Table 6 Basic physical and mechanical characteristics of the four sandstones.
From: Petrophysical and mechanical characterization of sandstones from different grottoes in China
Sandstones | YG | TLS | LS | DZ | |
|---|---|---|---|---|---|
Apparent density (g/cm3) | Mean ± SD | 2.42 ± 0.01 | 2.32 ± 0.00 | 2.34 ± 0.01 | 2.40 ± 0.00 |
Real density (g/cm3) | Mean ± SD | 2.64 ± 0.01 | 2.65 ± 0.00 | 2.64 ± 0.01 | 2.69 ± 0.00 |
Open porosity (%) | Mean ± SD | 7.62 ± 0.15 | 10.81 ± 0.19 | 10.24 ± 0.15 | 8.43 ± 0.24 |
Total porosity (%) | Mean ± SD | 7.90 ± 0.26 | 12.10 ± 0.11 | 11.59 ± 0.45 | 11.17 ± 0.49 |
UCS (MPa) | Mean ± SD | 58.7 ± 5.2 | 33.2 ± 6.0 | 43.5 ± 3.6 | 62.2 ± 1.1 |
Vp (m/s) | Mean ± SD | 2633 ± 67 | 1741 ± 24 | 1967 ± 28 | 2651 ± 11 |
Surface Hardness (HLD) | Mean ± SD | 518 ± 59 | 576 ± 22 | 569 ± 7 | 603 ± 8 |
