Carbonation on ternary cement systems

All of RECERCAT

To access the full text documents, please follow this link: http://hdl.handle.net/2117/14134

Title:	Carbonation on ternary cement systems
Author:	Martínez Ramírez, Sagrario; Fernández Carrasco, Lucía
Other authors:	Universitat Politècnica de Catalunya. Departament de Construccions Arquitectòniques I; Universitat Politècnica de Catalunya. LiTA - Laboratori d'Innovació i Tecnologia en l'Arquitectura
Abstract:	The main hydration reaction product in the ternary system fly ash, calcium sulphate and calcium aluminate cement (40/20/40) at 20°C is a hydrated calcium sulfoaluminate compound, an AFt phase slightly different from “traditional ettringite”. The carbonation of ettringite develops gypsum but in this case rapidcreekite is formed. For the first time it has been observed that carbonation of the mentioned calcium sulfoaluminate compound (AFt), an hydrated calcium sulphate carbonated phase (Ca2(SO4)(CO3)·4H2O) is formed with the replacement of an SO4 row in a (0 4 0) layer of the gypsum by CO3 groups. The developed carbonated phase has been studied and analyzed through XRD, FTIR, Raman spectroscopy, and scanning electron microscopy.
Abstract:	Peer Reviewed
Subject(s):	-Àrees temàtiques de la UPC::Edificació::Materials de construcció -Concrete--Deterioration -Ciment -- Deterioració
Rights:
Document type:	Article - Published version Article
Share: