EVALUATION OF SULFATE-BEARING WASTE MATERIAL FROM FLUIDIZED BED COMBUSTION OF COALS FOR SOIL STABILIZATION

The effects of spent bed material from the fluidized bed combustion of coal in the physical and strength properties of selected fine-grained soils has been evaluated. The spent bed material is a mixture of lime and calcium sulfate (together with some fly ash) obtained from a process being evaluated by the Energy Research and Development Administration in which pulverized coal is burned in a fluid bed of finely ground calcitic or dolomitic limestone. Results of the study indicate that spent bed material is an excellent substitute for lime for soil stabilization. The material behaves as a mixture of lime, calcium sulfate, and fly ash towards development of unconfined compression strength when mixed with soils. It has been concluded that use of spent bed material for soil stabilization is a viable alternative to disposal when full-scale fluidized bed coal combustion plants become a reality.

  • Supplemental Notes:
    • Sponsored in part by Energy Research and Development Administration under Interagency Aggreement Contract No. E(49-18)-2491.
  • Corporate Authors:

    Midwest Research Institute

    425 Volker Boulevard
    Kansas City, MO  United States  64110-2299

    Federal Highway Administration

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

    Energy Research and Development Administration

    20 Massachusetts Avenue, NW
    Washington, DC  United States  20590
  • Authors:
    • Nebgen, J W
    • Edwards, J G
    • Conway, D
  • Publication Date: 1977-9

Media Info

  • Pagination: 70 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00175479
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-RD-77-136 Final Rpt., FCP 34C2-102
  • Contract Numbers: DOT-FH-11-8515
  • Files: NTIS, TRIS, USDOT
  • Created Date: Sep 14 1978 12:00AM