ارزيابي اثر محلول هاي كلريد سديم بر هدايت هيدروليكي خاك هاي رسي متراكم

The Impacts of Sodium Chloride Solutions on Hydraulic Conductivity of Compacted Clays

Near all of the soil structures built to prevent permeation are exposed to brine. In such situations, hydraulic conductivity is the most significant parameter that may be influenced. Compacted clay is the major material that is used for its low conductivity. In this study, a series of flexible wall tests have been performed on a clayey soil for different confining pressures to evaluate the effects of sodium chloride solutions on variation of hydraulic conductivity. Measurement of some properties of effluent collected fluid such as electrical conductivity, have been assisted to interpret the results. Results show that the permeation of salt into sodium montmorillonite clay increases the permeability of such soils. However the increase in the confining pressure can reduce the range of permeability of soils.