THE PROPERTIES OF CEMENTS CONTAINING FLY ASH TOGETHER WITH OTHER ADMIXTURES

The admixtures of condensed silica fumes (csf) and phosphogypsum were used together with fly ashes as blended cement components to improve the early strength and other properties. The standard tests at normal curing were made as well as the measurements after the low pressure steam treatment at 70 deg C. All cements mixed with CSF showed the standard compressive strengths about 13-20 MPa higher than the reference mortars. More detailed studies of the hardening process were also carried out. the reduction of total porosity and pore size was also found. The same positive effect of CSF was observed in the case of mortars treated at 70 deg C. This additive improves significantly the pozzolanic properties of low-calcium PFA. Study results relating to the pastes and mortars have been confirmed for concretes. It is concluded that the admixtures studied, particularly CSF, have a positive influence on the properties of PFA concretes and help to augment the effect of PFA content in these concretes.

• Corporate Authors:

  American Concrete Institute

  P.O. Box 19150, Redford Station, 22400 Seven Mile Road
  Detroit, MI  United States  48219
• Authors:
  • Giergiczny, Z
• Conference:
  • Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete. Fourth International Conference
  • Location: Istanbul, Turkey
  • Date: 1992-5-3 to 1992-5-8
• Publication Date: 1992

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 439-456
• Serial:
  • Volume: 1

Subject/Index Terms

• TRT Terms: Admixtures; Cement; Compressive strength; Concrete curing; Concrete hardening; Fly ash; Hardness; Mortar; Pozzolanic action; Silica fume
• Old TRIS Terms: Condensed silica fume
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00624315
• Record Type: Publication
• Report/Paper Numbers: SP-132
• Files: TRIS
• Created Date: Oct 13 1993 12:00AM