ORGANIC LEACHATE EFFECTS ON PERMEABILITY OF COMPACTED KAOLINITE
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概要
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A study on the effects of four organic fluids on permeability of compacted kaolinite is presented. A flexible wall permeameter set up was designed and constructed. Permeation fluids were 0.1% and 100% nitrobenzene, acetone, phenol and benzene, each mixed with 0.01 N CaSO_4 as reference solution. Full saturation permeabilities (k_h) were obtained under continuous backpressure at hydraulic gradients (i_h) of less than 100 and effective stress of 69 kN/m^2. All tests with chemicals at low concentrations resulted in slight decrease of k_h. With pure solutions, however, the value slightly increased with acetone and phenol and significantly decreased with benzene and nitrobenzene. These results together with fabric studies indicated that changes in k_h with organic fluids can be explained by the variations in the surface forces of interaction on clay particles affecting the flow characteristics. In order to assess the effect of the testing scheme, acetone permeabilities were obtained in both rigid and flexible wall permeameters. Excessive increases in permeability were observed with the rigid wall permeameters. The possibility of the effective stresses in flexible wall permeameters veiling the permeability changes due to organic fluid permeation was investigated. The results indicate that the observed increases in permeability with rigid wall permeameters can only be explained by the side leakages due to shrinking of the compacted clay when permeated with organic solvents.
- 社団法人地盤工学会の論文
- 1989-06-15
著者
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Hamidon Abu
Department Of Civil Engineering University Of Malaya Lembah Pantai
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ALI FAISAL
Department of Civil Engineering, University of Malaya, Lembah Pantai
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Ali Faisal
Department Of Civil Engineering Universiti Malaya
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