Micro silica


Silica Fume also known as micro silica is a non-crystalline polymorph of silicon dioxide, silica.
Silica fume is added to Portland cement concrete to improve its properties and features, in particular its compressive strength, bond strength and abrasion resistance. Addition of silica fume also reduces the permeability of concrete to chloride ions, which protects the reinforcing steel of concrete form corrosion. The advantage of using micro silica can be considerable as it reduces thermal cracking caused by the heat of cement hydration and it can improve durability attack by sulphate and acidic waters.

 

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