Study of the Characteristics Mechanical Damage and Constitutive Model of Crushed-Rocks from High-Grade Highway in Permafrost Region

Figure 10

SEM images of cyan sandstone at 50 and 2000 times under different number of freeze-thaw cycles.

(a) 5 freeze-thaw cycle

(b) 5 freeze-thaw cycle

(c) 20 freeze-thaw cycle

(d) 20 freeze-thaw cycle