FALSE SET OF CEMENT AS INFLUENCED BY HYDROZYLATED CARBOXYLIC-ACID-TYPE ADMIXTURE

FIELD EXPERIENCE WITH A PARTICULAR PORTLAND CEMENT SHOWED THAT THE CONCRETE MADE WITH THIS CEMENT DEVELOPED CRUSTING ON ITS SURFACE WHEN USED WITH A SET RETARDING ADMIXTURE. FALSE SET AND EXTRACTION TESTS WITH THIS CEMENT INDICATED THAT IT CONTAINED CALCIUM SULFATE HEMIHYDRATE AND WAS POTENTIALLY A FALSE-SETTING CEMENT. THE ADDITION OF THE ADMIXTURE DELAYED THE TIME AT WHICH THE FALSE SET DEVELOPED. RESULTS OF TESTS MADE WITH SILICA FLOUR-HEMIHYDRATE, WATER PASTES AND CLINKER-CALCIUM CHLORIDE WATER SLURRIES PROVIDE EVIDENCE THAT THE ADMIXTURE RETARDS BOTH THE RATE OF CALCIUM SULFOALUMINATE FORMATION IN A CEMENT PASTE AND THE RATE AT WHICH GYPSUM CRYSTALLIZES FROM PASTES THAT ARE SUPERSATURATED WITH RESPECT TO GYPSUM. /AUTHOR/

  • Supplemental Notes:
    • Vol 7,no 6,PP 246-250
  • Authors:
    • Goetz, H W
  • Publication Date: 1966-6

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00212424
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 17 1994 12:00AM