Temperature-Time Curves as Soil Freezes Related to Moisture-Stress Curves1
- D. D. Evans,
- J. A. Horrigan and
- C. E. Chinn2
The rate of cooling of a moist soil sample during freezing is determined by the rate of heat dissipation to the surroundings and the rate of ice formation with the sample. Assuming equilibrium conditions at an instantaneous temperature, the amount of ice formed between two temperatures depends upon the amount of water held in the sample between the soil moisture stresses associated with the two temperatures.
Temperature-time curves (freezing curves) during freezing have been obtained for soils using a thermistor and recording potentiometer. The curves have been related to moisture-stress curves derived through the use of standard pressure apparatus. A method is presented which may allow the construction of a moisture-stress curve from one freezing of a single sample of soil.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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