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What is the effect of adding industrial silica powder to concrete?

Date: Dec 30th, 2022
Adding industrial silica powder to concrete can significantly improve the strength of concrete, so the application of silica fume in concrete is very common. Specifically, what are the advantages of adding silica powder to concrete?

1. The high strength concrete made of silica fume (above C70) can significantly improve the strength and pumping performance of concrete;

2. Silica powder has reasonable particle size distribution, strong density, high hardness and good wear resistance, which can greatly improve the tensile strength, compression strength, impact strength and wear resistance of cured products, and the wear resistance can be increased by 0.5-2.5 times.

3. Silica powder can increase thermal conductivity, change adhesion and increase flame retardant.

4. Silicon powder can reduce the exothermic peak temperature of epoxy resin curing reaction, reduce the linear expansion coefficient and shrinkage rate of cured products, so as to eliminate internal stress and prevent cracking.

5. Due to the fine particle size and reasonable distribution of silicon powder, it can effectively reduce and eliminate precipitation and stratification;

6. Silicon powder has low impurity content and stable physical and chemical properties, which makes the cured product have good insulation and arc resistance.

The addition of silica fume not only has the above advantages, but also its frost resistance and activity have a very important effect on the improvement of concrete quality.