Investigation of Erosion of Cement-Bentonite via Piping

Figure 4

Example of the 14 days CB-PFA sample being eroded for 2 hours. (a) Surfaces of entrance and exit of the hole before and after test; (b) cast of the eroded cavity; (c) extracted black silhouette of the cast; (d) brittle transverse microcracks appeared during eroding.

(a)

(b)

(c)

(d)