Introduction :

Silica fume, also called as micro silica, silica dust, which is a by-product of producing silicon metal or ferrosilicon alloys. Silica fume consists primarily of amorphous (non-crystalline) silicon dioxide (SiO2). The individual particles are extremely small, approximately 1/100th the size of an average cement particle. Because of its fine particles, large surface area, and the high SiO2 content, silica fume is a very reactive pozzolan when used in concrete. The quality of silica fume is specified by ASTM C 1240 and AASHTO M 307.

 

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.

  

Specification