Vermiculite Products

Vermiculite Products

HDM

Vermiculite is the mineralogical name given to hydrated laminar magnesium-aluminium-iron silicate.

It has the remarkable ability to expand to many times its original volume when heated – a property known as exfoliation, which occurs at right angles to the strong basal cleavage. This property is the basis for its commercial use.

      

          PURE VERMICULITE                              VCF MIX MORTAR

 

APPLICATION:

Construction Industry:

  • Bitumen Coated Screeds: This type of screed has the advantages of low thermal conductivity, low moisture content and ease of placement.
  • Lightweight Concretes: Vermiculite concretes may be used for in situ roof and floor screeds and in the fabrication of pre-cast products. Vermiculite concretes can also be used around back boilers and as a fire back support material.
  • Vermiculite Plasters: can be made with either gypsum or Portland cement.
  • The advantages of vermiculite plasters are: improved coverage; lighter weight; improved workability; excellent fire resistance; reduced thermal conductivity; improved adhesion to a wide range of backgrounds; increased resistance to cracking and shrinkage,  also improves the spall resistance of plasters due to the ability of vermiculite particles to accommodate dimensional change.
  • Loose fill Insulation:  can be used between joists in lofts for house insulation. The insulating properties of vermiculite significantly reduce the loss of heat in cold weather and keep the interior cool in hot weather. It also functions as a sound absorbent material.

 

 

High Temperature and Industrial Insulation:

  • Boards, panels and premixed coatings:  These coatings have been used in the petrochemical industry and tunnel construction.
  • Special coatings are produced with vermiculite milled before or after exfoliation according to the range of particle sizes required. This may be used for the production of anti-drumming coatings; condensation control paints; high performance gaskets and seals and for upgrading the fire resistance of organic foams and other polymer based systems.

Refractory and high temperature insulation:

For this, Vermiculite is normally bonded with alumina cements, fire clays and silicates to produce a wide range of vermiculite products which, depending on type and application can withstand hot face temperatures of up to 1,100ºC.

The types of refractory products made using vermiculite are:

  • pre-fired clay bonded insulation firebricks;
  • cast able high alumina concretes for back up insulation;
  • high alumina bonded bricks, slabs and special shapes;
  • Silicate bonded insulating shapes and molded products.

Steelworks and Foundries:

  • Due to vermiculite’s refractory properties, good thermal insulation and low density, it is used for hot topping molten steel to reduce heat loss from ingots and ladles and generally as a loose-fill insulator.
  • Silicate bonded shapes and blocks: Pressed vermiculite block insulation can be used in high temperature kilns, furnaces, combustion plants, boilers, wood burning stoves and night storage heaters.
  • It is widely accepted as an alternative for asbestos or man-made mineral fiber insulation. The units can vary from simple blocks to very intricate shapes designed to accommodate electrical elements, fixing screws etc

Automotive Industry:

Vermiculite is now used extensively in the friction lining industry (e.g. brake and clutch linings) as a safe alternative to asbestos, and plays an important role in this field.

Packaging Materials:

Exfoliated vermiculite is a useful packaging medium

  • due to its lightweight, clean and easily poured around irregular shaped objects,
  • it also provides a good baffle against shocks caused by impact and improper handling.
  • Being highly absorbent, it safely retains leaks from packed materials such as hazardous chemicals.
  • As it is inorganic it does not present any potential fire hazards can also be used as a packing material for storing fruit, bulbs and tubers.
  • Being soft and non-abrasive it has also been used effectively for insulation and cushioning the base of plastic-lined swimming pools.

Roof Heat Proofing Method

Due to vermiculite’s refractory properties, good thermal insulation and low density, It is used for heat reduction on open terrace in high raise buildings. It could also act for water proofing as well.

 

Cold Storage: Application of VCF Mortar on the outside walls of cold storage location. Due to its good thermal insulation property, the external heat is blocked. Thus due to the stoppage of external heat on the walls, the cold storage works more efficiently.

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