92% Undensified Silica Fume

Home / Undensified Silica Fume / 92% Undensified Silica Fume
92% Undensified Silica Fume

92% Undensified Silica Fume

Share on facebook
Share on twitter
Share on linkedin
Share on tumblr
Share on skype
Share on whatsapp
Share on email
Share on print


92% Undensified Silica Fume is a micro-silica fume with 92% SiO2 content, and the Bulk density is 250-400kg/m³.

Silica Fume, also known as Micro-silica powder and cohesive silica fume, is formed when smelting ferrosilicon and silicon metal, the mineral-heated electric furnace emits extremely volatile Si gas and SiO2, and the gas is discharged and precipitated by oxidation condensation with air. Micro-silica powder is a by-product of the whole big industrial smelting and needs to be collected by environmental protection equipment. The initial density of micro-silica powder is only 150-200 kg/m3, which will cost a lot in transportation cost, and in order to reduce the transportation cost of micro-silica powder, the encrypted micro-silica powder becomes the ideal choice for most manufacturers.



SiO₂ (%)96
Moisture (%)0.46
Alkalis like Na₂O (%)0.47
Free CaO (%)0.09
Si (%)0.12
Free CI% (%)0.002
SO₃ (%)0.2
L.O.I (%)3.7
Specific surface (mg)22
Accelerated PozzolanicActivity ( 7 days )126


  • 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.

Request a Quote

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. 

Factory area(㎡)
0 M
Annual output value ($)