99% Undensified Silica Fume

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99% Undensified Silica Fume

99% Undensified Silica Fume

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99% Undensified Silica Fume is a micro-silica fume with 99% SiO2 content, and the Bulk density is 250-400kg/m³.

Silica fume, also called Microsilica or micro silica, is a byproduct of production silicon metal or ferrosilicon alloys. Silicon metal and alloys are produced in electric furnaces.The raw materials are quartz,coal and woodchips. The smoke that results from furnace operation is collected and sold as silica fume, silica fume consists primarily of amorphous(non-crystalline) silicon dioxide(SiO2), its average granule diameter is 0.15~0.20um, specific surface area is 15000~20000m2/kg,and it has extremely strong surface active.

Basic Attributes

  • Very low permeability to chloride and water intrusion.
  • Extremely high resistivity (20 to 100 times greater than normal concrete).
  • Increased abrasion resistance of decks, floors, highways and marine structures.
  • Excellent resistance to chemical attack by chlorides, acids, nitrates and sulfates.



  • Water conservancy and hydropower engineering: in the anti-seepage and anti-abrasion parts, after mixing with micro-silica powder, it can greatly improve the anti-seepage, anti-cracking, anti-abrasion and anti-cavitation performance.
  • The production of high-strength concrete: silica powder as admixture to make high-strength concrete, the actual application of its strength level can be achieved 100Mpa.
  • Seaport engineering: concrete mixed with silica powder can improve the concrete’s anti-abrasion performance, anti-seepage performance, to prevent electrochemical corrosion of reinforcing steel.
  • Traffic engineering: silica powder concrete used in highway pavement and aircraft runway, can greatly improve the early strength and wear resistance of concrete, in the maintenance and repair of highway pavement, you can advance the opening time and increase the economic benefits.
  • Shotcrete: significantly improve the adhesion performance and cohesion of plastic concrete, significantly reduce the amount of rebound, increase the thickness of shotcrete once formed, shorten the construction period and save the cost of the project.


The only silica fume factory in China that uses machine packaging.
We can also produce according to your requirement.
The machine is automatically packed and filtered by a screen, so that no debris is mixed in.

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All information provided will be kept confidential.

Chinese Leading Silica Fume Manufacturer

HSA has advanced production equipment and standard experimental instruments, and maintains close contact and strategic cooperation with many famous multinational corporations. 

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