Mechanical Properties and Failure Modes of Rock Specimens with Specific Joint Geometries in Triaxial Unloading Compressive Test

Table 1

The parameter comparisons between sandstone and cement mortar.

	Sandstone	Cement mortar
Cohesion (MPa)	16.2	10.7
Internal friction angle (°)	35	31.5
Uniaxial compression strength (MPa)	39.29	32.65
Elasticity modulus (GPa)	10.25	9.24
Poisson’s ratio	0.40	0.38
Unit weight (kN/m^3)	22.0	20.6