Influence of Chemical Corrosion on Pore Structure and Mechanical Properties of Sandstone

Table 2

Porosity of specimens with different times of immersion in chemical solutions.

Specimen	Porosity of sandstone specimens (%)
	0 days	10 days	20 days	30 days	40 days	50 days
A4	4.909	6.875	8.590	9.354	9.724	9.819
A5	5.145	7.213	9.011	9.774	10.181	10.235
A6	5.278	7.392	9.265	10.022	10.444	10.561
A7	4.968	6.972	8.684	9.43	9.784	9.996
A8	5.198	7.317	9.109	9.862	10.254	10.416
A9	4.922	6.808	8.595	9.518	9.756	9.863
Average value	5.070	7.096	8.876	9.660	10.024	10.148
B4	5.154	5.822	6.234	6.342	6.390	6.425
B5	5.014	5.682	6.094	6.172	6.216	6.265
B6	5.099	5.787	6.167	6.273	6.326	6.372
B7	4.869	5.517	5.798	5.982	6.015	6.082
B8	5.108	5.772	6.181	6.283	6.339	6.381
B9	5.139	5.807	6.220	6.319	6.373	6.425
Average value	5.064	5.731	6.116	6.229	6.277	6.325
C4	4.950	6.685	7.896	8.521	8.915	9.008
C5	5.134	6.932	8.221	8.831	9.239	9.339
C6	5.137	6.940	8.221	8.836	9.252	9.349
C7	5.062	6.829	8.102	8.714	9.116	9.214
C8	5.158	6.933	8.253	8.876	9.279	9.386
C9	4.943	6.675	7.912	8.506	8.884	8.966
Average value	5.064	6.832	8.101	8.714	9.114	9.210