MECHANISM OF CARBONATION SHRINKAGE OF LIME AND HYDRATED CEMENT

CARBONATION OF HYDRATED LIME COMPACTS PRODUCES SHRINKAGE AND CHANGES IN MECHANICAL PROPERTIES COMPARABLE WITH THOSE FOUND IN SIMILARLY TREATED COMPACTS OF BOTTLE-HYDRATED CEMENT AND SAMPLES OF HARDENED PORTLAND CEMENT PASTE. FROM EXPERIMENTAL RESULTS OBTAINED WITH THE SIMPLER LIME SYSTEM, A MECHANISM FOR CARBONATION SHRINKAGE IS PROPOSED THAT POSTULATES A THROUGH-SOLUTION REACTION AND INDUCED CYCLES OF WETTING AND DRYING. EXPERIMENTS ON COMPACTS OF BOTTLE- HYDRATED CEMENT SHOW CARBONATION OF THE COMBINED LIME IS AT LEAST AS RAPID AND EXTENSIVE AS THE CARBONATION OF THE FREE LIME, AND THAT CONTRARY TO CURRENT OPINION THE FORMER REACTION RESULTS IN EVEN GREATER CARBONATION SHRINKAGE. THE MECHANISM FOR CARBONATION SHRINKAGE OF THIS SYSTEM IS CONSIDERED TO BE CONNECTED WITH DEHYDRATION AND POLYMERISATION OF THE HYDROUS SILICA PRODUCT OF CARBONATION. /AUTHOR/

  • Supplemental Notes:
    • Vol 18, No 4, PP 111-117
  • Authors:
    • Swenson, E G
    • Sereda, P J
  • Publication Date: 1968-4

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  • Accession Number: 00212612
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 24 1994 12:00AM