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Implementation of electro-osmotic consolidation test through laboratory approach

Mohd Yusof, Khairul Nizar and Marto, A. (2013) Implementation of electro-osmotic consolidation test through laboratory approach. In: 9th International Conference of Geotechnical and Transportation Engineering (GEOTROPIKA) and 1st International Conference on Construction and Building Engineering (ICONBUILD) - GEOCON2013, 28-30 October 2013, Johor Bahru, Malaysia.


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Soft clay is cohesive soil having water content higher than its liquid limit. It is a type of finegrained soils which changedvolume when permanently loaded in a process called‘consolidation’. Due to that, the occurrence of unstable and highly differential of settlement under a structure is a common phenomenon. The improvements are needed for this type of soil before any construction takes place to avoid ground or structural failure in the future. The basic concepts of soil improvement include densification, cementation, reinforcement, soil modification or replacement, drainage and other water content control. Ground modification played a very essential role in many Geotechnical projects. One of the methods to improve this soil is using electro-osmotic consolidation. The electro-osmotic consolidations method will alter the hydraulic conductivity of the soil, hence improved the soil with the process of discharging the water within the soil particles. The method of this treatment depends on applied voltage and electrode material and the time of the treatment depends on the soil properties. This paper demonstrates the implementation of electroosmotic process in small laboratory approach and synthesized the effect of void ratio and the coefficient of volume compressibility due to electro-osmotic process. A sample with one terminal positive (anode) surrounded with eight terminal negative (cathode) was tested to implement the electro-osmotic consolidation on the laboratory approach. The sample that was tested for 24 hours on phase 2, recorded 0.49 mm of vertical readings with 5 Volts as the applied voltage,develops a reduction in void ratios, low in water content and high in stiffness. Due to the significant stiffening effect at the end of 50 kPa vertical load application, this method is seen to have potential applications in improving the soft soils in situ.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: soft clay; electro-osmotic; consolidation; soil improvement
Subjects: T Technology > TD Environmental technology. Sanitary engineering > TD201-500 Water supply for domestic and industrial purposes
Divisions: Faculty of Civil and Environmental Engineering > Department of Infrastructure and Geomatic Engineering
Depositing User: Normajihan Abd. Rahman
Date Deposited: 13 Dec 2013 09:47
Last Modified: 21 Jan 2015 08:06
URI: http://eprints.uthm.edu.my/id/eprint/4569
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