Mechanical Performance and Durability Evaluation of Sandstone Concrete

Table 3

Basic physical indexes and microstructure parameters of sandstone.

Lithology	Rock number	Density, ρ (g·cm^−3)		Coefficient of water saturation, wa (%)	Porosity, n (%)	Relative density, Gs	Bulk density, ρD (%)	Particle area ratio, GAR (%)	Particle contact rate, Gc (%)	Relative average particle size, φ	Standard deviation, σ
		Dry density, ρd	Saturation density, ρsat
Silty mudstone	Mudst	2.38	2.54	6.72	11.19	2.68	8.20	4.50	0.4	—	—
	Slst1	2.53	2.61	1.74	5.95	2.69	16.20	14.00	4.0	4.83	0.55
Muddy siltstone	Slst2	2.66	2.67	0.53	2.56	2.73	87.15	65.46	52.1	4.32	0.51
	Slst3	2.62	2.66	1.20	3.32	2.71	35.40	36.50	24.0	4.38	0.78
Muddy fine sandstone	Fnst	2.34	2.47	5.52	12.62	2.67	26.70	16.00	10.2	3.42	0.48
Gravelly fine sandstone	Pltst	2.68	2.70	0.71	2.55	2.75	58.20	62.80	40.3	3.81	0.78
Grits	Gitst	2.20	2.29	4.74	17.3	2.66	14.30	—	3.0	2.52	0.91