REVIEW OF ETTRINGITE-MONOPHASE RELATIONSHIPS IN PORTLAND CEMENT SYSTEMS

The stability domain of stoichiometrically prepared ettringite and monosulfate hydrate in water at 30 and 100 degrees C also in the presence of lime, alite, monocarboaluminate hydrate, or each other is reported. The formation conditions of both calcium sulfoaluminate hydrates in pure ordinary portland cement dealing mainly with the hydration behavior of the tricalcium aluminate and the tetracalcium aluminoferrite in the presence of gypsum, also of lime, alite, or each other at 30 degrees C is summarized. The type of hydrate formed in sodium -hydroxide, -sulfate solution or as a result of alkali doping in the structure of the anhydrous phase is given. The ettringite/monophase formation and duration in three stages of C(3)A and C(4)AF hydration (instantaneous reaction, dormant, and acceleration period, are described. The present review focused on the stability of the calcium sulfoaluminate hydrates is a summary of 13 publications.

• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Ghorab, H Y
• Publication Date: 1999

Language

• English

Media Info

• Features: References; Tables;
• Pagination: p. 65-79
• Monograph Title: ETTRINGITE--THE SOMETIMES HOST OF DESTRUCTION

Subject/Index Terms

• TRT Terms: Calcium; Ettringite; Hydration; Lime cement; Portland cement; Sodium hydroxide; Sodium sulfate; Stability analysis; Temperature
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00779857
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 20 1999 12:00AM