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Table 1 VDI information about thermal conductivity of different type of soils

From: Thermal response test numerical modeling using a dynamic simulator

  Sandstone Saturated clay Dry clay Limestone Marl Saturated sand Dry sand Clay scists
Average 2.3 1.7 0.5 2.8 2.1 2.4 0.4 2.1
Minimum 1.3 0.9 0.4 2.5 1.5 1.7 0.3 1.5
Maximum 5.1 2.3 1 4 3.5 5 0.8 2.1
Variance 1.267 0.467 0.2 0.5 0.67 1.1 0.17 0.2