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Paper Mill Sludge Landfill Cover Construction

by Juan D. Quiroz, (A.M.ASCE), Dept. of Civil Engineering, Rensselaer Polytechnic Institute, 110 8(th) St., Troy, NY 12180-3590, United States,
Thomas F. Zimmie, (M.ASCE), Dept. of Civil Engineering, Rensselaer Polytechnic Institute, 110 8(th) St., Troy, NY 12180-3590, United States,



Document Type: Proceeding Paper

Part of: Recycled Materials in Geotechnical Applications

Abstract:

A considerable amount of experience has been acquired from a number of completed paper mill sludge landfill covers within the United States. This paper focuses on practical guidelines for landfill cover construction using paper mill sludge. The need for these guidelines arises from the unique properties and behavior (high water contents, high organic contents, low shear strengths and a high degree of compressibility) of paper sludges as well as problems that have been encountered during past construction. In general, paper sludge water contents vary from about 100% to 250% and are placed typically 50% to 100% wet of optimum water content while clay water contents are often less than 30% and are placed typically 3% wet of optimum. Hence design issues, construction quality control/construction quality assurance (CQC/CQA) tests, laboratory testing, field compaction, and landfill slope stability have been addressed to facilitate the design and construction process for paper mill sludge landfill covers.

Subject Headings: Landfills | Sludge | Industrial wastes | Water content | Shear strength | Laboratory tests | Field tests | United States

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