A LABORATORY EVALUATION OF LIGNITE FLYASH AS A STABILIZATION ADDITIVE FOR SOILS AND AGGREGATES

A laboratory test program was undertaken to determine the effects of the addition of lignite flyash in lime-soil stabilization. the research program included testing of two cohesive and two relatively cohesionless soils in combination with lime and lignite flyash in various quantities and proportions. Flyashes from Ottertail Power Co and Basin Electric Power Coop were investigated. Compressive strengths were determined for 65 different mixtures with lime content varied from 2% to 7% and lime to flyash ratios ranging from 1:1 to 1:7. The effect of length of curing time on compressive strength was also investigated. Mixtures selected on the basis of the compressive strength test results and economic considerations were subjected to freeze-thaw and wet-dry durability testing. The laboratory investigation results indicate the use of lignite flyash in combination with hydrated lime can result in increased strength and durability for all of the soils tested.

• Supplemental Notes:
  • Prepared in cooperation with Federal Highway Administration, Washington, D.C., and North Dakota State Highway Dept., Bismarck.
• Corporate Authors:

  Twin City Testing and Engineering Laboratory, Inc

  662 Cromwell Avenue
  St Paul, MN  United States  55114

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  North Dakota State Highway Department

  State Highway Building, Capitol Grounds
  Bismarck, ND  United States  58505
• Authors:
  • Dobi, T R
  • Ng, S Y
  • Henning, N E
• Publication Date: 1975-1

Media Info

• Pagination: 176 p.

Subject/Index Terms

• TRT Terms: Calcium oxide; Compressive strength; Concrete curing; Electric power plants; Fly ash; Laboratory tests; Land reclamation; Lignite; Properties of materials; Soil stabilization; Soils; Solid waste disposal
• Uncontrolled Terms: Soil properties
• Old TRIS Terms: Reclamation
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00092090
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: 9-5373 Final Rpt.
• Files: NTIS, TRIS, USDOT, STATEDOT
• Created Date: Oct 18 1976 12:00AM