PROFIX - CONSTRUCTION INDUSTRY

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• SILICA FUME (Micro Silica)
  
  
  This product ismade from chimney stacks of rice husk burners . white in colour. We supply silica fume(micro silica) with the following specifications.
  
  CHEMICAL COMPONENTS
  
  

  Chemical content	G/Spec	Typical
  SiO2	90% min	92.8-94%
  Al2O3	1.5% max	0.72%
  Fe2O3	3.0% max	0.81%
  CaO	--	0.15%
  MgO	--	0.45%
  K2O	--	0.95%
  Na2O	--	0.25%
  C	--	0.78%
  I.G.Loss	--	1.08%
  Moisture	1% max	0.82%
  Size	-400mesh
  Packing	25kg plastic bag or 400kg jumbo bag
  Uses	For building materials

  
  
  When added to precast and ready-mixed concrete, silica fume produces high-performance, high-strength concrete with an increased life-span and improved structural economics.
  
  silica fume is available in its as-produced, undensified form. For greater convenience, we also have densified silica fume, with twice the bulk density, provides many benefits. It is dustless, uniform, smooth, free of lumps and flows readily for bulk handling applications. Dry densified silica fume is the most economical product form for transportation, as its higher density allows bulk handling methods, and reduced shipping costs.
  
  BENEFITS
  
  Prevents reinforcing steel corrosion in concrete, due to its extremely low permeability to chloride-ion intrusion and high electrical resistivity.

  • Greater impermeability, barring the ingress of moisture, chemicals and other contaminants.
  • High early strengths, assuring increased efficiency and greater cost effectiveness in production of prestressed and precast concrete.
  • High ultimate compressive strengths (8,000-20,000 psi), proportionate to amount of silica fume and the water-to-cementitious ratio.
  • Substantially greater resistance to corrosion, abrasion and erosion, chemical attack and freeze/thaw damage.
    
    

  APPLICATION
  
  silica fume is ideal for use in structures exposed to chemical and environmental attack.
  
  • Parking garages
  • Bridge decks
  • Marine structures
  • Slabs
  • Roadways
  
  In precast concrete (made in a manufacturing environment) it is more efficient, and results in cost and time savings.
  
  • High early and higher ultimate compressive strengths.
  • Eliminates steam curing.
  • Savings on heating costs and rapid turnover of forms.
  
  In shotcrete applications, there is less material waste and greater efficiency of product use.
  
  • High electrical resistivity and impermeability.
  • Significantly less rebound loss.
  • Mitigates reinforcing steel corrosion.
  • Improved bonding strength.
  • Thicker applications with each nozzle pass.
  
  HANDLING
  
  Bulk silica fume can be stored in ordinary cement silos and transported in bulk bag or cement tankers. It can be moved into cement storage silos and then handled with normal automated batching systems.
  
  PACKAGING
  
  Densified silica fume can be shipped via pneumatic tankers holding 20 to 24 tons, or in bulk "Super Sacks," 55 cubic foot polypropylene bags which hold approximately 2,000 pounds. Densified silica fume is also available in 25 pound "repulpable" paper bags and standard 50 pound bags.
  Undensified silica fume can be shipped via pneumatic tankers holding 6 to 8 tons, or in bulk "Super Sacks" which hold approximately 1,300 pounds. It is also available in standard 50 pound paper bags.