High Quality Silica Fume

We are the leading Chinese Supplier and Exporter of Silica fume(Microsilica or Silica dust), what has been exported to Saudi Arabia, Qatar, India, Vietnam, Iran, UAE, Costa Rica, Nigeria, Georgia, and so on. Welcome the potential silica fume dealer and dealership in the foreign market for further cooperation.

Silica fume is a by-product from manufacturing silicon metal or ferrosilicon alloys. The smoke that results from furnace operation is collected and sold as silica fume, rather than being landfilled. Silica fume is widely used in concrete and refractory applicaton. One of the most beneficial uses for silica fume is in concrete. 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 chemical & physical properties, like high silica content & extreme fineness, silica fume is a very effective pozzolanic material. Concrete containing silica fume can have very high strength and can be very durable.

Our company is located in Fujian Province, which is the town of silicon metal. Our silica fume mostly comes from this province, this means High Pozzolan Activity. Standard specifications for silica fume used as concrete admixture are ASTM C1240, EN 13263. Prior to the mid-1970s, nearly all silica fume was discharged into the atmosphere. After environmental concerns necessitated the collection intead of landfilling of silica fume, it became economically viable to use silica fume in various applications, in particular high-performance concrete. Effect of silica fume on different properties of fresh and harden concrete.

Silica fume is added to Portland cement concrete to improve its properties, in particular its compressive strength, bond strength, and abrasion resistance. These improvements stem from both the mechanical improvements resulting from addition of a very fine powder to the cement paste mix as well as from the pozzolanic reactions between the silica fume and free calcium hydroxide in the paste. Addition of silica fume also reduces the permeability of concrete to chloride ions, which protects the reinforcing steel of concrete from corrosion, especially in chloride-rich environments such as coastal regions and those of humid continental roadways and runways (because of the use of deicing salts) and saltwater bridges.