SYINERGISTIC ROLES OF SLAG AND SILICA FUME IN VERY HIGH-STRENGTH CONCRETE

A study was made of the microstructure of concrete in order to examine the characteristics of hydration progressing from 1 to 28 days. The microstructural changes occurring during this period are discussed. A very high-strength concrete (10% silica fume and 30% slag for cement replacement, HRWRA (high-range water-reducing admixtures), W/C = 0.20) was found to attain 94 MPa compressive strength at 28 days. The process of silica fume dissolution appears to begin early, within 1 day, and it is followed by the formation of a silica-rich gel at 7 days, and a final transformation into dense C-S-H (calcium-silicate-hydrate) within 28 days. Other study findings are also discussed.

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  • Corporate Authors:

    American Society for Testing and Materials (ASTM)

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  United States  19428-2957
  • Authors:
    • Sarkar, S
    • Aitcin, P-C
    • Djellouli, H
  • Publication Date: 1990

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Filing Info

  • Accession Number: 00496196
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 31 1990 12:00AM