Lime Sludge Amended Fly Ash for Utilization as an Engineering Materialby M. H. Maher, Rutgers Univ, Piscataway, United States,
J. M. Butziger, Rutgers Univ, Piscataway, United States,
D. L. DiSalvo, Rutgers Univ, Piscataway, United States,
I. S. Oweis, Rutgers Univ, Piscataway, United States,
Abstract: Sludges generated from various water treatment operations are predominantly subject to the fate of land disposal. To prepare sludges for land disposal typically requires time consuming dewatering schemes, which can become extremely difficult to execute dependent upon the composition of the sludge and its affinity for water. Due to the pozzolanic properties of fly ash and its demonstrated ability to achieve relatively high strength in the presence to lime, the utilization of lime sludge amended fly ash may not only reduce the strain on continuously decreasing land space, but also provide a useful engineering material for possible utilization as a landfill cap, linear, or engineered fill. In the following study, lime sludge from a groundwater remediation project was added in various proportions to coal fly ash. The mechanical properties of the resulting mixtures were analyzed, and permeability and leachate data was studied.
Subject Headings: Sludge | Fly ash | Lime | Recycling | Strength of materials | Water treatment
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