Effect of w_i on p_eq obtained by past studies: (a) data from Villar & Lloret (2008) for FEBEX bentonite; (b) data for Kunigel V1 bentonite; (c) data from Cui & Si (2014) for GMZ bentonite; (d) data from Komine & Ogata (1994) for Kunigel V1 bentonite; (e) data from Sugiura et al. (2009) for Kunigel GX bentonite