Deterioration of Physical and Mechanical Properties of Rocks by Cyclic Drying and Wetting

Table 2

Deterioration of different rocks after cyclic dry-wet treatment.

Rock type	Reference	Max	Max variation
			Physical properties		Mechanical properties
Sandstone	Z. Zhou et al. [33]	50		-5.69%	—
				+16.91%
				+12.48%
				-24.64%
			SDI	-3.07%
Sandstone joint	J. Fang et al. [43]	20		-8.98%
				-8.62%	JRC	-6.47%
				-8.75%	JCS	-44.21%
				-4.96%		-8.93%
Red-sandstone	B. Du et al. [37]	20		-3.62%	UCS	-18.28%
				-24.93%
Shaly sandstone	X. Liu et al. [31]	20	—	—	UCS	-68.69%
						-70.02%
Low clay sandstone	Z. Zhao et al. [32]	15	—	—	TS	-5%
Mudstone	M. Hu et al. [90]	15	Weight loss	-60.7%		-14.17%
						-15%
						-15.22%
						-19.31%
						-55.31%
Altered granite	X. Chen et al. [6]	60		+33.86%	UCS	-50.22%
						-63.84%
						-93.76%
						-53.90%
Black ignimbrites	A. Ӧzbek [21]	50		-8.33%	UCS	-16.08%
				-6.1%
				+13.99%
				+12.18%

is the number of dry-wet cycles, is the density, is the water content, is the porosity, is the P-wave velocity, is the largest bulge on the joint surface, is the largest valley on the joint surface, is the largest drop on the joint surface, and is the expansion area ratio of the joint surface (indicating the complexity of the joint surface); JRC is the roughness coefficient of the joint, JCS is the compressive strength of the joint surface, SDI is the slake durability index, is the internal friction angle, is the cohesive force, UCS is the uniaxial compressive strength, TS is the tensile strength, is the elastic modulus, is the shear modulus, and is the bulk modulus.