Alternative Title

Paper No. 9.13

Location

St. Louis, Missouri

Session Start Date

3-8-1998

Session End Date

3-15-1998

Abstract

The Corinth landfill closure project was the first in New York State to use paper sludge as alternative barrier layer material in a landfill cap. The use of paper mill sludge in the cap reduced cost relative to a conventional clay or geomembrane cap system. The beneficial reuse of the paper sludge also saved landfill space. To demonstrate the feasibility of using paper sludge as barrier layer material, extensive research was conducted to evaluate the physical properties of the sludge, primarily hydraulic conductivity. Centrifuge model tests were conducted to simulate infiltration through the cap over a 30 year period. Centrifuge modeling was used in lieu of field test sections, at significant saving in time and cost. Paper sludge behaves similar to a highly organic peat soil. It has high water content, is highly compressible, and its hydraulic conductivity is a function of the organic content of the material. These characteristics impacted cap design and construction methods. This paper summarizes the research performed for this project, including centrifuge testing. Cap design is discussed, taking into consideration the properties of the sludge. Construction of the landfill cap is described, including construction techniques and QA/QC protocol. Barrier layer QA/QC data are summarized. Physical properties of the paper sludge are emphasized herein; analytical data are not included.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Fourth Conference

Publisher

University of Missouri--Rolla

Publication Date

3-8-1998

Document Version

Final Version

Rights

© 1998 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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A Municipal Landfill Cover With a Paper Sludge Barrier Layer

St. Louis, Missouri

The Corinth landfill closure project was the first in New York State to use paper sludge as alternative barrier layer material in a landfill cap. The use of paper mill sludge in the cap reduced cost relative to a conventional clay or geomembrane cap system. The beneficial reuse of the paper sludge also saved landfill space. To demonstrate the feasibility of using paper sludge as barrier layer material, extensive research was conducted to evaluate the physical properties of the sludge, primarily hydraulic conductivity. Centrifuge model tests were conducted to simulate infiltration through the cap over a 30 year period. Centrifuge modeling was used in lieu of field test sections, at significant saving in time and cost. Paper sludge behaves similar to a highly organic peat soil. It has high water content, is highly compressible, and its hydraulic conductivity is a function of the organic content of the material. These characteristics impacted cap design and construction methods. This paper summarizes the research performed for this project, including centrifuge testing. Cap design is discussed, taking into consideration the properties of the sludge. Construction of the landfill cap is described, including construction techniques and QA/QC protocol. Barrier layer QA/QC data are summarized. Physical properties of the paper sludge are emphasized herein; analytical data are not included.