Thermodynamic modeling of the CaO-SiO2-CaCO3-H2O closed and open system at 25ºC
DOI:
https://doi.org/10.3989/mc.2003.v53.i270.272Keywords:
cement, carbonation, thermodynamic modelingAbstract
This paper reports on a thermodynamic calculation-based study of the CaO-SiO2-CaCO3-H2O closed system at 25 °C, conducted to determine the range of carbonate ion concentrations at which each phase of the system is stable. Portlandite (CH) and the CSH gel were found to be stable for carbonate ion concentrations of less than or equal to 7.62 X 10-3 mM/kg and 1.62 x 10-2 mM/kg, respectively. The CSH gel was found to remain stable in the system at pH values ranging from 10.18 to 10.48. In the CaO-SiO2-H2O open system at 25 °C, likewise studied, with PCO2 held constant at atmospheric values, only hydrated silica (SH) and calcite were found to be stable.
Downloads
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2003 Consejo Superior de Investigaciones Científicas (CSIC)

This work is licensed under a Creative Commons Attribution 4.0 International License.
© CSIC. Manuscripts published in both the print and online versions of this journal are the property of the Consejo Superior de Investigaciones Científicas, and quoting this source is a requirement for any partial or full reproduction.
All contents of this electronic edition, except where otherwise noted, are distributed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence. You may read the basic information and the legal text of the licence. The indication of the CC BY 4.0 licence must be expressly stated in this way when necessary.
Self-archiving in repositories, personal webpages or similar, of any version other than the final version of the work produced by the publisher, is not allowed.