Lava Stone

Product Description:
Lava stone is a kind of vitreous lava with dense pores formed by the rapid expansion of the internal gas due to the sharp decrease of the pressure after the magma cools rapidly during the volcanic eruption.The volume of pores accounts for more than 50% of the rock volume.It is characterized by high strength, heat preservation, heat insulation, sound absorption, fire prevention, acid and alkali resistance, corrosion resistance, and no pollution, no radioactivity, etc
 
Characteristic:
Light weight, high strength, heat preservation, heat insulation, sound absorption, fire prevention, acid and alkali resistance, corrosion resistance, and no pollution, no radioactivity, etc
 
Color:
Black and Red
 
Size:
1-3cm,3-5cm,5-10cm,10-15cm,15-30cm,30-50cm and so on.
 
Chemical Composition:

Item	Standard	Item	Standard	Item	Standard
SiO2	50-55%	CaO	7-10%	MgO	2-4%
Fe2O3	8-10%	FeO	1-2%	Al2O3	15-18%
TiO2	0.05-0.1%	K2O	2-3%	Na2O	2-3%

 
Physical Properties:

Volume-Weight(kg/m3)	430-870	Mechanical Intensity	5-6Mpa
Water Absorption	11-18%	Heat conductivity coefficient	0.3-0.4
Loose Volume-Weight(kg/m3)	520	Apparent density Kg/m 3	640-860
Cylinder pressure strength	1-2Mpa	Soften coefficient	0.8-0.9
Moisture	1%	Hollow ratio	45-50%

 
Packing:
10kg bag,25kg bag,50kg bag,Jumbo bag,Crate package ect.
 
Application:
Water conservancy,Grinding,Filter material,Barbecue charcoal,Garden landscaping,
Soilless culture,Ornamental stone,ect