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Name: Gregory
Status: Student
Age: 20s
Location: N/A
Country: N/A
Date: N/A 

I am wondering what the thermal conductivity (in W/m-K)is for clay (or for different types of clay)?


The thermal conductivity of soils is mostly controlled by water content, although, obviously, the type of soil is also important. For an average clay, the thermal conductivity in W/(m K) is 0.25 for no soil moisture, about 1.0 for 10% soil moisture (% by volume), 1.25 at 14% (a bend in the thermal conductivity curve occurs here), 1.67 at 30%, and about 2.0 at 50%. That will give you a rough idea.

David R. Cook
Atmospheric Section
Environmental Research Division
Argonne National Laboratory

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