Investigation of the CaO–Al2O3–SiO2–CaSO4–CaCO3–H2O system at 25°C by thermodynamic calculation-Reference-Cited by-同舟云学术

Investigation of the CaO–Al2O3–SiO2–CaSO4–CaCO3–H2O system at 25°C by thermodynamic calculation

Published:2004-04 Issue:2 Volume:16 Page:69-76
ISSN:0951-7197
Container-title:Advances in Cement Research
language:en
Short-container-title:Advances in Cement Research

Author:

Damidot D.¹,Barnett S. J.²,Glasser F. P.³,Macphee D. E.³

Affiliation:

1. Ecole des Mines de Douai, Civil Engineering Department, 59000 Douai, France.

2. Department of Civil Engineering, University of Liverpool, Liverpool L69 3GQ, UK.

3. Department of Chemistry, University of Aberdeen, Aberdeen AB9 2UE, Scotland, UK.

Abstract

The phase diagram of the CaO–Al2O3–SiO2–CaSO4–CaCO3–H2O system relevant to cement has been calculated at 25°C and 1 bar pressure. It is composed of 331 stable phase assemblages in equilibrium with the aqueous phase and contains 30 invariant points with 15 solids. Thaumasite appears to be a stable phase with a wide stability domain. Compared to ettringite, thaumasite is stable to lower pH and generally demands higher sulphate concentrations to be stable.

Publisher

Thomas Telford Ltd.

Subject

General Materials Science,Building and Construction

Link

https://www.icevirtuallibrary.com/doi/pdf/10.1680/adcr.2004.16.2.69

Reference14 articles.

1. The formation of thaumasite in a cement:lime:sand mortar exposed to cold magnesium and potassium sulfate solutions

2. Evidence of thaumasite formation in Southern California concrete

3. Thermodynamic investigation of the CaOAl2O3CaSO4H2O system at 25°C and the influence of Na2O

4. Thermodynamic investigation of the CaOAl2O3CaCO3H2O closed system at 25°C and the influence of Na2O

5. Modelling the impact of abundant geochemical components on phase stability and solubility of the CaO—SiO2—H2O system at 25°C: Na+, K+, SO42-, Cl- and CO32 -

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