Experimental Study on the Property Degradation and Failure Mechanism of Weakly Cemented Sandstone under Dry-Wet Cycles

Table 1

Physical parameters and composition analyses of Cretaceous sandstone (−380 m) specimens in this study.

Sampling site	Physical parameter				Composition analysis
	Longitudinal wave velocity (mm/μs)	Density (g/cm^3)	Porosity (%)	Water absorption (%)	Quartz content (%)	Albite content (%)	K-feldspar (%)	Chlorite (%)
Cretaceous sandstone (−380 m)	25.03	2.46	4.32	1.78	34.56	22.49	12.32	7.64