Development and Verification of a New Method to Determine the Available Alkali in Pozzolan (Fly Ash) or Ground Granular Blast Furnace Slag (GGBFS)

The available alklali test was performed at the standard temperature of 100 degrees F per ASTM C-311, and at 125 degrees F. The pozzolans tested at the higher temperature produced greater sodium and potassium solubility. The 100 degree F curve approached the 125 degree F curve of solubility vs. time asymptotically at later times. For ground granular blast furnace slags (GGBFS), solubility seemed more rapid, possibly due to fineness. Results for GGBFS show that the test of available alkalis might have been done in 14 days at 125 degrees F due to rapid solubility at the higher temperature.

• Corporate Authors:

  Rhode Island Department of Transportation

  Materials Section
  Two Capitol Hill
  Providence, RI  United States  02903

  Rhode Island Department of Transportation

  Research and Technology Development
  Two Capitol Hill
  Providence, RI  United States  02903

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Foisey, Michael J
  • Ringgold, William Aron
• Publication Date: 2007-9

Language

• English

Media Info

• Media Type: Print
• Edition: Final Report
• Features: Appendices; Figures; References; Tables;
• Pagination: 40p

Subject/Index Terms

• TRT Terms: Alkali; Fly ash; Potassium; Pozzolan; Slag; Sodium; Solubility; Temperature; Time
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01088793
• Record Type: Publication
• Report/Paper Numbers: FHWA-RIDOT-RTD-07-3
• Contract Numbers: SPR-229-2274
• Files: TRIS, USDOT, STATEDOT
• Created Date: Feb 25 2008 2:36PM