SHRINKAGE OF CONCRETE CONTAINING BLAST FURNACE SLAG

THE ADDITION OF BLAST-FURNACE SLAG TO PORTLAND CEMENT CONCRETE RESULTS IN AN INCREASE IN THE EFFECT OF THE TOBERMORITE AND A DECREASE IN THE RISK OF MICRO-CRACKING DURING DRYING. APPARENT SHRINKAGE IS INCREASED, AND THE INFLUENCE OF INTERNAL WATER LOSS BECOMES MORE APPRECIABLE. THE RELATION BETWEEN SHRINKAGE, LOSS OF WATER AND ENVIRONMENTAL HYGROMETRY IS PRESENTED AS A THREE- DIMENSIONAL GRAPH BASED ON A NUMBER OF EXPERIMENTAL RESULTS. THE MAIN CONCLUSIONS REACHED ARE: (1) HALF OF THE POTENTIAL SHRINKAGE OF CEMENT OCCURS AFTER ADSORPTION OF THE LAST LAYER OF WATER (HYGROMETRY LOWER THAN 0.44). (2) A DISTINCTION MUST BE MADE BETWEEN SHRINKAGE AND CRACKING. THE PRESENCE OF SLAG OR PROLONGED CURING IN WATER CAN INCREASE SHRINKAGE BUT NOT THE RISK OF CRACKING. (3) IN SHRINKAGE TESTS, IT IS NECESSARY TO MEASURE LOSS OF WEIGHT AND TO CONTROL THE ENVIRONMENTAL HYGROMETRY. /LCPC(A)/RRL/

  • Supplemental Notes:
    • Vol 1, No 2-J, 30 PP, 14 FIG, 12 TAB, 7 REF
  • Authors:
    • Mills, R H
  • Publication Date: 1968-3

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Filing Info

  • Accession Number: 00213047
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: May 16 1971 12:00AM