92% Undensified Silica Fume
92% Undensified Silica Fume
Tags:92U Microsilica,92% Undensified Silica Fume Archives,92 Grade Silica Fume for Refractory,92 Grade Silica Fume for Concrete,92 Grade Silica Fume for Oil Well
92% Undensified Silica Fume is a micro-silica fume with 92% SiO2 content, and the Bulk density is 240-320kg/m³.
Particle morphology and mineral structure: during the formation process of silica fume, the amorphous phase is formed by the action of surface tension due to the effect of surface tension during the formation of phase change, and the surface is smooth. Some are aggregates with multiple spherical particles adhered together. It is a very high surface area and highly active volcanic ash. With silica fume, tiny spheroids can be lubricated.
The appearance is grey powder, SiO2 content is 92% and has high densified and semi densified products. It can be applied to large concrete, high-speed rail, bridge and other projects, and is used as a necessary admixture.
Ewende can provide 85 grade silica fume, 90 grade silica fume, 92 grade silica fume, 94 grade silica fume, 95 grade silica fume, 96 grade silica fume and 99.99 grade silica fume.We can also produce according to your requirement.
92% Undensified Silica Fume Advantage
92% Undensified Silica Fume Parameters
|National Standards for Silica Fume for Concrete|
|National Standards and Organizations||Europe||Norway||France||Australia||United States||Canada||Japan||China|
|Standard Code||CEN EN||NS||NF||AS||ASTM C||CSA||JIS||GB/T||GB/T|
|SiO2 % ≥||85||85||85||85||85||85||85||85||85|
|SO3 % ＜||2||2.5||3||1||3|
|CI－ % ＜||0.3||Report||0.2||Report||0.1||0.1||0.1|
|CaO % ＜||1||2||1|
|MgO % ＜||5|
|Si % ＜||0.4||0.4|
|Na2O+K2O % ＜||4||1.5|
|C % ＜||4|
|Water Content % ＜||2||3||3||3||3|
|Burn Vector % ＜||4||5||6||6||6||5||6||4|
|Specific Surface Area ㎡/g||15-35||≥12||20-35||≥15||≥15||≥15|
|45μm Sieve Residue % ＜||10||10||5|
|Loose capacity kg/m³||Report||Report|
|Specific Gravity g/㎝³||2.1-2.3||Report|
|Water Demand Ratio % ≤||125||125|
|Volcanic Ash Activity Index||%（3d) ≥|
|Water to Glue Ratio||0.5||0.5||0.484||0.5||0.5||0.5|
92% Undensified Silica Fume Application
The high resistivity and low permeability of micro-silica sprayed concrete in the project can reduce the corrosion of steel bars and wire mesh by chlorides, reduce the amount of rebound, reduce permeability, and improve the durability of freezing and thawing. Improved bending and compressive strength.
Micro silica fume can be used as a binder, active agent and mineralizer for refractory materials and kiln furniture materials, which is conducive to improving the solid-phase reaction and sintering driving force of refractory materials, enhancing the reaction speed and sintering density of materials, and is conducive to crystal transformation. performance of the material.
Using silica fume as the main raw material to prepare composite silicate thermal insulation materials has gradually become a hot spot in the application of silica fume. Composite silicate thermal insulation coating is one of the most widely used thermal insulation coatings at present. It belongs to barrier type thermal insulation coating.
Silica fume can improve the performance of concrete mixture, reduce air bubbles on the surface of concrete, improve the strength of concrete surface, make the surface of concrete smooth, inhibit the carbonation of concrete, resist the erosion of harmful external media, and help improve the durability of concrete. help improve the durability of concrete.
By adding micro silica fume, optimizing concrete mix ratio, temperature control and other technical means, the PHC pipe pile can be realized without high-pressure steam curing and energy-saving technology, which not only simplifies the process, but also greatly reduces coal and electricity consumption, and also reduces carbon dioxide. emission.
Concrete mixed with silica fume is mainly used in water cushions, ponds, flood discharge tunnels and other parts. As an auxiliary cementitious material, microsilica fume can significantly improve the strength of cement stone in the concrete matrix, and at the same time greatly improve the relationship between cement stone and aggregate. between the bond strength.
Adding micro silica fume to oilfield cement can improve the thermal stability of oilfield cement, change the C/S ratio of cement, and change the composition and structure of cement hydration products. With the addition of different amounts and ambient temperatures, it can be obtained A series of hydration products with good stability, high strength and low permeability.
There is no fine sand in the permeable concrete, and the porosity is relatively large. A small change in the water-cement ratio of the blank sample can cause a large change in the fluidity of the mixture. The water-cement ratio is difficult to control, and the water-cement ratio can be significantly improved by adding silica fume. workability of fresh concrete mixtures.
Micro silica fume is used in high-grade high-performance low-cement refractory pouring materials and prefabricated parts. The service life is three times that of ordinary castables, the refractoriness is increased by about 100°C, and the high-temperature strength and thermal shock resistance are significantly improved. It has been widely used in ceramic industries.
Micro silica fume is used for agricultural fertilizer and improved soil varieties. Micro-silica fume is mixed with potassium hydroxide or potassium carbonate and heated to make potassium silicate slow agricultural fertilizer. It is not easy to volatilize and lose, can protect the soil, promote the development of crop roots, and inhibit pests and diseases.
1, 92% Undensified Silica Fume used for mortar and concrete in high-rise buildings, wharves, dams, water conservancy, railways, highways, bridges, culverts, tunnels, subways, airport runways, concrete pavements and coal roadway anchor reinforcement.
2, 92% Undensified Silica Fume In the material industry:
(1) high-grade, high-performance, low cement refractory castables and prefabricated parts, the service life is three times of ordinary castables, the refractoriness is increased by about 100℃, and the high-temperature strength and thermal shock resistance are obviously improved. 92% Undensified Silica Fume has been widely used in the industries of coke ovens, iron making, steelmaking, rolling, non-ferrous metal, glass, ceramics and power generation.
(2) large iron runner and ladle materials, air-permeable bricks, and mending materials.
(3) the construction and application of self-flow refractory castable material and dry wet injection.
(4) the oxide–bonded silicon carbide products (ceramic kiln furniture, flame-sheet, etc).
(5) high-temperature calcium silicate lightweight heat insulation material.
(6) the corundum mullite is used to push the plate into the electric porcelain kiln.
(7) high-temperature wear-resistant materials and products.
(8) corundum and ceramic products.
(9) Sialon bonded products. In addition to the widespread use of castable refractory materials, a large number of applications have been obtained in electrofusion and sintered refractory materials.
3, 92% Undensified Silica Fume in the new wall materials, decorative materials:
(1) wall insulation polymer mortar, thermal insulation mortar, interface agent.
(2) cement-based polymer waterproof material.
(3) light aggregate heat preservation and energy-saving concrete and products.
(4) the inner and outer wall buildings are processed with putty powder.
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