The effect of Calcium Chloride and Magnesium Hydroxide in Electro-Osmosis Process on Kaolinite Soil

Abstract

Problems encounter by clay soil such as low permeability, high plasticity, low strength and poor consolidation process has lead to large settlement of construction area when load is applied on clay soil. To enhance the consolidation process and also in order to strengthening the soil, electro-osmosis technique with chemical injection is inspected in this project. Electro-osmosis is the application of direct or alternating current through the soil that will generates dissipation of water despite in low permeability soil such as clay. Injection of chemicals is to enhance clay properties in term of strength. Improvement in clay strength is because of the cementation that take place in clay soil. This cementation process is due to the reaction of dissolve clay ion such as silicates and aluminates with dissolves calcium ion produced by chemicals. Calcium Chloride, CaCl2 and Magnesium Hydroxide, Mg(OH)2 are used in this experiment since both of these chemicals has shown an improvement in soil strength due to cementation process. As regards to the results obtained, CaCl2 is a better chemical solvent used in improving strength of kaolinite soil. Kaolinite soil that recovered from Bidor, Perak is sample that is used for all tests including electroosmosis test by using box and cylinder. Both of these tests are performed in order to investigate the similarity of electro-osmosis effect by using different apparatus. The shear strength and moisture content test is also conducted for analysis purposes in term of strength of kaolinite soil and amount of water dissipation after electro-osmosis process. Current value is also measured in this project for analysis of the relation between strength of kaolinite soil and current. For this analysis, different voltage is applied and voltages used are 30 Volts and 100 Volts. From the observation, high voltage will effect the increasing in current value. High current value will cause increased in temperature and increasing the dissipation of water

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This paper was published in UTPedia.

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