| S. No. | Dry Density | Description | Porosity | Description |
| 1 | <1.8 | Very low | Over 30 | Very high |
| 2 | 1.8 - 2.2 | Low | 30 - 15 | High |
| 3 | 2.2 - 2.55 | Moderate | 15 - 5 | Medium |
| 4 | 2.55 - 2.75 | High | 5 - 1 | Low |
| 5 | Over 2.75 | Very high | <1 | Very low |