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Microsilica also known as Silica fume, it is very fine pozzolanic material, composed of amorphous silica produced by electric arc furnaces as a byproduct of the production of elemental silicon or ferro silicon alloys. Microsilica can be used in a variety of cementitious products such as concrete, grouts and mortars as well as elastomer polymer, refractory, ceramic and rubber applications.

Micro Silica is a by-product material which consists of non-crystalline silicon dioxide with high specific surface area and high pozzolanic reactivity. Use of it in concrete as pozzolanic material has demonstrated significant influence in improving the mechanical and durability properties. Micro Silica is a highly pozzolanic material. The non-crystalline silica and high specific surface area of our product are responsible for its high pozzolanic reactivity.

Application & Usage

  • High performance concrete
  • High strength, low permeability concrete
  • Mass Concrete, Pre-Cast Concrete
  • Concrete in marine environments
  • Self-compacting Concrete
  • Industrial flooring
  • Water tanks and sumps
  • Chemical storage tanks
  • Basements and sewerage pipelines
  • Refractory mixes etc
  • Rubber industry application
  • Anti-caking agent
  • Pellet binders
  • Water glass industry
  • Drilling industry
  • Paint Industry

Chemical Properties

SiO2 - Silica 90 % Min
Moisture 2 % Max
Particle size <25 Micron
Colour Grey
Loss on ignition at 800°C 4 % Max
pH value 8
Specific Surface Area(B.E.T.) > 16m2/gm
Bulk Density(Kg/ m3) 550-600
Pozzolanic Activity Index (7 Days) Min. 105%
Pozzolanic Activity Index (28 Days) Min. 117%


Suhal Group believes that good product comes in better packaging. As a result high quality HDPE Bags with liners are used to pack its products. Packing is available in 10-50 Kgs, 500-1000 Kgs HDPE Jumbo Bags with liners or as per customers need and requirements.