Water chemical potential: A key parameter to determine the thermodynamic stability of some hydrated cement phases in concrete?

The CaO–Al2O3–SO3–H2O system at 25 °C under 1 bar of pressure has been studied with phase diagrams software (Zen + k) based on chemical potentials. The reported invariant points are similar to those obtained previously using equilibrium calculations. However, Zen + k enables the calculation of systems at different relative humidities. In conditions where water is not in excess, calcium monosulfoaluminate could be a stable phase and thus, as observed experimentally, remain for long times in an ordinary Portland cement paste.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Authors:
  • Albert, Blandine
  • Guy, Bernard
  • Damidot, Denis
• Publication Date: 2006-5

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 783-790
• Serial:
  • Cement and Concrete Research
  • Volume: 36
  • Issue Number: 5
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Cement paste; Chemical reactions and processes; Concrete construction; Corrosion; Ettringite; Structural deterioration and defects; Thermodynamics; Water in concrete
• Uncontrolled Terms: Calcium monosulfoaluminate; Relative humidity
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01025066
• Record Type: Publication
• Files: TRIS
• Created Date: May 31 2006 9:29AM