What is micro silica powder? Micro silica fume powder (scientific name "silica fume", Microsilica or Silica Fume) is an amorphous form collected by specially designed dust collectors after oxidizing the silicon vapor discharged from the flue when smelting ferrosilicon and industrial...Send InquiryChat Now
What is micro silica powder?
Micro silica fume powder (scientific name "silica fume", Microsilica or Silica Fume) is an amorphous form collected by specially designed dust collectors after oxidizing the silicon vapor discharged from the flue when smelting ferrosilicon and industrial silicon.
Silica powder (Sio2). The average particle size of the microsilica is 0.1-0.15 μm, which is a few percent of the average particle size of the cement. The specific surface area is 15 -27 m2/g and it has a very strong surface activity.
The specifications of micro silica powder
According to the SiO 2 content of micro silica powder, the micro silica powder are divided into three specifications: 85%--95%.
Physical properties and chemical composition of micro silica powder:
1. Basic physical properties of micro silica powder:
Present form: amorphous ultrafine (non-crystalline) powder
Typical color: gray and white (natural state is white, with the increase of density, the color gradually deepens)
Specific surface area: 15 ~ 27 m2 / g
loose bulk density: 150 to 200kg/m3
Activity index: ≥85%
Water requirement ratio: ≤125%
The effects of micro silica powder in readymix
micro silica powder is a kind of highly active, amorphous spherical particles, the main component of silica, fineness and specific surface area is 80-100 times that of cement, in the concrete using the right amount of silica fume, can be To the following effect:
1.Significantly improve the compressive, flexural, impermeability, anti-corrosion, impact resistance and wear resistance of concrete;
2.It has the function of keeping water, preventing segregation, bleeding, and greatly reducing pumping concrete pumping resistance;
3. significantly prolong the service life of concrete, especially in the harsh environment of sulfate erosion, chlorine salt pollution, high humidity, etc., can increase the durability of concrete more than 1 times;
4. Significantly reduce the falling ash of shotcrete and increase the thickness of its single spray layer;
5. It is an essential component of ultra-high-strength concrete and has been used in engineering of C150 concrete;
6. with about 5 times the effect of cement, used in ordinary concrete can reduce costs;
The main application areas are:
Commercial concrete, high-strength concrete, self-leveling concrete, impermeability concrete, high-strength non-shrink grouting material, abrasion-resistant industrial flooring, repair mortar, polymer mortar, thermal insulation mortar, concrete compacting agent, concrete antiseptic, surface cement-based waterproofing agent .
Application of micro silica powder in readymix
High-rise buildings, seaport wharfs, reservoir dams, water conservancy culverts, railway highway bridges, subways, tunnels, airport runways, concrete pavements, and mine roadway anchors and sprays.
Should you have any interest in our micro silica fume powder for readymix, welcome to contact us. With over 8 years experience in this field, our factory pays high attention to quality. Please rest assured to buy. Low price, fast delivery and excellent service are offered.