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.
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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| buy black lava rock |
Packaging & Shipping
1.25kg woven bag,40 woven bags/jumbo bag.
2.25kg woven bag,40 woven bags/pallet
3.25kg paper bag,40 paper bags/pallet
4.25kg paper bag,40 paper bags/paper box
5. as client demand
http://www.globmineral.com/lava-rock/
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