The soil was firstly ground into powder, which was then thoroughly
mixed with a sufficient amount of distilled deionized water by a
mechanical mixer so that its water content was 1.5 times greater than
its liquid limit. The soil or slime was placed in the test container in
layers. The samples for the electroosmotic test were then made by
applying 100 kPa of the vertical pressure to the soil by increments
to reproduce the normally consolidated condition and the state of
stress at a depth of about 10 m below the ground surface. With each
increment, the sample was consolidated up to 95% of degree of consolidation,
as measured from the piezometers installed at the bottom
of the sample and evaluated from the consolidation theory. The water
content after consolidation or before treatment was equal to 30%.