrial wastes: low calcium fly ash and phosphogypsum. The clinkers were characterised by X-Ray Diffraction (XRD), Infrared Spectroscopy (FTIR) and free lime. The hydraulic behaviour of the obtained cements, by adequate clinkers with 7% of added gypsum, was followed by XRD, scaning electronic microscopy (SEM), FTIR and NMR.

Keywords


sulfoaluminate belite clinkers; fly ash; phosphogypsum; hydratation

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