Experimental Study on Mechanical Properties of Prefabricated Single-Cracked Red Sandstone under Uniaxial Compression

Table 2

Plan for the uniaxial compression experiment for the red sandstone specimens.

Group	Crack arrangement	Specimen number	Loading rate (N.s^−1)	Crack length 2a (mm)	Crack width 2b (mm)	Crack dip angle α (°)	Number of specimens
A		SY0-1∼3				0
B		SY15-1∼3				15
C		SY30-1∼3				30
D		SY45-1∼3	100	15	1	45	3
E		SY60-1∼3				60
F		SY75-1∼3				75
G		SY90-1∼3				90