Microsilica , also called silica fume or micro silica, is a byproduct of producing 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, rather than being land filled. Silica fume consists primarily of amorphous (non-crystalline) silicon dioxide (SiO2), its average granule diameter is 0.15~0.20 µm,specific surface area is 15000~20000 m2/kg, and it has extremely strong surface active

Application in concrete:

Silica fume is widely used in concrete field especially high: Performance project, such as bridge, airport, hydropower station. Seawall, railway projects. The main functions as follow:

(1)Enhance the mechanical properties of concrete

The most important character for 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 chloridion, refractorily and anti-freezing of concrete

(3)Enhance constructability

Improve Shotcrete, Increase Early 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)Increase density, decrease freight cost

By densifying silica fume utilizing the Russil Tech Process allows the media to become more flowable and controllable. Using advanced Technology, densities can be increased from 100kg/m³ To 700 kg/m³ , and is still able to be dispersed back to its natural state.

Densified Microsilica

Sio2: 90% Min. 

Specific surface Area(B. E. T): 18, 000-23, 000sqm/kg

Pozz. Activity: 110%

Bulk Density: 550-700kgs/m3.

Packing: 1000kgs per jumbo bag with wooden pallet or as customers' requirement.

Qualify: SGS certificate with ASTM-C1240 Standard

Payment Terms: T/T or L/C

Delivery time: Within 15-30 days after the payment.