Silica fume is a volcanic ash high performance mineral admixture, which can fill the pores between cement particles, and at the same time generate gel with hydration products, and react with alkaline material magnesium oxide to generate gel. In cement-based concrete, argamassa, concreto, exterior wall insulation, grout and refractory casting materials, mixed with the right amount of silica fume, what exactly are the benefits? Silica fume supplier – Henan Superior Abrasives to introduce to you.
1. Improve pumping performance
Silica fume makes high-strength concrete ( C70 or above), which significantly improves the strength and pumping performance of concrete.
2. Production of high permeability type concrete
Manufacture of high impermeability (≥ P30 ), concreto estrutural auto-impermeável, usado em metrôs, túneis, high-rise buildings in the basement.
3. Enhance the wear resistance of concrete
A distribuição do tamanho das partículas de sílica ativa é razoável, denso, dureza, boa resistência ao desgaste, pode melhorar significativamente a cura de tração, compressivo, resistência ao impacto e resistência ao desgaste, a resistência ao impacto pode ser aumentada 0.5-2.5 vezes.
4. Change the adhesive property
A sílica ativa pode aumentar a condutividade térmica, change the adhesion and increase the flame retardant properties.
5. Prevent cracking
Pode reduzir a temperatura máxima exotérmica da reação de cura da resina epóxi, reduzir o coeficiente de expansão linear do material curado e a taxa de encolhimento do material curado, thus eliminating the internal stress and preventing cracking.
6. Reduce and eliminate precipitation
Due to the fine particle size and reasonable distribution of micro-silica powder, it can effectively reduce and eliminate the precipitation and delamination phenomenon.
7. Good insulation performance
Fumaça de sílica is pure, baixo teor de impurezas, propriedades físicas e químicas estáveis, so that the cured material has good insulation properties and anti-arc performance.
8. Extend the life
Manufacture of marine and chemical concrete, devido às suas propriedades de alta densidade, prevenir eficazmente a penetração de íons sulfato e cloreto no concreto, erosão, para evitar a corrosão do reforço de concreto, prolongando assim a vida útil do concreto.
9. Improve anti-cavitation ability
A composição química da sílica fumaça é dióxido de silício (SiO2), which is an inert material and does not react chemically with most acids and alkalis. The silica fume is evenly distributed and covered on the surface of the object, which has a strong anti-corrosion ability and increases the anti-cavitation ability by 3-16 vezes.
10. Cost reduction
Micro-silica powder has small stacking density: um entre 0.2-0.8 and one between 1.0-2.2. As a polymer filler material, it is less than other mineral fillers, and the loading weight is small, saving the amount of polymer, para que possa reduzir o custo do produto.
11. Micro-silica powder frost resistance
After 300-500 cycles of rapid freezing and thawing, the relative modulus of elasticity of microsilica powder is 10-20% lower than that of ordinary concrete, which is 30-73% lower than that of ordinary concrete through 25-50 ciclos. Portanto, pode melhorar a resistência ao gelo do concreto.
12. Resistência inicial da sílica ativa
Micro-silica powder concrete makes the induction period shorten and has the characteristics of early strength. Essas características são muito boas.
13. Extremely strong activity of silica fume
With water-reducing properties, it is suitable for early-strength and high-strength concrete admixture needed for rapid construction. Admixture for high-strength shotcrete used for support during the construction of tunnels, subways and large pit structures. Admixture for concrete used in underwater construction projects (como: bridge piers, barragens, plataformas de perfuração, etc.).
Now, I believe you have understood why you need to add silica fume in concrete, silica fume in water conservancy, autoestrada, projetos de pontes, concrete not only need the above basic indicators, but also on its wear resistance, scouring resistance has very demanding requirements, mixed with micro-silica powder is very necessary. Showing the superior physical properties of silica fume concrete at the same time, but also economic, cost-effective and other advantages, attracting the attention of a large number of concrete manufacturing enterprises.
Importação de abrasivos superiores de Henan & Export Co., Ltda has more than 20 years experience in silica fume production, if you have any questions and demands about micro silica powder, welcome to contact us through sales@superior-abrasives.com email, we will reply to you as soon as possible.
