THE INFLUENCE OF SULPHATES ON THE POZZOLANIC CHARACTERISTICS OF SILICOALUMINOUS FLY-ASH FROM A POWER STATION

A STUDY IS MADE OF THE BEHAVIOR OF A SILICOALUMINOUS FLY-ASH IN CONTACT WITH PURE WATER, LIME-SATURATED WATER AND PORTLAND CEMENT-SATURATED WATER. IN PURE WATER, THE ASH RELEASES ALKALINE AND CALCIUM VERY RAPIDLY IN THE FORM OF SULPHATES. THESE SULPHATES PLAY A VERY IMPORTANT ROLE IN THE EVOLUTION OF THE ASH IN CONTACT WITH LIME-SATURATED WATER. IN THEIR PRESENCE, ETTRINGITE THEN TOBERMORITE ARE FORMED; IF THEY ARE ABSENT, TOBERMORITE ONLY IS FORMED. IN CONTACT WITH CEMENT-SATURATED WATER WHICH CONTAINS SULPHATE AND LIME, ETTRINGITE IS FORMED. /TRRL/

• Authors:
  • Vaquier, A
  • CARLES-GIBERGUES, A
• Publication Date: 1970-11

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 331-7
• Serial:
  • Rev Matls Constr & Trav Publics /Fr/ Chemical Abstracts
  • Issue Number: 662

Subject/Index Terms

• TRT Terms: Alumina; Calcium oxide; Ettringite; Fly ash; Portland cement; Sulfates; Tobermorite; Water
• Old TRIS Terms: Alumina silicates
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213152
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: TRIS
• Created Date: Dec 4 1973 12:00AM