Effect of Magnesium and Sulfate Ions on Durability of Silica Fume Blended Mixes Exposed to the Seawater Tidal Zone

Silica fume has been used as a high pozzolanic reactive material to make high-performance concrete for severe conditions. This article reports on a study of the effect of silica fume on deterioration resistance to sulfate attack in seawater within tidal zone and simulated wetting-drying condition in Portland cement concretes and pastes. The concretes and pastes studied contained silica fume (SF) with and without ground granulated blast furnace slag (GGBS). The results showed that the strength change factors (SCFs) of specimens with SF (the more SF content, the higher strength loss) were greater than that of the mixes without SF or cured under tap water. Magnesium sulfate originated attack was found to be the dominating deterioration mechanism, confirmed by X-ray and chemical analyses. The authors note that the incorporation of GGBS with SF mixes in different exposure conditions led to the worst performance in all of the test environments. The authors hypothesize that lower cement content and hydration rate accompanied with particular chemical composition of GGBS made the concrete and paste specimens to be more susceptible to deterioration in a seawater environment.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Authors:
  • Ganjian, Eshmaiel
  • Pouya, Homayoon Sadeghi
• Publication Date: 2005-7

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 1332-1343
• Serial:
  • Cement and Concrete Research
  • Volume: 35
  • Issue Number: 7
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Admixtures; Concrete; Concrete curing; Diffraction; Durability; Electron microscopy; Granulated slag; Portland cement; Seawater; Silica fume; Tides
• Uncontrolled Terms: Strength change; Tidal zone
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01002291
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 22 2005 6:24AM