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
Effective porosity (%)
6.03
6.09
8.21
10.32
11.09
8.06
9.37
9.48