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, mørtel, beton, 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 ), strukturel selvvandtæt beton, bruges i undergrundsbaner, tunneler, high-rise buildings in the basement.
3. Enhance the wear resistance of concrete
Partikelstørrelsesfordelingen af silicarøg er rimelig, tæt, hårdhed, god slidstyrke, kan forbedre hærdningen af trækstyrke væsentligt, komprimerende, slagstyrke og slidstyrke, slagfasthed kan øges med 0.5-2.5 gange.
4. Change the adhesive property
Silica-røg kan øge den termiske ledningsevne, change the adhesion and increase the flame retardant properties.
5. Prevent cracking
Det kan reducere den eksoterme spidstemperatur af epoxyharpikshærdningsreaktionen, reducere den lineære ekspansionskoefficient for det hærdede materiale og krympningshastigheden af det hærdede materiale, 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
Silica røg is pure, lavt indhold af urenheder, stabile fysiske og kemiske egenskaber, so that the cured material has good insulation properties and anti-arc performance.
8. Extend the life
Manufacture of marine and chemical concrete, på grund af dets høje tætte egenskaber, effektivt forhindre indtrængning af sulfat- og kloridioner på betonen, erosion, for at undgå korrosion af betonarmering, derved forlænger betonens levetid.
9. Improve anti-cavitation ability
Den kemiske sammensætning af silica-røg er siliciumdioxid (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 gange.
10. Cost reduction
Micro-silica powder has small stacking density: en imellem 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, sparer mængden af polymer, så det kan reducere prisen på produktet.
11. Micro-silica powder frost resistance
After 300-500 cyklusser med hurtig frysning og optøning, 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 cyklusser. Derfor, det kan forbedre betonens frostbestandighed.
12. Silica røg tidlig styrke
Micro-silica powder concrete makes the induction period shorten and has the characteristics of early strength. Disse egenskaber er meget gode.
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 (som f.eks: bridge piers, dæmninger, boreplatforme, osv.).
Now, I believe you have understood why you need to add silica fume in concrete, silica fume in water conservancy, motorvej, broprojekter, 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.
Henan Superior Slibemidler Import & Eksport Co., Ltd 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, vi vil svare dig så hurtigt som muligt.
