The suitability of pofa (palm oil fuel ash) treated clay soil for liner material in sanitary landfill

Fitri Amzar, Yulia and Suwandi, Amir Khan (2006) The suitability of pofa (palm oil fuel ash) treated clay soil for liner material in sanitary landfill. In: Seminar on The suitability of pofa (palm oil fuel ash) treated clay soil for liner material in sanitary landfill, 2006, KUiTTHO.

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Abstract

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.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Clay soil; POFA; Compaction; Permeability; Direct Shear Test; Shrinkage Limit
Subjects:T Technology > TD Environmental technology. Sanitary engineering > TD1-157 Environmental technology. Sanitary engineering
ID Code:1947
Deposited By:M.Iqbal Zainal A
Deposited On:05 Oct 2011 12:31
Last Modified:05 Oct 2011 12:31

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