Table 2 The dry and saturated weight, water absorption, and compressive strength of the rock samples

From: Acid solution decreases the compressional wave velocity of sandstone from the Yungang Grottoes, Datong, China

Samples

Dry weight (g)

Saturated weight (g)

Increase of weight (g)

Water absorption (%)

Compressive strength (kg cm−2)

Natural state

Soaked with H2SO4

Soaked with HNO3

#1

87.109

89.158

2.049

2.35

708

280

348

#2

74.138

75.757

1.619

2.18

614

240

334

#3

70.800

72.436

1.636

2.31

543

202

297

#4

79.149

81.101

1.952

2.47

609

  

#5

95.996

98.121

2.125

2.21

626

  

#6

84.325

86.204

1.879

2.23

618

  

Mean ± SD

81.920 ± 9.195

83.796 ± 9.388

1.877 ± 0.210

2.29 ± 0.11

620 ± 53

241 ± 39

326 ± 26

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