COOLANT FOR THERMAL STABILISATION OF PERMANENTLY FROZEN GROUND Russian patent published in 2016 - IPC C09K5/10 

FIELD: construction.

SUBSTANCE: invention relates to construction and refrigerating equipment, namely to working compositions for thermal stabilisation of soil during arrangement of bases and supports of buildings and structures, pipeline systems in permafrost zone, more specifically to coolants used in devices and soil freezing systems. Coolant has low viscosity, high anticorrosion activity and heat conductivity, preserves a homogeneous composition and is a mixture of components, wt%: propylene glycol 40-45 %, glycerine 5-7 %, target additives 1-4 %, water - balance. Its viscosity is within range from 10 to 90 MPa·s, and heat conductivity of 0.420 to 0.446 W/(m·) in temperature range from minus 5 to minus 30 °C.

EFFECT: higher efficiency of freezing and thermal stabilisation of soil and low cost of pile construction of structures due to increased volume and stability of frozen soil massif.

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