Effects of electro osmotic consolidation on South West of Johor: small laboratory scale

Mohd Yusof, Khairul Nizar and Arsyad, Abdul Kaharudin Effects of electro osmotic consolidation on South West of Johor: small laboratory scale. In: The International Conference on Civil and Environmental Engineering Sustainability (IConCEES 2011), 3-5 April 2012, Johor Bahru, Malaysia.

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Abstract

Soil clay is one of the problematic soils due to its natural states which have low bearing capacity and high compressibility. The effect and problem of the clay soil characteristic creates a problem for construction especially excessive settlement and this can leads to unstable and potential cracks. At presents, there are few improvement types can be carry out to overcome this problems, and electro osmotic consolidation is one of the options. This method has been applied many years ago especially European country. The study encompasses the determination of water content, Atterberg’s limits and undrained shear strength after electro osmotic consolidation treatment of soft clay soils taken from 0.5 m and 1.5 m at south west part of Johor. All the samples were tested accordance to BS1377:1990. An experimental study was implemented in a PVC cylinder tube having dimensions of 300 mm height and 100 mm diameter. In the results of electro osmotic consolidation in copper spring electrodes, the measured undrained shear strength was increased considerably at the anodes especially compared to the initial undrained shear strength due to electro osmosis process and consolidation. As laboratory studies of its measurement have shown, the application of electro osmotic consolidation after the application of a direct current applied voltages of 10 Volts, at the anodes especially: (i) a decrease by approximately 35% in water content; (ii) an increase around 29% in undrained shear strength; and (iii) a decrease about 21% in index plasticity. The results obtained in this study shows that the electro osmotic enhanced 15 kPa vertical loading consolidation is a feasible approach in strengthening of south west soft clay in Johor. It can be clearly suggested that the higher the voltage applied in the system, the higher readings of undrained shear strength and the lower of water content especially at the anodes.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:soft clay soils; electro osmotic; consolidation; water content; undrained shear strength
Subjects:T Technology > TA Engineering (General). Civil engineering (General) > TA630-695 Structural engineering (General)
ID Code:2532
Deposited By:Normajihan Abd. Rahman
Deposited On:10 Oct 2012 16:12
Last Modified:10 Oct 2012 16:12

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