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.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/3528769
• 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

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 32-37
• Serial:
  • Cement, Concrete and Aggregates
  • Volume: 12
  • Issue Number: 1
  • Publisher: American Society for Testing and Materials (ASTM)
  • ISSN: 0149-6123
  • Serial URL: http://journalsip.astm.org/JOURNALS/CEMENT/cca_home.html

Subject/Index Terms

• TRT Terms: Calcium silicate; High strength concrete; Hydration; Microstructure; Silica fume; Slag; Synergism (Ecology); Water reducing agents
• Old TRIS Terms: Synergistic
• Subject Areas: Environment; Highways; Materials; I32: Concrete;

Filing Info

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