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Table 3 The effective porosity of rock samples after and before treatment with water and acidic solution

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

 

Natural state

Water

H2SO4 (mol L−1)

HNO3 (mol L−1)

0.2

0.4

0.8

0.2

0.4

0.8

Effective porosity (%)

6.03

6.09

8.21

10.32

11.09

8.06

9.37

9.48