CETEX MICROSILICA is a super pozzolan - a finely powdered material which when added to cementitious matter increases durability and gives higher strength. It complies with ASTM C1240.

HOW IT WORKS

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

Ordinary Portland Cement (OPC) + H₂O → CSH (Calcium                                                   Silicate Hydrate) + Ca(OH)₂(Free Lime)

The free lime does not contribute to strength of concrete. 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 deterioration.

When CETEX Microsilica 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 the cement. It gets well distributed in the cementatious paste, thus blocking the bleed-water channels.

PACKING

Available in 25 kg Plastic bag or Jumbo Bag.

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CETEX MICRO-SILICA

PROPERTIES

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