Abstract
AbstractDetermination of freezing point is the prerequisite for any laboratory or field study on the freeze–thaw behaviour of soils. Depression in the freezing point of soil pore water as compared to pure water (which freezes at 0 °C) in a two-phase or a three-phase soil system is associated with several factors such as water content, mineralogical composition, salinity of pore water, pore size, plasticity of soil, etc. An experimental study was conducted on three types of soils of different plasticity and gradation to study the effects of water content, salinity of pore water and plasticity of soil on the freezing point depression. The results showed that the freezing point significantly depresses only when water content decreases beyond a certain value. The freezing point also showed depression with increasing soil plasticity and a linear depression with increasing salinity of pore water. The study is a part of extensive laboratory investigation on frost susceptibility of soils in Kashmir.KeywordsSeasonally frozen groundsFreezing point depressionSalinityPlasticityFreeze–thaw test
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