• Name: Microsilica

  • Model: 85-95

  • Size: 325mesh

  • Shape: Mesh Powder

  • Usage: Cement Additives

Microsilica also called condensed silica fume. Microsilica is by-product of the ferrosilicon and silicon metal industry, and its production has a trend of increasing gradually. However, it is used in some limited areas such as the construction industry for the limitation of its process conditions used in only limited. Because it is the by-product of smelting, the whole process needs to recycle dust environmental protection equipment. Due to small density, it still needs to use encryption device to encrypt. Huatuo metallurgy as Microsilica suppliers in China, we have professional cleaning equipment to protect environment and response to the state environmental protection.

Microsilica (scientific name "silica fume," Micro silica or silicon ash), in the smelting of ferrosilicon and industrial silicon, silicon through the flue gas emitted by steam oxidation, the specially designed filter collected the amorphous powder like silica (SiO 2). Microsilica fume average 0.1-0.15 m in diameter, the size of several cement average 1.0%. Surface area for the 15-27 m 2 / g, with strong surface activity.

When Microsilica is used in concrete, it acts as a filler and as a cementitious material. The small microsilica particles fill spaces between cement particles and between the cement past matrix and aggregate particles. Microsilica also combines with calcium hydroxide to form additional calcium hydrate through the pozzolanic reaction. Both actions result in a denser, stronger and less permeable material.

The Specifications of Microsilica
Model SiO2 Al2O3 CaO+MgO Na2O  Cl NaOH PH LOI
SF-95 95% 1.0 1.0 1.0 0.0055 1.0 5-7 6%max
SF-92 92% 1.0 1.0 1.0 0.0055 1.0 5-7 6%max
SF-90 90% 1.0 1.0 1.0 0.0055 1.0 5-7 6%max
SF-85 85% 1.0 1.0 1.0 0.0055 1.0 5-7 6%max