is formed when the lava stream flows and cools down with the air remains and becomes small holes in the final rock. Lava stone owe the special features such as sound absorbing and insulation,heat absorbing and preservation,water absorbing and slide –proof,acid & alkali proof ,“breathing function”.
1. Construction field: Exterior wall decoration, featuring heat insulation, heat preservation, corrosion resistance, etc. Anti-slip and noise reduction for indoor floor and wall decoration.
2. Garden landscape: Arrange garden paths to create a natural and wild atmosphere, with good water permeability to reduce water accumulation.
3. Industry and others: It is used as a filtering medium in industry to purify wastewater. The interior decoration and landscaping of the aquarium regulate the water quality.
Lava stone is formed when the lava stream flows and cools down with the air remains and becomes small holes in the final rock. Lava stone owe the special features such as sound absorbing and insulation,heat absorbing and preservation,water absorbing and slide –proof,acid & alkali proof ,“breathing function”.
Features:
1) not radiation
2) not permeation
3) not poisonous and not odor
4) green and environmental-protection products with high quality
5) hyperfine and with high quality products
6) be used in interior decoration,outside decoration and paving public square .
Application:
1) It is called as functional stone which can be used safely in any place for its low, radiation,wind erosion –proof and durability,sound absorbing and noise lowering,water absorbing and air humidity keeping,dizzy light avoiding,etc to improving our environment and feelings,
2) Therefore,this volcanic stone material can be used widely in outer wall decoration,such as road ,square paving ,living distract gardening,etc to meet our needs of nature,primitiveness,simplicity,classicalism,
3)We can supply various kinds of finished volcanic stones with differently treated surfaces,such as honed ,polished,bush hammered ,etc.with all kinds of shapes and thickness.
◆Volcanic filter material mainly used for water treatment, with irregular partical shape, dark brown or beige color , porosity mass. The particle size we offer are 2-4mm,3-6mm,5-12mm,12- 18mm or according to customer’s requirement.
Technical indicators
| index | Unit | Test result | Index | Unit | Test result |
| Volume weight | Kg/m3 | 740 | Surface acreage | m2/g | 13.6-25.5 |
| Density | __ | 1:1.29 | Compression strengh | Mpa | 5.08 |
| Water content | % | 0.9-1.0 | Shear strengh | Mpa | 3.98 |
| Porosity | % | 73-82 | Friction loss rate | % | ﹤1 |
| Organic matter removing | % | ﹥80 | membrane-forming time | hour | 27 |
| COD removing | % | ﹥85 | HCL soluble | % | ﹥801.0 |
| BOD removing | % | 75-93 | NH4,N2 removing | % | ﹥85 |
