Silica Fume - White
White Silica Fume - the Ultimate Pozzolan
20 lb pails we had some damaged bags in our last shipment, so we have a limited supply of fume we have packaged into 5 gallon pails. We have a 6 lb size suitable for small/craft projects.
White Silica Fume improves the properties of both fresh and hardened concrete. Colour varies from light to off white.
The most important property is the permeability, Lower the ingress of movement of water or chemicals; lower the adverse reactions such as sulfate attack.
The reaction between silica fume and the calcium hydroxide, released as the cement hydrates, provides a dense impermeable pore structure.
Improve the mechanical performances of concrete.
The Silica fume reacts with the cement paste to form additional strong Calcium Silicate Hydrate (CSH) providing higher strength.
Silica fume reduces bleeding and enhances the cement paste bond to the aggregates. Thanks to its pozzolanic effect (reaction with Ca(OH)2 ), and therefore to the strength improvement.
Recommended Dosage: Replace 5% to 10% of your Portland Cement
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