Microsilica powder can fill pores between cement particles

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Time of issue:2019-05-13 10:07
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Microsilica powder can fill pores between cement particles

The microsilica powder can fill the pores between the cement particles, and simultaneously form a gel with the hydration product, and react with the alkaline material magnesia to form a gel. In cement-based concrete, mortar and refractory castables, the addition of an appropriate amount of silica fume can play the following roles:

1. Significantly improve pressure resistance, flexural resistance, impermeability, corrosion resistance, impact resistance and wear resistance.

2. It has the functions of retaining water, preventing segregation, bleeding, and greatly reducing the pumping resistance.

3. Significantly extend the life of the crucible.

4. Significantly reduce the falling ash of the spray raft and castable, and increase the thickness of a single spray.

5. It is an essential component of high-strength, and has been applied to C150砼.

6. It has about 5 times the effect of cement. It can be used in common concrete and low cement castables to reduce cost and improve durability.

7. Effectively prevent the occurrence of strontium aggregate reaction.

8. Improve the compactness of the cast refractory. When coexisting with Al2O3, it is easier to form a mullite phase, which has high temperature strength and enhanced thermal shock resistance.

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