Application of a Bentonite Slurry Modified by Polyvinyl Alcohol in the Cutoff of a Landfill

Figure 5

SEM image of bentonite slurry modified by 0.19% PVA (no. A3 in Table 9): (a) curing period = 7 days; (b) curing period = 14 days; (c) curing period = 28 days.

(a)

(b)

(c)