Fig. 4. The shrinkage curves from Talsma's soils with three levels of applied stress (P = 0; 6.3 and 11.2 kPa) modeled by Eq. [10]. The square point (_z, e_z) is the end-point from residual shrinkage to zero shrinkage; the cross point (_d, e_d) is the dry-side maximum of the curvature; the diamond point (_p, e_p) is the end-point from the proportional shrinkage to residual shrinkage.