ABSTRACT
In general, the non-expansive soil layer could have a saturated hydraulic conductivity the same as, higher than, or lower than the underlying expansive soil. As a part of an on-going study at Arizona State University, the full range of hydraulic properties of the replacement layer is being evaluated. In this paper, preliminary findings are presented for the case of remove-and-replace mitigation where the replacement layer has a higher hydraulic conductivity than the underlying clay. This represents, for example replacement of expansive soil with a non-expansive granular fill.
