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- Title
Mechanical behaviors of a synthetic paste of tire chips and paper sludge in MSW landfill daily cover applications.
- Authors
Ng, Kelvin T. W.; Lo, Irene M. C.
- Abstract
A waste-derived paste of a mixture of paper sludge and tire derived aggregate (TDA) was investigated for daily cover application in municipal solid waste (MSW) landfills. The use of earth materials as daily covers not only consumes valuable landfill space, but also creates a series of operating issues. In this study, an experimental testing program was undertaken with the goal of evaluating the mechanical behaviors of the paste based on the findings of the index properties, compressibility, hydraulic conductivity, stress-induced deformation, stress–strain response, and shear resistance of the materials. The mechanical behaviors of the individual TDA, the sludge, as well as the mixture of the two, were evaluated. When compared to traditional soil covers, the proposed paste was: (i) 2–3 times lighter in weight; (ii) at least two orders of magnitude more impermeable; and (iii) comparable in shear resistance. It was also found that with the addition of TDA to the sludge, the shear strength of the paste was improved considerably. The reinforcing mechanisms were explored and quantified, suggesting an optimal TDA content of about 55% by weight. The results from this study indicate that the proposed paste has mechanical characteristics that are desirable for a potential landfill daily cover.
- Subjects
MECHANICAL behavior of materials; MECHANICS (Physics); ABRASION resistance; QUANTUM theory; WAVE mechanics; POWER (Mechanics); WORK (Mechanics); INDUSTRIAL wastes; PROPERTIES of matter; LANDFILLS
- Publication
Canadian Geotechnical Journal, 2007, Vol 44, Issue 8, p928
- ISSN
0008-3674
- Publication type
Article
- DOI
10.1139/T07-041