The Uniaxial Creep Characteristics of Red Sandstone under Dry-Wet Cycles

Table 4

Axial strain changes of the red sandstone’s creep (unit: 10⁻²).

Red sandstone’s state	s = 1		s = 2		s = 3		s = 4		s = 5
	εa	εb	εa	εb	εa	εb	εa	εb	εa	εb
Dry state	0.389	0.403	0.504	0.517	0.562	0.574	0.625	0.644	0.703	0.737
Wet state	0.599	0.621	0.692	0.722	0.789	0.816	0.888	0.931	0.993	1.086
3 dry-wet cycles	0.700	0.745	0.901	0.978	1.016	1.236	1.517	1.811	Destruction
6 dry-wet cycles	0.801	0.853	1.048	1.127	1.248	1.490	Destruction
9 dry-wet cycles	1.110	1.169	1.402	1.484	1.615	1.928	Destruction

ε_a denotes the initial strain value of each stage; ε_b denotes the end strain value of each stage; s is the loading stage; s = 1, 2, 3, 4, 5.