Interactions Between Soils and Laboratory Simulated Electrolyte Solution |
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| Authors: | Sitaram Nayak B M Sunil S Shrihari and P V Sivapullaiah |
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| Institution: | (1) Department of Civil Engineering, National Institute of Technology Karnataka, PO: Srinivasnagara, Surathkal, 575025, India;(2) Department of Civil Engineering, Indian Institute of Science, Bangalore, 560012, India |
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| Abstract: | To study the impact of salt water intrusion on two types of soils from west coast region of India were investigated in the
laboratory. The key characteristics evaluated included Atterberg limits, compaction characteristics, hydraulic conductivity
and chemical characteristics of selected soils. The sea at this coast receives effluent from different points and hence the
characteristics change with time and locality. Therefore, to maintain uniform composition, 0.5 N sodium chloride solution
(NaCl) was prepared in the laboratory and batch tests were used to determine the immediate effect on soils. Soil specimens
were prepared by mixing the soils with 0.5 N NaCl in the increments of 0, 5, 10 and 20% by weight to vary the degree of contamination.
Experimental results of soils mixed with 0.5 N NaCl showed that the maximum dry density increases and the optimum moisture
content (OMC) decreases with increasing sodium chloride concentration. The study also revealed that the hydraulic conductivity
of the soils tested increases with increase in sodium chloride concentration. The Atterberg limits of contaminated specimens
show a remarkable change when compared with uncontaminated specimens. |
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