Influence of Existing State of Pore Aqueous Solution on the Swelling Pressure of Expansive Soils

The paper studies the influences of pore aqueous solution on the swelling pressure of expansive soils through the constant volume swelling pressure experimental experiment. The results indicate that the swelling pressures decrease with the increasing of solution concentration. In the experiment, two specimens made of the same solutions concentration are immersed into solutions with two different concentrations, one less than the solution concentration used to prepare specimen, and the other same to that. The results shows that the swelling pressures of two specimens gained from the experiment are very close. The analysis on the existing state of the pore water shows that the experimental result is agree with the osmotic pressure theory.