Sixteen specimens made of Morin Clay with a saturation percentage of 86% were subjected to freezing tests in open system fed by distilled water, NaCl solution, CaCl2 solution and Na2SO4 solution respectively.Before freezing test specimens were homogeneous in water content but heterogeneous in chemical composition with a vertical concentration gradient.After freezing test both water content and the dominant-anion content in frozen part of the soil samples increase;this means that not only moisture but also i...