Price And Quantity

 

Minimum Order Quantity : 20

Unit of Measure : Kilograms/Kilograms

 

Product Description

 

 

Owing to our profound knowledge of this domain, we are able to come up with Micro Silica. It is a finely powdered material, that can be added to cementitious matter. It is known for its resistance to penetration of water, chloride & other chemicals and lower permeability. Micro Silica has content of over 85%, and this complies with ASTM C1240. Apart from this. Other details regarding the offered array are as follows:

Advantages

• Lower free lime formation - delays ettringite and thaumasite formation
• Higher compressive strength by 10-20 %
• Controls bleeding in fresh concrete
• Lower Heat of Hydration, which prevents formation of cracks.

Properties

• Odour: Odourless
• Silica (SiO2): 85 % minimum; mostly 90% +
• Appearance: Very fine powder
• Colour: Grey
• Moisture: 2 % maximum
• Loss on ignition at 800°C: 4 % maximum.

HOW IT WORKS

 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.

PACKING

• Available in 20 kg Plastic bag or Jumbo Bag. 

 

Trade Information