Type of soils

In the paper 'Improving the Under-Ground Cables Ampacity by using Artificial Backfill Materials' by O.E. Gouda from 2010, artificial samples of soil, different ratios of sand, lime, clay and silt, were tested.

Symbol
$M_{soil}$
Related
Choices
Soil sample
 
Gravel
%
Sand
%
Silt
%
Clay
%
Lime
%
$\rho_4$ (wet)
K.m/W
$\rho_{4d}$ (dry)
K.m/W
Sand1.588.510.00.00.00.962.036
Lime1.51.57.00.090.00.9412.35
Clay3.06.02.089.00.00.6271.568
75% Sand + 25% Lime1.474.00.60.024.00.881.792
50% Sand + 50% Lime0.548.52.50.048.50.7841.911
25% Sand + 75% Lime0.324.01.70.074.00.8222.156
25% Clay + 75% Lime0.00.02.024.074.00.5221.304
Silt + Sand10.060.030.00.00.00.7561.9
Clay + Silt + Sand3.037.030.030.00.00.831.65