PERFORMANCE RECORD OF FLY ASH AS A CONSTRUCTION MATERIAL

Three projects in the Kansas City area which involve the use of fly ash as a substitute for conventional soil fill or as an additive to natural soils are described in this paper. In these projects, fly ash was used as lightweight backfill behind a 25-ft high retaining wall; structural fill beneath an oil storage tank; and an additive to highly plastic, residual clay in a road subgrade. The backfill was constructed in stages allowing time for the fly ash to develop strength to take advantage of the known self-hardening properties. The backfill was only lightly compacted using a 2-ft square vibrating plate. The highly plastic clay was modified and stabilized by the addition of self-hardening fly ash. Addition of the fly ash reduced the plasticity index and improved the strength characteristics of the mix. Conventional construction equipment was used to mix and compact the fly ash with the in-situ soil.

• Supplemental Notes:
  • Proceedings of 4th International Ash Utilization Symposium, St. Louis, Missouri, March 24-25, 1976.
• Corporate Authors:

  Energy Research and Development Administration

  Morgantown Energy Research Center
  Morgantown, WV nia   

  Energy Research and Development Administration

  Morgantown Energy Research Center
  Morgantown, WV nia   
• Authors:
  • Joshi, R C
  • Duncan, D M
  • Durbin, W L
• Conference:
  • Proceedings of 4th International Ash Utilization Symposium, St. Louis, Missouri, March 24-25, 1976.
• Publication Date: 1976

Media Info

• Pagination: p. 251-261

Subject/Index Terms

• TRT Terms: Applications; Backfilling; Building materials; Clay; Construction joints; Fills; Fly ash; Foundations; Mineral fillers; Plasticity index; Soil compaction; Soil stabilization; Soils; Strength of materials; Subgrade (Pavements)
• Uncontrolled Terms: Soil treatment; Stabilization; Strength development
• Old TRIS Terms: Backfills
• Subject Areas: Geotechnology; Highways; Materials; Research;

Filing Info

• Accession Number: 00165783
• Record Type: Publication
• Report/Paper Numbers: MERC/SP-76/4 Proceeding, CONF-760322, CONG-760322
• Files: TRIS
• Created Date: Dec 27 1977 12:00AM