Abstract. Experimental studies of the change in the mass of unfrozen water
contained in frozen Na-bentonite clay in the temperature range from -30 to 0 °C and a gravimetric
moistures range from 0 to 1 g/g have been carried out by
the dielectric method. The calorimetric method is proposed for measuring the
specific latent heat of fusion of ice into bound and unbound water when the
frozen soil is heated. The method of dielectric measurements is proposed for
measuring the latent heat of fusion of ice in frozen soils during heating. In
order to substantiate the proposed technique, the latent heat of fusion of ice
in frozen bentonite clay measured by the differential scanning calorimetry
during heating was compared with this value obtained by the dielectric method.
Keywords: dielectric model, dielectric constant, frozen soil, unfrozen water, nonfreezable
water, bound water, phase transitions, differential scanning calorimetry.
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