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Physicochemical properties of Batu Pahat clay using electrokinetic stabilisation method

Nordin, Nurul Syakeera (2015) Physicochemical properties of Batu Pahat clay using electrokinetic stabilisation method. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Electrokinetic Stabilisation (EKS) method is a combination process of electroosmosis and chemical grouting. This study involves the investigation on the EKS method performances in stabilising soft clay soils. Stabilising agents will assist the EKS method by inducing it to the soil under direct current and its movements which is governed by the principle of electrokinetic (EK). The objective of this research is to study the effectiveness of EKS method in increasing the strength of soft clays. EKS test rig was made by transparent acrylics plate (15mm) with 420 mm depth, 170mm width and 358 mm length. Soil compartment in the container was 278 mm length while for anode and cathode reservoirs were 40 mm length. Two reactors were set up by using 1.0 M of calcium chloride (CaCl2), sodium silicate (Na2SiO3) as the electrolyte and stainless steel plates as the electrode. The method was conducted at Research Centre for Soft Soil (RECESS), UTHM. EKS method was being performed for a period of 21 days, with a constant voltage gradient (50 V/m). This method was carried out in two phases where the difference between them is a combination of the stabilising agent. The two combinations of stabilising agents in phase 1 and phase 2 were CaCl2 – distilled water (DW) and CaCl2 – Na2SiO3, respectively. Results of the physical and chemical parameters towards untreated and treated soil were presented. Generally, showing the strength of treated soil for both phases was increasing near the cathode section with 27.83 kPa and 27.67 kPa. LL and PI for treated soil showed the highest value which occurred near the cathode, while PL seems consistant with the values from untreated soil. The calcium (Ca+) and sodium (Na+) concentrations in soil were increasing compared to the untreated soil, hence it has proven that the application of stabilisers in EK treatment is more effective in increasing the strength and the stability of soils.

Item Type: Thesis (Masters)
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA703-711 Engineering geology. Rock mechanics. Soil mechanics.
Depositing User: Mr. Mohammad Shaifulrip Ithnin
Date Deposited: 22 Feb 2017 10:02
Last Modified: 22 Feb 2017 10:02
URI: http://eprints.uthm.edu.my/id/eprint/8903
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