Refractories Micro Silica Fume White SF High Purity Silica Powder
White Micro Silica Fume Powder for Refractories/Shotcrete/Concrete/Cement/Motar
1. White Micro Silica Fume Introduction
White microsilica, is also called zirconia silica fume. a compound of zirconium dioxide, zirconium oxide melting products, collected by special device during the production of Zirconia, not only has the general characteristics of sillca, but also a certain amount of zirconia powder.
When it is used in concrete, it acts as a filler and as a cementitious material. The small microsilica particles fill spacesbetween cement particles and between the cement past matrix and aggregate particles. Microsilica also combines with calcium hydroxide to form additional calcium hydrate through the pozzolanic reaction. Both of these actions result in a denser, stronger and less permeable material.
2. Specifications
|
Analysis (%) |
Model No. |
||||
|
97# |
94# |
90# |
88# |
85# |
|
|
SiO2 (Min.) |
97.0 |
94.0 |
90.0 |
88.0 |
85.0 |
|
Al2O3 (Max.) |
1.0 |
1.0 |
2.0 |
-- |
-- |
|
Fe2O3 (Max.) |
1.0 |
1.0 |
2.0 |
-- |
-- |
|
CaO+MgO (Max.) |
1.0 |
1.0 |
2.0 |
-- |
-- |
|
K2O+Na2O (Max.) |
1.0 |
1.5 |
2.0 |
-- |
-- |
|
C (Max.) |
1.0 |
2.0 |
2.0 |
2.5 |
3.0 |
|
NaOH (Max.) |
1.0 |
3.0 |
3.0 |
4.0 |
4.5 |
|
PH (Max.) |
4.5~6.5 |
4.5~7.5 |
4.5~7.5 |
4.5~8.5 |
4.5~8.5 |
|
Size above 45um (Max.) |
3.0 |
3.0 |
5.0 |
8.0 |
8.0 |
|
M2/g (Max.) |
1.0 |
2.0 |
2.5 |
3.0 |
3.0 |
3. General advantages
1. Dense castables
2. Improved flow
3. Hot strength
4. Strength during heat-up
4. Characteristics
1) High early strength.
2) Greater impermeability.
3) High ultimate compressive strengths.
4) Substantially greater resistance.
5. Package
As required.
6. Applications
Silica fume is widely used in concrete field: High-performance project, such as bridge, airport, hydropowder station, seawall, railway projects.
1) Enhance the mechanical properties of concrete.
High strength and early strength has been used in substructures of high-performance concrete.
2) Improve the durability of concrete:
Significant improvements can be seen in the permeability resistance, abrasion resistance, anti-corrosion against chlorideion and anti-freezing of concrete.
3) Enhance consructability.
Improve shotconrete, increase easily strength, control temperature contractors can take advantage of the properties of silica fume concrete to expedite projects or to achieve properties that might otherwise be impossible to achieve.
4) For mortar and concrete in : high-rise buildings, the harbor docks, dams, water culvert, railway public bridges, subways, tunnels, airport runways, concrete pavement and the coal mine tunnel shotcrete reinforcement.
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