1.Introduction of volcanic stone:
Volcanic stone is a functional kind of environmental protection material.It is a kind of precious and polyporous stone, and formed by volcanic glass ,mineral and air bubble in the process of volcanic eruption.It contains sodium, magnesium, aluminum, silicon, calcium, titanium, manganese, iron, nickel, cobalt, molybdenum, and other dozens of minerals and trace elements.
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| where to buy black lava rock |
| Volume-weight(kg/m3) | 430-870 |
| Water absorption | 11.7-17.03% |
| Loose volume-weight(kg/m3) | 520 |
| Cylinder pressure strength | 1.218Mpa |
| Moisture | 1% |
| Mechanical Intensity | 5.08Mpa |
| Heat conductivity coefficient w/(m.k) | 0.326 |
| Soften coefficient | 0.84 |
| Apparent density | Kg/m 3 640-860/(390*240*190) |
| Hollow ratio(%) | 48/(390 *240 *190) |
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