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Micro Silica

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Product Code : Micro-silica

Brand Name : CETEX

Price And Quantity

Minimum Order Quantity
25 Kilograms
Price Range
13.00 - 20.00 INR/Kilograms

Product Specifications

Appearance
Drak Grey Colour Fine Powder
Grade
Industrial

Physical Form
Powder
HS Code
28112200

Smell
No Smell
Molecular Formula
SiO2

Color
Other
Chemical Name
Silica Fume

Type
SiO2 – Silica
Usage
Concrete Additive; Refractory Additive

Water Content
Humidity - 1%
Application
Concrete Additive; Refractory Additive

Product Description

Advantage

Higher compressive strength by 10-20 %
Reduces the rate of carbonation
Lower permeability â resistance to penetration of water, chloride & other chemicals
Lower free lime formation - delays ettringite and thaumasite formation
Controls bleeding in fresh concrete
Lower Heat of Hydration, which prevents formation of cracks.

How it work

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

Ordinary Portland Cement (OPC) + H2O â 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+ SiO₂â H₂0 + CSH

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

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.

Properties

Appearance	Very fine powder
Colour	Grey
Odour	Odourless
Mean particle size	25 microns
SiO₂â Silica	85 % minimum
Humidity	2 % maximum
Loss on ignition at 800Â°C	4 % maximum