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Vermiculite V4 Coarse

Applications

  • Loft insulation
  • Packaging
  • Loose-pour aggregate
  • Backfill for firebacks and boilers
  • Firebase embers
  • High temperature insulation
  • Wicking agent
  • Chimney lining
Vermiculite V4 Leaflet for download (2.65mb)

Chemical Properties

Vermiculite V4 is an aluminium iron silicate. Typical composition is:

Silicon (SiO2)

37 - 40%

Magnesium (MgO)

21 - 29%

Aluminium (Al2O3)

6 - 10%

Iron (Fe2O3)

4 - 8%

Potassium (K2O)

3 - 6%

Calcium (CaO)

1 - 4%

Carbon (CO2)

1 - 2%

Titanium (TiO2)

0.5 - 1%

Floride (F)

0.1 - 0.75%

Chromic Oxide (CrO3)

0.05 - 0.15%

Phosphorus Pentoxide (P2O5) 0.01 - 0.90%
pH* 7 - 10
Organic Matter Nil

* pH 7-10, but owing to the presence of associated carbonate rock impurities the reaction is normally alkaline.

 

Physical Properties

Exfoliated Vermiculite V4 is golden brown granule in plate-like layers of a concertina appearance.

Sintering Temperature

1200 -1260oC

Melting Point

1330oC

Specific Heat

1.08 Kj/kgK

Thermal Condcuctivity at normal atmospheric temperature

K = 0.062 - 0.065 w/mc

 

Grading Specifications

The bulk density is 70-85 kg/m3 at the bagging head. However, a 10-15% increase in density should be allowed for in normal storage, handling and transport.

Grading Specification - % by weight passing

8.0

65 - 90

4.75

20 - 50

3.35

5 - 30

2.36 2 - 20

1.18

0 - 10

 

Packaging

Vermiculite V4 is normally supplied in plastic sacks containing 100 litres (approximately 3.5ft3). Alternative packaging is available to order.

 

Health and Safety

Exfoliated Vermiculite V4 is a heat-processed, inorganic material and since no chemical changes occur it is considered non-reportable. It is also fibre-free, conpletely non-irritant, an inert, incombustible, non-abrasive, rot-proof, odouless, clean to handle and without the slighest danger to face of hands. However, as with all fine materials, inhalation of dust should be avoided.

CE Performance Declaration

In compliance with the Construction Products Regulation (EU) No 305/201 Silvaperl make the attached declaration of performance with respect to the product.  Download.

 

Silvaperl Products
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