M. A. Nozari - PhD Candidate, Civil Engineering Department, Imam Khomeini International University, Qazvin, Iran,
R. Ziaie Moayed - Associate Professor, Civil Engineering Department, Imam Khomeini International University, Qazvin, Iran,

Electro-osmosis in clayey soils and sediments, for purposes of clay consolidation, dewatering, or cleanup, and electro injection in porous media is widespread recentdecades. It is experimentally found that the chemical properties of porous media especially pH and ionic strength change the characteristics of media. Electro-osmotic conductivity is a function of soil and grout material chemistry that alter with time. Many numerical approaches exist to simulate the of electro kinetic flow rate considering chemical changes. This paper presents a simplified analytical solution for constant flowrate based on varying electro osmotic conductivity and time dependent viscosity for injection of colloidal silica. This method shows that zeta potential distribution along the injection apparatus and the variation of that in electro osmotic injection is as important as viscosity in hydraulic grouting

Colloidal silica, electro-osmosis, pH, viscosity, zeta potential