Published: Jan 2000
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Field vane tests were conducted on paper sludge landfill covers located in Montague and Hubbardston, Massachusetts, to measure the in-situ undrained shear strength. These landfill covers used the same type of sludge for the barrier layer, and the basic cover designs were similar. The Hubbardston Landfill closure was completed in 1993 (the barrier layer has consolidated) and the Montague Landfill closure was constructed from 1993 to 1998. Therefore, the field vane results can be directly compared and the effects of consolidation can be evaluated. The range of undrained shear strength and water content for landfill covers constructed with Erving paper sludge was between 55 kPa to 12 kPa and 100% to 180%, respectively. The undrained shear strength of the paper sludge layer increased as the water content decreased, and the undrained shear strength generally increases due to consolidation. The field vane test is a rapid and economical method for determining the in-situ shear strength.
paper sludge, landfill covers, slope stability, field vane tests, shear strength
Graduate Research Assistant, Rensselaer Polytechnic Institute, Troy, NY
Professor, Rensselaer Polytechnic Institute, Troy, NY