
| BS 2/11 | L 2/11 | |
| Material | Expanded shale | Lava |
| Water storage capacity | approx. 15% by vol. | approx. 15% by vol. |
| Weight by volume, delivered moist | 630 kg/m3 | 930 kg/m3 |
| Weight by volume, saturated | 780 kg/m3 | 1,050 kg/m3 |
| Compaction due to transportation and installation | 5% | 10% |
| Delivery form | Silo, tipper truck, big bag | Silo, tipper truck, big bag |