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

Subject/Index Terms

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