The suitability of pofa (palm oil fuel ash) treated clay soil for liner material in sanitary landfill
Liner is the most important part of waste containment systems such as landfills. It serves as a hydraulic barrier to control or restrict the migration of contaminant/leachate from the landfill into the environment. Many liner systems have been developed and used such as compacted clay liners are wid...
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| Pengarang-pengarang Utama: | , |
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| Format: | Conference or Workshop Item |
| Diterbitkan: |
2006
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| Subjek-subjek: | |
| Capaian Atas Talian: | http://eprints.uthm.edu.my/1947/ http://eprints.uthm.edu.my/1947/1/THE_SUITABILITY_OF_POFA_YULIA_FITRI_AMZAR.pdf |
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| Ringkasan: | Liner is the most important part of waste containment systems such as landfills. It serves as a hydraulic barrier to control or
restrict the migration of contaminant/leachate from the landfill into the environment. Many liner systems have been developed
and used such as compacted clay liners are widely used because of its cost effectiveness low permeability, large attenuation
capacity and resistance to damage and puncture. The target from this project is to reduce the permeability of compacted POFA
treated clay liner until k value at least 1 x 10'7 cm/s (Daniel and Benson, 1990; Daniel 1993; Mohamed and Ant ia, 1998). The
main purpose of this study is to determine the potential use of POFA as soil stabilizer for liner landfill construction. The
laboratory tests were conducted on the clay soil properties, permeability, linear shrinkage, unconfined compression test for
origin soil, direct shear test for admixture sample. The test results will compare with those recommended by researchers for
evaluation suitability. The engineering properties of clayey soils may need to be improved to make them suitable for liner
construction. Stabilized mixture of POFA-clay improve the shear strength as well as permeability, the permeability were reduced
until 4.222 x 10~'° m/s. 14 and 16 percent of POFA through sieve 300 \Jm and 425 fJm are suitable to used as admixture to sample
with the shrinkage limit < 4%. Only soil admixture with 14% of POFA (300/Jm) has the strength of225 kPa. Thus, the soil with
14% of POFA is suitable for liner material of sanitary landfill. |
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