Mesoscopic Freeze-Thaw Damage Evolution Characteristics of Fractured Sandstone at Different Saturations

Table 3

The fracture volume growth rate of five sandstone samples with different saturation.

State	Fracture volume growth rate (%)
	A	B	C	D	E
Δ1^1	10.3	14.1	22.4	28.2	37.1
Δ2^2	29.9	45.3	65.8	73.1	125

¹The change in parameters was obtained from 30 freeze-thaw cycles and 0 freeze-thaw cycles. ²The change value of the parameters obtained from 60 freeze–thaw cycles and 0 freeze-thaw cycles.