SULFATE-BEARING PHASES IN STEAM-CURED CEMENT PASTES

CEMENT AND CEMENT-POZZOLAN PASTES CONTAINING ADDED GYPSUM ABOVE CERTAIN AMOUNTS, AND CURED AT TEMPERATURES ABOVE 120 DEGREES C., CONTAINED BOTH ANHYDRITE AND A SULFATE-BEARING APATITE MINERAL, ELLESTADITE. HYDROGARNET, WHEN PRESENT, MIGHT ALSO OCCUR IN A SULFATE-SUBSTITUTED FORM AS SUGGESTED BY VARIATION IN UNIT CELL DIMENSIONS. THE THIN SURFACE DEPOSIT ON TYPE I CEMENT PASTE EXPOSED TO CONCENTRATED SEA WATER AT 121 DEGREES CONTAINED MAGNESIUM HYDROXY SULFATE HYDRATE AS A MAJOR PRODUCT. TOBERMITE (11A) CONTAINED LATTICE SUBSTITUTED SULFATE, WHICH AMOUNTED TO 1.6% IN REFERENCE SPECIMENS PREPARED AT 175 DEGREES C. ETTRINGITE OR "MONOSULFATE" WAS NOT DETECTED.

  • Supplemental Notes:
    • Vol 48, No 5, PP 586-589, 4 FIG, 1 TAB, 2 PHOT
  • Authors:
    • Benton, E J
    • Kalousek, G L
  • Publication Date: 1969-5

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Filing Info

  • Accession Number: 00213415
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 24 1994 12:00AM