Waltar Enterprises
DBS House, Prescott Road,
Opp. Cathedral Sr. School, Fort,
Mumbai, Maharashtra 400 001 INDIA
India
ph: +91 93222 13698
fax: +91 22407 79200
info
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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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
Copyright 2011 Waltar Enterprises.
All rights reserved.
Waltar Enterprises
DBS House, Prescott Road,
Opp. Cathedral Sr. School, Fort,
Mumbai, Maharashtra 400 001 INDIA
India
ph: +91 93222 13698
fax: +91 22407 79200
info