Assessment of electro-osmotic stabilization of expansive soils

Among the most common types of problematic soils، are probably expansive soils. One of the modern methods of strengthening and improving the soil in place is the use of electro-osmotic improving. This paper presents a design apparatus suitable for electro-osmotic treatment. A soil sample with high expansive potential is compacted and the effect of electro-osmotic treatment under different voltages of 12، 24 and 48 with the direct current (DC) and improvement periods of 1، 2، 7 and 28 days are studied. The results show that electro-osmotic treatment intensively reduced the expansive potential of soil (ie. 51-85%0) around of the anode pole. The chemical results show that PH of soil around the anode is reduced (27-46%). Also، the electrochemical change due to electro-osmotic treatment alters the soil properties and increases compression strength of soil up to eight times of initial strength. The increase of the compressive strength of the bed irrigation channels by electro-osmotic is enhanced the channels additional safety and stability.