Uso del residuo industrial yeso rojo como sustituto del yeso natural para la fabricación de cementos comerciales
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Abstract
El objetivo de esta investigación ha sido analizar la valorización
de un residuo generado en el proceso de producción
de dióxido de titanio (vía sulfato), denominado
yeso rojo, en la producción de cementos. Dicho residuo
está compuesto fundamentalmente por sulfato de calcio
di-hidratado e hidróxidos de hierro. Para ello, ha sido necesaria
la caracterización físico-química del yeso rojo,
así como la de los otros componentes fundamentales en
la fabricación de cementos y de los cementos generados
con el mencionado residuo. Además, en el caso del yeso
rojo, se ha analizado su contenido radiactivo al generarse
éste en una industria NORM (Natural Occurring Radioactive
Materials).
Posteriormente, se han estudiado las propiedades más
importantes de los cementos producidos con diferentes
porcentajes de yeso rojo añadido, comparando estas
mezclas con las propiedades de un cemento Portland
comercial, comprobándose que se cumplen todas las
normas europeas de calidad exigibles.
The main objective of this research has been the valorisation of a waste from the TiO2 production process (sulphate method), called red gypsum, in the production of cements. This waste is mainly formed by di-hydrate calcium sulphate and iron hydroxides. To cover this objective it has been necessary to perform the physicochemical characterisation of the red gypsum as well as the main components in the production of cements and of the new cements generated. Moreover, for the red gypsum, has been analyzed its radioactive content because it is generated in a NORM (Naturally Occurring Radioactive Materials) industry. Finally, the most important properties of the obtained cements with different proportions of red gypsum in their composition have been studied by comparing them with the standard ones obtained in a Portland cement. Lastly, we have demonstrated that the new cements fulfil all the quality tests imposed by the European legislation.
The main objective of this research has been the valorisation of a waste from the TiO2 production process (sulphate method), called red gypsum, in the production of cements. This waste is mainly formed by di-hydrate calcium sulphate and iron hydroxides. To cover this objective it has been necessary to perform the physicochemical characterisation of the red gypsum as well as the main components in the production of cements and of the new cements generated. Moreover, for the red gypsum, has been analyzed its radioactive content because it is generated in a NORM (Naturally Occurring Radioactive Materials) industry. Finally, the most important properties of the obtained cements with different proportions of red gypsum in their composition have been studied by comparing them with the standard ones obtained in a Portland cement. Lastly, we have demonstrated that the new cements fulfil all the quality tests imposed by the European legislation.
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Bibliographic citation
Gázquez, M.J., Bolívar Raya, J.P., Vaca Galán, F., García-Tenorio, R., Mena Nieto, A.I.: "Uso del residuo industrial yeso rojo como sustituto del yeso natural
para la fabricación de cementos comerciales". Materiales de Construcción Vol. 62, 306, págs. 183-198, (2012). DOI: 10.3989/mc.2011.63910
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