Fig. 5. Examples of problems faced when fitting the VG modified equation on experimental shrinkage curves with linear phases, sloping ends, or dissymmetric parts. Experimental shrinkage (ShC) and water retention (WRC) curves (solid line), fitted VG modified and VG equations (bold dashed gray line) compared to fitted XP models (black dotted line) for sample C-15 (top) and sample F-17 (bottom) different from the ones presented before.