The coupled effect of suction and net stress on the air permeability of compacted soils Available to Purchase

The coupled effect of net mean stress and suction on the air permeability of compacted soils has been investigated in this study. The air permeability of compacted soils was conducted at various pre-equilibrated gravimetric water contents and at different net mean stresses using the falling head method. The pre-equilibrated gravimetric water contents at different net mean stresses were related to soil suction using stress-dependent water retention curves (WRCs) measured experimentally by combining the results of the axis translation technique and the dew point potentiometer. The existing statistical model for predicting the air permeability function (APF) was modified to account for net stress and higher suction. An alternative approach to estimate the stress-dependent WRC from air permeability measurements was proposed. The prediction of the WRC and air permeability under different net stress conditions from the modified APF model was found to be in close agreement with the experimental results.