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Table 2 Initial physical parameters of the sandstone

From: Experimental study on the effects of hydrochemistry and periodic changes in temperature and humidity on sandstone weathering in the Longshan Grottoes

Dry density

(g·cm−3)

Water

absorption rate

(%)

Porosity

(%)

Richter

hardness

(HL)

Wave

velocity

(km·s−1)

Compressive

strength (MPa)

Tensile

strength

(MPa)

2.28

4.65

10.81

498

2.214

24.83

2.85