Grey Densified Silica Fume , 800Kg/m3 85% Concrete Silica Fume
85% Densified Micro Silicafume for Large-scale Concrete Engineering, Mortar, Floor, Pipe, Pile etc.
1. Micro Silica Fume Introduction
Densified Silica Fume is the most revolutionary concrete additive to have been developed in recent times. Densified microsilica fume, with twice the bulk density, provides many benefits. It is dustless, uniform, smooth, free of lumps and flows readily for bulk handling applications.
Silica Fume Properties.
2. Specifications
| Analysis | Result | ||||
| SF85 | SF88 | SF90 | SF92 | SF94 | |
| SiO2(%) | 85.72 | 88.5 | 91.6 | 93.67 | 96.94 |
| Fe2O3(%) | 0.7 | 0.65 | 0.35 | 0.2 | 0.2 |
| Al2O3(%) | 0.38 | 0.26 | 0.22 | 0.2 | 0.2 |
| CaO+MgO(%) | 0.4 | 0.36 | 0.36 | 0.3 | 0.3 |
| K2O+Na2O(%) | 0.3 | 0.28 | 0.2 | 0.2 | 0.2 |
| Moisture(%) | 1.77 | 1.66 | 1.66 | 0.82 | 0.91 |
| Loss on lgnition(L.O.I)@975℃ (%) | 3.6 | 2.92 | 2.07 | 1.92 | 1.91 |
3. General advantages
● Lowers concrete permeability.
● Significantly increases concrete durability.
● Increases ultimate strength gain.
● Beneficial in all types of high strength concrete applications.
● Improves bond strength to steel.
● Significantly reduces alkali-silica reactivity.
● Provides excellent resistance to sulfate or seawater attack.
● Reduces steel corrosion.
4. Characteristics
Silica Fume Concrete Mix Design- Silica Fume Cement
● Silica fume (microsilica) is a byproduct of producing silicon metal or ferrosilicon alloys. One of the most important uses for micro silica fume is in concrete. Because of its physical and chemical properties, it is a very reactive pozzolan. Concrete with silica fume will have very high strength and can be very durable. Silica fume is available for concrete admixtures suppliers and, it's simply added during concrete production.
● Because of fine particles, large surface area, and the high SiO2 content, silica fume is usually used as a mineral admixture in concrete. Silica-fume concrete with a low water content is highly resistant to penetration by chloride ions. More and more transportation agencies are using silica fume in their concrete for construction of new bridges or rehabilitation of existing structures.
● Silica fume for use in concrete is available in wet or dry forms. It is usually added during concrete production at a concrete plant. Silica fume-concrete has been successfully produced in both central-mix and dry-batch plants.
5. Applications
Silica Fume Used in Concrete ( Silica Fume Concrete Admixture)
● Increasing strength
● Increasing density
● Frost resistance
● Early strength
● Abrasion resistance performance, anti-cavitations
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