Аннотации:
Some regions in Kazakhstan and Russia have a long winter season. On average, the
ice freezes is in early December and the end of March. In this study, the authors investigate the
different type of soil, four specimens of soil with different engineering characteristics and soil
classification by a unified classification method. The freezing test was carried out for four sorts
of classified samples CL by the Unification Classifications (USCS). The temperature change of
the specimens and change condition of the outside freezing temperature, appear the amount of
frost heaving. During the experiments the authors used the sample of soils - marine clay,
containing chemical additives– ash 4%, 6%, 8% and only clay. The frost test equipment
consists of a sample loading part, water supply part and a measuring device for heaving the
amount and atmospheric pressure. The measuring part is a load cell for measuring the pressure
and holder Linear Variable Differential Transformers (LVDT) for measuring the swelling
amount of the same phase. The boundary temperature condition was at -12°C. The temperature
of 1 cm deep at the surface of the specimen was 0°C and the inside temperature of the
experiment was changed to -3°C. As a results, for the TRRL standard it was found out that the
minimum heaving amount is 0,5 mm during 48 h, which has clay with chemical additives ash
8%, and maximum heaving amount is 4 mm during 48 h, which contains clay without chemical
additives.
