Solidification of Sludges with Portland Cement

by E. Alan Cassell, (M.ASCE), Assoc. Prof. of Civ. Engrg.; Clarkson Coll. of Technol., Potsdam, NY,
Thomas W. Walker, Grad. Student; Dept. of Civ. Engrg., Clarkson Coll. of Technol., Potsdam, NY,

Serial Information: Journal of the Sanitary Engineering Division, 1970, Vol. 96, Issue 1, Pg. 15-26

Document Type: Journal Paper


Raw primary sewage sludge and a chicken manure was solidified by mixing with fly ash and Portland cement. By varying the proportions of sludge solids, fly ash, and cement in a mix, it was possible to control the time required for final set, and the physical properties of the resulting solid matrix. A maximum of 3.3% of the input phosphate was leached from the matrices over a 15-day period. Phosphates are efficiently incorporated into the solid matrix.

Subject Headings: Matrix (mathematics) | Solidification | Sludge | Portland cement | Soil mixing | Materials processing | Fly ash | Phosphate

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