Feasibility Study of Coupled Hydraulic and Electrophoretic Injecting colloidal silica in silty sand

Document Type : Research Article


Department of Geotechnical Engineering, Faculty of Engineering, Imam Khomeini International University, Qazvin, Iran


Electro kinetic approach is a conventional method to improve soil characteristics. Dewatering, heavy metal remediation as well as injection stabilizers such as sodium silicate, colloidal silica and ionic solutions, especially in clayey and silty soil, which are sensitive to high pressure methods, are applicable via electro kinetic way. As a green product stabilizer, colloidal silica a dispersion of nano silica particles in water medium phase has been widely investigated by researchers. To quantify the effect of various factors such as solution electrochemical properties and electro kinetic injection conditions on stabilized soil and pore fluid, a suitable apparatus is necessary for laboratory tests. The apparatus should facilitate control and management of hydraulic and electro kinetic conditions. So, the main objective of the paper is to study the electro kinetic injection synced with hydraulic one into loose sand via appropriate instrument. An appropriate device has been designed and constructed and validated by feasibility tests. The trend of current intensity was compatible with previous works as well as uniaxial shear strength and shear wave velocity increase of soil. In conclusion, built apparatus could be useful for future studies.


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