ENGINEERING PROPERTIES OF MSW LANDFILL DAILY COVERS USING WASTE TIRE CHIPS AND PAPER SLUDGE
Soils are the traditional materials for municipal solid waste (MSW) landfill daily covers, but their performance is debatable, particularly in consumption of the valuable landfill space (Aivaliotis & al. 1995; Greedy 1995; Haughey 2001; Panagiotakopoulos and Dokas 2001; Aivaliotis & al. 2004) and in contribution to waste mass hydraulic heterogeneity and instability (Hancock & al. 1999, Jang 2000, Dixon and Jones 2005). The use of waste materials, which should be disposed of to landfills, as landfill daily covers encourages the practice of waste recycling and thereby prolongs the life of existing landfills. In addition, it also provides a practical solution to places where suitable soils are not readily available.
The use of earth materials as daily covers not only consumes valuable landfill space, but also brings a series of operating issues such as fine migration and hetergenity of waste mass. In this study, a mixture of paper sludge and waste tire chips was proposed for daily cover applications in MSW landfills. The engineering properties of the individual tire chips, the sludge, as well as their mixture, were evaluated in this study in terms of the index properties, hydraulic conductivity, and shear resistance of the materials. When compared to traditional soil covers, the proposed cover material was found to be lighter in weight, more impermeable and higher in shear resistance. It was also found that with the addition of tire chips to the paper sludge, the shear strength of the mixture improved considerably. The results suggest that the proposed material has mechanical characteristics that are desirable to be a landfill daily cover.
| Copyright: | © IWWG International Waste Working Group | |
| Source: | Specialized Session F (Oktober 2007) | |
| Pages: | 11 | |
| Price inc. VAT: | € 0,00 | |
| Autor: | Tinming Ng  Irene M.C. Lo | |
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