Macro- and Microresearch on Swelling Characteristics and Deformation Mechanism of Red-Bed Mudstone in Central Sichuan, China

Figure 3

The whole process of sampling in the swelling test: (a) drilling on site; (b) drilled core; (c) sealing of core; (d) preparation of cylindrical samples.

(a)

(b)

(c)

(d)