Abstract
Chemical grouting method can be used in order to improve the loose sand against the earthquake induced liquefaction. Long term stability of chemically stabilized sand is required for the chemical grouting method to be used to prevent the earthquake induced liquefaction. However, it is quite difficult to obtain and predict the long term performance of chemically stabilized sand.
Experimental investigation of long term stability of chemically stabilized sand has been carried out by using the promotion of the silica diffusion and leaching within the chemically stabilized sand under the water flow. It is demonstrated that the time dependent variation of the physical properties of chemical stabilized sand is closely related to the silica movement and leaching from the chemically stabilized sand. Silica movement and leaching of the chemically stabilized sand are obtained by the finite element analysis based on the silica diffusion equation.
It is concluded that the long term stability of chemically stabilized sand can be quantitatively evaluated using the combination of the flow water promotion test of chemically stabilized sand and the finite element analysis based on the silica diffusion equation.
