Study on Acoustic Emission and Damage Mechanical Properties of Freeze-Thaw Sandstone under Uniaxial Compression

Table 1

Changes in the physical parameters of red sandstone after freeze-thaw cycling.

Freeze-thaw cycles	Quality/g	Mass change rate/%	Wave velocity/km·s^-1	Variation rate of wave velocity/%	Open porosity/%	Leeb hardness/HL
0	488.71	0	3.832	0	0.02242	738
5	487.20	− 0.32773	4.1325	7.841858038	0.02723	734
10	486.11	− 0.40967	4.202	9.655532359	0.02806	728.6
20	492.02	− 0.47112	4.2555	11.05167015	0.0281	675.8
30	484.30	− 0.47931	4.2735	11.52139875	0.0283	571.6