Microscopic Characteristics of Fractured Sandstone after Cyclic Freezing-Thawing and Triaxial Unloading Tests

Figure 5

Typical failure modes of sandstone samples at (a) zero, (b) 20, (c) 40, (d) 60, and (e) 80 freezing-thawing cycles.

(a)

(b)

(c)

(d)

(e)