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Study on the Effect of Pore Fluids on the Liquid Limit of Dispersive and Non Dispersive Clays

Author Affiliations

  • 1Division of Civil Engineering, School of Engineering, CUSAT, Cochin, Kerala, India

Res. J. Engineering Sci., Volume 5, Issue (6), Pages 1-4, June,26 (2016)


The surface and subsurface contamination mainly occurs due to acid rain, disposal of industrial, mining, agricultural wastes and accidental spillage of chemicals on the land. Clays that have high erosion tendency are known as dispersive clays which constitutes of predominance of dissolved sodium in the pore water. They are different from ordinary clays. The dispersive clays are identified by the crumb test. Various environmental factors like overburden pressure, temperature, pore fluid, mineral types, dry density etc. control the properties like shrinkage, swelling, cracking and shear strength. As pore fluid changes properties of soil also changes. This necessitates the study of behaviour of different type of soil in different environmental conditions. The geotechnical behaviour of soils are greatly influenced by the variations in concentrations and properties of pore fluids. The objective of this paper is to determine the influence of various pore fluids on liquid limit of dispersive and non dispersive soils. Various pore fluids used in the study are ammonium chloride and sodium hydroxide which are the common constituents of acid rain and alkali rain. Identification of dispersive soil and effect of pore fluids on liquid limit of dispersive and non dispersive soils were discussed.


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