Electro-osmosis drainage effect of a new type of EKG electrode

Abstract

The electro-kinetic geo-synthetics (EKG) electrode is a kind of electrode which may avoid the electrode corrosion and provide an effective drainage channel during the electro-osmosis process. Comparing tests between a new type of EKG electrode and the iron electrode were carried out. The drainage amount, drainage velocity, current, potential distribution, water content and cracks were monitored. Results showed that the iron electrode eroded seriously while the EKG electrode kept intact. In addition, drainage capacity on the soil’s top surface of the EKG electrode was better than that of the iron electrode. The potential drop on the electrode-soil interface of the EKG electrode was smaller than that of the iron electrode when the anode was arranged in the hexagonal pattern. The water content increased gradually from the anode to the cathode for the iron electrode, while it increased at first and then decreased from the anode to the cathode for the EKG electrode.