China Expaned Vermiculite for Roof Floor Screeds Insulating Concretes

China Expaned Vermiculite for Roof and floor screeds and insulating concretes
What is vermiculite?
Vermiculite is the name of a group of hydrated laminar minerals (aluminum-iron magnesium silicates) which look like mica.
Vermiculite deposits are associated with volcanic ultramafic rocks rich in magnesium silicate minerals, and flakes of the mineral range in color from black to shades of brown and yellow. The crystal structure of vermiculite contains water molecules, a property that is critical to its processing for common uses.
Using a process called exfoliation - in which vermiculite flakes are heated to 900 degrees Celsius or higher, causing water within the flakes to flash to steam and expand - crude vermiculite ore is processed into particles that are eight to 20 times larger. The resulting lightweight material is chemically inert and fire resistant, with low density and low thermal conductivity. It is also odorless, has high liquid absorption capacity and catalytic properties.
Features:

Insulation:

Roof and floor screeds and insulating concretes: exfoliated vermiculite (typically the finer grades) can be added at site to Portland cement and other aggregates, rheological aids and water to produce roof and floor concrete screeds or lightweight concrete which have the benefit of being lightweight and insulating. In many cases vermiculite based roof screeds are often used in conjunction with other insulation materials such as polystyrene board to form a total roofing system. A bituminous binder can also be used with exfoliated vermiculite can to produce a dry, lightweight roof screed which has the advantages of low thermal conductivity, low moisture content and ease of placement by pouring from the bag and then tamping.

As loose-fill insulation: Exfoliated vermiculite treated with a water repellent is used to fill the pores and cavities of masonry construction and hollow blockwork to enhance fire ratings (e.g. Underwriters Laboratories Wall and Partition designs), insulation and acoustic performance. Coarse grades of exfoliated vermiculite can be used to insulate lofts and attics. Exfoliated vermiculite has the benefit of being easy to use with application consisting of pouring the vermiculite between the joists and then leveling


Insulation- Refractory Products
Vermiculite is used in the Refractory Insulation Industry as both A Loose Fill Insulation and is also blended within Refractory Fire Bricks-Blocks to form A Lightweight Highly Insulating Brick-Block that is then used when constructing various Kilns and Ovens. It is very common to use Vermiculite as A Loose Fill Insulation between The Outer Steel Shell and The Lightweight Bricks-Blocks to further greatly enhance the heat retention of The Kiln or Oven e.g A Brick Baking Kiln will use this system. In some Kilns or Ovens there is another Heavier Harder More Wear Resistant Internal Layer of Refractory Bricks-Blocks that will also typically contain Vermiculite

Expanded Vermiculite

Characters: Inorganic, inert and aterile, non-abrasive, ultra lightweight, Fireproof etc.

Size: 20-40mesh, 40-60mesh, 1-3mm, 2-4mm, 3-6mm, 4-8mm etc.

Packing: 100L/bag, 300bags/20'fcl or 730bags/40HQ.

ItemContent %SiO237.56AL2O311.8K2O6.4Fe2O35.15MgO23CaO1.51TiO20.6H207