3.1 Water Transport Properties
As the WC-time profiles in Fig. 2 show, equilibrium water contents (EWC) of 98 ± 1% were obtained within 30
mins. Following on from this, when the samples were removed from the water and left in air to re-equilibrate, as
shown in the WR-time plots in Fig. 3, equilibrium water retentions (EWR) of 22 ± 2% were obtained over a period
of about 4 hrs.