92% Densified Microsilica (Silica Fume) 92D

92% Densified Silica Fume (92D) is a type of silica fume that has been processed to increase its bulk density. This makes it easier to handle and transport, and can also improve its performance in concrete.

92% Densified Silica Fume is a type of microsilica that is produced as a byproduct of the production of silicon metal and ferrosilicon alloys. It is a highly reactive pozzolanic material with a high silica content of over 92% and a bulk density of around 550-700 kg/m3. The specific surface area of 92% Densified Silica Fume is very high, ranging from 20,000 to 30,000 m2/kg, making it an ideal additive for concrete and cement-based products.

92% Densified Silica Fume 92D
  • SiO2: >92%
  • Color: Grey
  • PH: 6~8
  • Bulk Density: 250~350kg/m3, 550~700kg/m3, Above 700kg/m3

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  • Increased strength
  • Improved durability
  • Reduced permeability
  • Increased bond strength


  • High-strength concrete: 92D is often used in high-strength concrete applications, where its pozzolanic properties can help to achieve very high compressive strengths.
  • Durable concrete: 92D is also used in concrete applications where durability is important, such as in marine environments or in areas with severe freeze-thaw cycles.
  • Concrete with reduced permeability: 92D can be used to reduce the permeability of concrete, which can improve its resistance to water and other fluids.
  • Concrete with improved bond strength: 92D can be used to improve the bond strength of concrete to steel reinforcement, which helps to improve the overall performance of the concrete structure.


Silicon Dioxide (SiO2) amorphous>92%
Carbon (C)<5%
Aluminum Oxide (Al2O3)  <0. 8%
Magnesium Oxide (MgO)  <3%  
Calcium Oxide (CaO)<0.8%
Iron Oxide(Fe2O3)<1%
Sodium Oxide (Na2O)  <1%   
Potassium Oxide (K2O)     <1. 2%  
Silicon Dioxide (SiO2) Crystalline<0.5%


  • 10kg soluble paper bags x 84 on the pallets.
  • 20kg soluble paper bags x 42 on the pallets.
  • 950kg plastic woven bags x 2 on the pallets(with or without bottom spout)
  • 1000kg plastic woven bags x 2 on the pallets(with or without bottom spout )
  • 500kg plastic woven bags x 2 on the pallets (with or without bottom spout )
  • United States – ASTM C1240
  • Canada – CSA A23.5
  • European Union – EN 13263
  • China – GB/T 18736
  • Japan – JIS A 6207
  • Brazil – ABNT NBR 13956
  • Korea – KS F 2567
  • Vietnam – TCVN 9395
  • India – IS 15388

The cost of the silica fume is influenced by multiple factors, such as SiO2 content, logistics transportation cost, labor cost, ect. Generally, the price of silica fume ranges from $150 to $800 per metric ton. However, prices can sometimes exceed this range for high-quality, specialized products or for small orders.Due to different needs, which means that the price is changed, so we are unable to provide online quotes. We will send you the detailed quotation after you send us your requirements.

Silica fume and fly ash are both supplementary cementitious materials that can improve the performance of concrete. Silica fume is composed of extremely fine particles of amorphous silica, while fly ash is a byproduct of coal combustion and composed of small spherical particles of inorganic material. Silica fume particles are much smaller than fly ash particles, and it is generally considered to be a more reactive pozzolan than fly ash. Silica fume is known for improving the compressive strength of concrete at early ages, while fly ash is typically used to improve the long-term strength and durability of concrete. The choice of which material to use will depend on the specific application and performance requirements of the concrete being used.

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Founded in 2001, HSA is a leading provider of Silica Fume and Abrasives in China, and also the premium source of high-performance Products for concrete and abrasives industries.

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