Analysis of Changes in the Micromorphology of Sandstone Joint Surface under Dry-Wet Cycling

Table 1

Typical physical and mechanical parameters of sandstone.

Project		Value
Density (g⋅cm^−3)	Natural	2.55
	Saturated	2.60
Young’s modulus (GPa)		25.6
Poisson’s ratio		0.28
Uniaxial compressive strength (MPa)		90
Tensile strength (MPa)		4
Cohesion (kPa)	Natural	390
	Saturated	300
Internal friction angle (°)	Natural	42
	Saturated	34