What are the effects of adding silica fume to concrete
Published:
2019-08-29
Silica fume added to concrete can significantly improve the strength of concrete, so the application of silica fume in concrete is very common. So, specifically, what are the advantages of adding silica fume to concrete?
Silica fume added to concrete can significantly improve the strength of concrete, so the application of silica fume in concrete is very common. So, specifically, what are the advantages of adding silica fume to concrete?
1. High strength concrete (above C70) made of silica fume can significantly improve the strength and pumping performance of concrete;
2. The silicon powder has reasonable particle size distribution, strong compactness, high hardness, and good wear resistance, which can greatly improve the tensile, compressive, impact strength and wear resistance of the cured product, and the abrasion resistance can be increased by 0.5-2.5 times.
3. Silica fume can increase thermal conductivity, change adhesive viscosity and increase flame retardancy.
4. Silica fume can reduce the exothermic peak temperature of epoxy resin curing reaction, reduce the linear expansion coefficient and shrinkage of cured products, thus eliminating internal stress and preventing cracking.
5. Due to the fine particle size and reasonable distribution of silicon powder, it can effectively reduce and eliminate precipitation and stratification;
6. The silicon powder has low impurity content and stable physical and chemical properties, so that the cured product has good insulating properties and arc resistance.
In addition to the advantages mentioned above, the frost resistance and activity of silica fume also have a very important impact on the improvement of concrete quality.
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