FOB Reference Price:Get Latest Price
US $120-140 / Metric Ton | 22 Metric Ton/Metric Tons (Min. Order)
Supply Ability:
1000 Metric Ton/Metric Tons per Month
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Quick Details
Place of Origin:
Maharashtra, India
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Packaging & Delivery
Packaging Details
20, 25, or Jumbo bag
Delivery Time
10 days


MICRO-SILICA is finely powdered material, added to concrete for higher strength & lower permeability. 25kg or Jumbo bag.



CETEX MICRO-SILICA is a super pozzolan - a finely powdered material which can be added to cementitious matter to increase durability and to provide a positive set. It complies with ASTM C1240.





ü      Higher compressive strength by 10-20 %

ü      Lower permeability – resistance to penetration of water, chloride & other chemicals

ü      Lower free lime formation - delays ettringite and thaumasite formation

ü      Controls bleeding in fresh concrete

ü      Lower Heat of Hydration, which prevents formation of cracks.




Appearance                               Very fine powder

Colour                                      Grey

Odour                                       Odourless

Mean particle size                      25 microns

SiO2 – Silica                              85 % minimum

Humidity                                   2 % maximum

Loss on ignition at 800°C                    4 % maximum





1. Pozzolonic effect :When water is added to cement, hydration occurs as shown below:


OPC + H2O CSH (Calcium silicate hydrate) + Ca(OH)2(Free lime)

The free lime does not contribute to strength. When combined with carbon dioxide, it forms a soluble salt, which leaches through the concrete causing efflorescence, a familiar architectural problem. Concrete is also more vulnerable to chemical attack and detoriation. When it is added, the following reaction takes place:


Ca(OH)2 + SiO2 H20 + CSH

The reaction reduces the amount of calcium hydroxide in the concrete.


2. Micro filler effect : It is an extremely fine material, with an average diameter much finer than cement. It gets well distributed in the paste, thus blocking the bleed-water channels.





Available in 25 kg Plastic bag or Jumbo Bag.


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