We supply Silica Fume (Micro silica) an ultra-fine, amorphous silicon dioxide by-product from the production of silicon or ferrosilicon alloys. It is a high-performance pozzolanic material, widely used in concrete, refractories, and cementitious systems to improve strength, density, and durability.
-- Product Information
Product Name: Silica Fume / Micro silica
CAS No.: 69012-64-2
Main Content: SiO2 85-96%
Form: Grey or white fine powder
Particle Size: ~0.1 m (average)
Bulk Density: 200-700 kg/m³
Packing: 10kg/20kg/25kg bags, jumbo bags, or custom
HS Code: 281122
-- Key Features
Extremely fine particles with high surface area
Pozzolanic reactivity: forms additional C-S-H gel in cement
Enhances compressive & flexural strength
Reduces permeability, shrinkage, and bleeding
Improves abrasion, sulfate, and chemical resistance
Ideal for marine, dam, tunnel, and oil well cementing
-- Main Applications
High-performance concrete (HPC)
Precast and ultra-high strength concrete (UHPC)
Shotcrete for tunnels, bridges, and mining
Refractory castables and gunning mixes
Oil well grouting and marine structures
Anti-corrosion and waterproof concrete formulations
-- Why Choose Us?
High SiO2 content (85-96%) with consistent quality
Options in un-densifiedd, densified, or slurry form
Technical support for mix design and performance optimization
Full documents: COA, MSDS, SGS, TDS available
Export-ready packaging and timely shipment
Silica Fume is your solution for stronger, more durable, and longer-lasting concrete in the most demanding environments.
Contact us today for technical datasheet and free sample!
Micro Silica also known as Silica fume. It is a by product of producing silicon metal or ferrosilicon alloys in smelter using electric arc furnaces. It is a grey coloured powder, pozzolanic in nature.
Applications
Concrete Industry
Refractory
Rubber Industry
Anti caking agent
Pellet Binder
Microsilica (silica fume) is a by-product of silicon metal or ferrosilicon industries, is an amorphous silicon dioxide SiO2. This product reacts chemically with the calcium hydroxide in the cement paste which yields a calcium silicate hydrate gel that significantly enhances strength and durability. The super fine microsilica fills the voids between cement particles creating a very dense, less permeable concrete.
Physical characteristics:
Color: gray or gray white powder
Bulk density: 320-700 kg/m3
Chemical composition:
Items SiO2 Al2O3 Fe2O3 MgO CaO Na2O Moisture
Content
75-98%
1.0-0.2%
0.9-0.3%
0.7-0.1%
0.3-0.1%
1.3-0.2%
Fineness:
the fineness of the silica fume is less than 1 1/4m, and the average particle size is 0.1 0.3 1/4m, and the specific surface area is 20 - 28 m2/g. The fineness and specific surface area are about 80-100 times of cement and 50-70 times of fly ash.
Maxtech Micro Silica supplies will be as per QCS 2014 (ASTM C1240):
SiO2: >/= 92%
LOI: <6
Moisture Content: <1%
Activity Index at 7 days: > 105%
Application & Benefits of Microsilica (Silica fume):
In concrete:
The micro silica fume powder can be well filled in the cement particle space and make the slurry denser, mainly in the following:
Increase strength
Increase the density
Frost resistance
Early strength
Anti abrasion and anti-cavitation resistance
In Refractories:
Microsilica powder is widely used in the refractory industry. It has an important effect on the improvement of the amorphous refractory.
The production of amorphous and shaped refractory products as additives makes the strength and high temperature performance greatly improved.
Other Application:
Elastomers/Polymers
Microsilica, also known as silica fume, it is a very fine pozzolanic material, composed of amorphous silica produced byelectric arc furnaces as a byproduct of the production of elemental silicon or ferro silicon alloys.Microsilica can be used in a variety of cementitious products such as concrete,grouts,and mortars as well as elastomer, polymer,refractory, ceramic and rubber applications.
Silica fume is widely used in concrete field: High-performance project, such as bridge, airport, hydropowder station, seawall, railway projects.
1)Enhance the mechanical properties of 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 chlorideion and anti-freezing of concrete.
3)Enhance consructability.
Improve shotconrete, increase easly strength, control temperature contractors can take advantage of the properties of silica fume concrete to expedite projects or to achieve properties that migh otherwise be impossible to achieve.
1. Characteristic: It is a white and colloidal micro-particle with its primary micro-particle from 5-40 nm and has obvious properties such as thixotropy, reinforcing, thickening and filling etc. and is insoluble in all kinds of solvents and liquids except hy-drofluoric acid and concentrated bases.
2. Specification: Q/SHG19-2008ItemIndex
Product: LM200
Apparent: White solid colloidal micro-particle
Specific surface area m2/g: 150�±15
PH value3.6~4.3
Heating loss weight % (m/m) â?¤1.0
Burning loss weight % (m/m) â?¤1.0
Apparent density g/Lâ?¤60
3. Uses: It is used widely in silicone rubber, construction sealant, coating, electron and electric, aerospace, medicine and medical material, resin processing, printing ink, pesticide and other industries.
LM-150: used widely in silicone acid rubber, sulfurized silicone rubber in ambient temperature (low water content), silicone neutral rubber.
LM-200: used widely in sealing ring, sealing gasket, petroleum pipeline, insulator, tablet powdered preparation, artificial viscera, infusion tube, latex nipple and high quality oil ink.
LM-300: used widely in resin thickener, thickness agent for synthetic lubricating ester, resin thixotropic agent for electronic component.
LM-380: used widely in reinforcing agent for silicone rubber, medical silicone rubber for transparent artificial organs and artificial heart etc.
4. Packing: packed with multi-layer paper plastic compound bag with net weight of 5 kg or 10 kg, or packed by whole plastic seal for users having special demand on water content.
5. Store and transport: placed in vent and dry storehouse and prevented from humid, water, pressure and throwing during transport.
Micro silica also known as fume, is an amorphous (non-crystalline) polymorph of silicon dioxide, silica. It is an ultrafine powder collected as a by-product of the silicon and ferrosilicon alloy production and consists of spherical particles with an average particle diameter of 150 mm. The main field of application is as pozzolanic for high performance concrete because of its extreme fineness and high silica.
Applications :
Silica 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.
Advantages :
Addition of silica 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.
Fumed Silica is also popular as white carbon black and pyrogenic silica. Fumed Silica is non toxic, non-polluting, high-tech inorganic fine white chemical. In high purity fumed silica the silica content is above 99.8%. The particle size varies from 7 to 40 nm. This new ultra-fine inorganic material become a irreplaceable material due to its small particle size, large specific surface area, strong surface absorption, surface energy, heat resistance property.
Production Process:
Fumed silica is made from flame pyrolysis of silicon tetrachloride vaporized in 1800C electric arc.
Available Grade:
PME-SS-150, PME-SS-200, PME-SS-300, PME-SS-380.
Special request for customization can be prepared.
