Stabilization of FGC Wastes

by C. Robert Ullrich, Univ of Louisville, Louisville, KY, USA,
D. Joseph Hagerty, Univ of Louisville, Louisville, KY, USA,

Document Type: Proceeding Paper

Part of: Geotechnical Practice for Waste Disposal '87


Presently, flue gas cleaning (FGC) wastes (scrubber sludges and flyash) are produced in large quantities, with future production likely to increase as utilities install additional stack cleaning equipment. This paper summarizes results of three related studies on stabilization of FGC wastes. In the first study, coefficients of permeability were measured for twenty materials from seven power plants. Relations between permeability and void ratio were determined for uncombined materials and sludge-flyash-lime mixtures. In the second study, combinations of sludge, flyash, and lime were tested to determine mix proportions yielding maximum unconfined compressive strength after curing. The third study focused on the effects of freezing and thawing on strength of cured mixtures of sludge, flyash, and lime. Results typical of each study are presented.

Subject Headings: Waste management | Sludge | Fly ash | Waste disposal | Waste treatment | Lime | Emissions | Permeability (material)

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