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Table 1 Basic information of the tested sandstones

From: Experimental study on capillary water absorption of sandstones from different grotto heritage sites in China

Sample Age of stratum Physical properties
Color Apparent density
(kg/m3)
Open porosity
(%)
Free water absorption
(mass, %)
Forced water absorption
(mass, %)
P-wave velocity
(km/s)
YG J2y Sandy brown 2436 (± 219) 9.64 (± 0.73) 3.16 (± 0.15) 3.95 (± 0.19) 2.88 (± 0.23)
DZ J3p Beige, grayish 2380 (± 202) 7.69 (± 0.62) 2.31 (± 0.08) 3.23 (± 0.12) 2.82 (± 0.24)
LS K2j Brownish red 2328 (± 256) 13.02 (± 1.43) 3.34 (± 0.23) 5.59 (± 0.29) 2.55 (± 0.28)
  1. Note: The average value of each parameter is listed with the standard deviation (SD) indicated in brackets