Silica Fume

Product Details:

Silica Fume (Grey) – Microsilica (Ferro-Silicon Base) is an ultra-fine, amorphous form of silicon dioxide (SiO₂), recovered from the flue gases during the production of ferrosilicon alloys. It has high pozzolanic activity, a particle size ~100 times smaller than cement, and a surface area of 15–30 m²/g.

Uses and Applications of Grey Silica Fume (Microsilica – Ferro Silicon Base)�� 1. Construction Industry (Concrete and Cement)

• High-Performance Concrete (HPC):

  • Increases compressive, flexural, and bond strength.

  • Improves abrasion, chemical, and chloride resistance.

• Durable Marine & Infrastructure Projects:

  • Used in bridges, tunnels, dams, highways, marine structures, and parking decks.

• Shotcrete:

  • Enhances cohesion, reduces rebound loss, and improves early strength in tunnel linings and slope stabilization.

�� 2. Refractory Industry

• Castables & Ramming Masses:

  • Acts as an ultrafine filler and binder.

  • Enhances strength, reduces porosity, and improves thermal shock resistance.

• Used in High-Temperature Applications:

  • Lining furnaces, ladles, and tundishes in steel and non-ferrous metal industries.

�� 3. Oil and Gas Industry

• Oil Well Cementing:

  • Improves strength and durability of cement slurries in deep wells.

  • Enhances resistance to sulfates and high temperatures.

�� 4. Industrial Flooring and Precast Products

• Flooring and Pavements:

  • Increases wear resistance, load-bearing capacity, and lifespan.

• Precast Elements:

  • Improves finish quality and early strength of blocks, pipes, tiles, and panels.

�� 5. Fiber Cement Products

• Used in asbestos-free boards and roofing sheets.

• Enhances strength, durability, and dimensional stability.

�� 6. Ceramic and Tile Industry

• Acts as a binder and strength improver in ceramic compositions and tile adhesives.

�� 7. Glass Industry

• Supplementary silica source in glass-ceramics or specialty glass (limited application due to grey color and impurities).

�� 8. Rubber and Plastics

• As a functional filler, it improves mechanical strength, reduces permeability, and enhances wear resistance in rubber and plastic compounds.

�� 9. Paints and Coatings

• Acts as a matting agent, anti-settling agent, or strength enhancer in industrial coatings and protective paints.

�� 10. Environmental and Waste Management

• Solidification/Stabilization Agent:

  • Binds heavy metals and toxic residues in hazardous waste treatment.

• Landfill Liners:

  • Used in the formulation of low-permeability barriers.

Key Benefits of Grey Silica Fume

• SiO₂ content: ≥ 85–95%

• Highly reactive pozzolanic material

• Reduces permeability and enhances durability

• Improves mechanical and thermal properties

 

 

 

Additional Information:

• Item Code: AC106
• Production Capacity: 50000
• Delivery Time: Within 7 to 10 days
• Packaging Details: Brand New 25 Kgs Hdpe Bags

Product Details:

Silica Fume ( Microsilica ) ( Grey )

We are the leading manufactures, exporters,technical developers and suppliers of Silica Fume ( Microsilica ) ( Grey ) in Chennai, Tamilnadu, India. 

Undensified Silica Fume ( Microsilica ) ( Grey ) for Refractory Cast Fused Cast and Sintered Refractories for Glass furnaces 

The Applications Of Silica Fume ( Microsilica ) ( Grey ) In Refractory Materials

Silica fume is mainly used to improve refractory materials for over forty years. Silica fume using in refractory materials has many features as following:

• Silica fume can increase the liquidity of pouring type of refractory materials, reduce water consumption and make it easy to shape and improve production efficiency greatly.
• Because of its ultra-structure of filler, the density of refractory material and strength will increase significantly;
• Silica fume has high activity, under the premise of existence of Al2O3 ingredients, it is easy to generate the mullite phase to make the high temperature strength and thermal shock resistance increase greatly.
• Silica fume has strong hydrophilic. Adding water, it can make stronger cohesion in refractory material in order to improve the performance of high temperature resistance of refractory and prolong the service life of refractory products.

Refractory material usually uses unencrypted micro silicon powder. At present, besides in casting refractory material widely using, unencrypted micro silicon is applied extensively in the fused and sintered refractories. Such as low cement castable, developed in the seventy’s, is a new type of high performance refractory castable, which is successfully developed by France first. Therefore, silica fume is widely applied in various industrial high temperature furnace with good technical and economic effect.

Low cement castable and ordinary castable both use calcium aluminate cement. But adding silica fume and high efficiency water reducing agent, it can not only save expensive aluminate cement 50-70% but also improve the cement performance. Silica fume has double applications in the new castable. Because of the size of silica fume is very small, and an important feature of silica fume can reduce the cement content in the refractory casting material.

 

Silica fume is widely used in refractory industry. Refractory raw material can be instead of pure aluminium oxide mud as refractor material; Used as an additive to join in the production of amorphous and shaped refractory products, silica fume can improve strength and increase the high temperature performance. In addition, it is applied in the ladle as a whole as condensation agent. According to the data indicate, the low cement castable with silica fume has been widely applied in coke oven, the sintering, steel-making, steel rolling, nonferrous metallurgy, petroleum as well as chemical, cement, glass ceramics and power generation industry 

Additional Information:

• Production Capacity: 100000
• Delivery Time: Immediate
• Packaging Details: 25 Kgs PP Bags

Product Details:

We are leading manufacturers and exporters of the best quality Microsilica ( Silica Fume Densified ). 

Silica Fume (Microsilica) White is a highly reactive, ultra-fine pozzolanic material primarily composed of amorphous silicon dioxide (SiO₂). The production and is characterized by its white color, making it ideal for applications where aesthetics matter, such as in architectural or decorative concrete. The material enhances concrete strength, durability, and impermeability by filling the spaces between cement particles, creating a dense and cohesive mix. It is also used in high-performance concrete, refractory applications, and as a filler in polymers and coatings.

Applications of Silica Fume (Microsilica) White:

1. High-Performance Concrete (HPC): Improves compressive strength, durability, and resistance to chemical attack in concrete used for bridges, highways, and skyscrapers.
2. Decorative and Architectural Concrete: Enhances the aesthetic appearance while increasing strength, used in white or light-colored concrete surfaces like facades, floors, and countertops.
3. Precast Concrete Elements: Used in producing precast items like beams, panels, and girders due to its ability to improve strength and reduce permeability.
4. Shotcrete: Applied in tunneling, mining, and slope stabilization, offering improved adhesion, less rebound, and higher strength.
5. Refractory Materials: Used in castable refractories to enhance high-temperature resistance and reduce porosity in applications such as furnaces and kilns.
6. Grouts and Mortars: Improves the bond strength and reduces shrinkage in grouts used for filling cracks and gaps in construction.
7. Oil Well Cementing: Enhances the strength and reduces permeability of oil well cement, especially in high-pressure, high-temperature environments.
8. Polymer and Coating Filler: Used as a filler in polymers and coatings to improve durability and mechanical properties without affecting color or appearance.
9. Marine Structures: Increases resistance to chloride penetration, ideal for use in marine environments to prevent corrosion of reinforcing steel.
10. Industrial Floors: Increases wear resistance and durability for floors subject to heavy traffic and abrasion in industrial settings.

 

 

 

Additional Information:

• Item Code: AC108
• Production Capacity: 100000
• Delivery Time: Immediate
• Packaging Details: 50 Kgs Brand New PP Bags

Product Details:

Silica Fume (Microsilica – White): Brief Uses and Applications

Silica fume, also known as microsilica, is an ultra-fine, high-purity form of amorphous silicon dioxide (SiO₂). When white silica fume is specified, it typically refers to high-purity, low-impurity microsilica often derived from the production of high-grade silicon or ferrosilicon alloys. It is commonly used for its pozzolanic and filling properties.

�� Key Properties:

• Extremely fine (100x smaller than cement particles)

• High surface area (~15,000–30,000 m²/kg)

• Pozzolanic reactivity (reacts with calcium hydroxide)

• High silicon dioxide content (typically >90%)

1. Construction Industry

• High-Performance Concrete (HPC):

  • Enhances compressive strength, durability, and abrasion resistance.

  • Used in bridges, marine structures, tunnels, and industrial floors.

• Shotcrete Applications:

  • Improves adhesion, reduces rebound, and enhances early strength in tunnel linings and slope stabilization.

• Benefit: Increases lifespan and structural integrity, especially in aggressive environments.

2. Refractory Industry

• Used in castables and monolithic refractories as a binder and filler.

• Improves density, thermal stability, and mechanical strength of refractory linings.

• Benefit: Withstands high temperatures and aggressive chemical conditions.

3. Oil and Gas Industry

• Oil well cementing:

  • Enhances cement strength and reduces permeability under high-pressure, high-temperature conditions.

• Benefit: Ensures better sealing and long-term stability of wellbores.

4. Polymer and Resin-Based Products

• Acts as a filler in epoxy resins, rubber, and paints to improve strength, UV resistance, and abrasion resistance.

• Benefit: Enhances mechanical and chemical performance of finished products.

5. Ceramics and Electronics

• Used in advanced ceramics, insulators, and electronic components for its high purity and thermal properties.

• Benefit: Contributes to high-performance, heat-resistant components.

6. Environmental Applications

• Sometimes used in waste stabilization and soil solidification processes.

• Enhances the binding and immobilization of hazardous substances.

• Benefit: Helps meet environmental safety and compliance requirements.

 

Additional Information:

• Item Code: AC273
• Production Capacity: 100 TONS
• Delivery Time: IMMEDIATE
• Packaging Details: BRAND NEW PP BAGS

Product Details:

Here’s a WhatsApp / Email-friendly marketing version for Astrra Chemicals – Extra Super Snow White Micronised Silica (Grade – 325) 👇

🌟 ASTRRA CHEMICALS
📦 Extra Super Snow White Micronised Silica – Grade 325

💠 Premium Functional Filler | High Purity Silica (SiO₂ > 99%)
Finely micronised, brilliant snow-white silica powder with excellent brightness, chemical inertness & controlled particle size (325 Mesh).

🔹 Key Highlights

✅ Ultra-white brightness (>98%)
✅ High purity & consistency
✅ Improves surface finish & strength
✅ Excellent dispersibility & stability
✅ Chemically inert & non-toxic

🏭 Applications Across Industries

🎨 Paints & Coatings: Improves opacity, smoothness & durability; cost-effective TiO₂ extender.
🧱 Construction Chemicals: Enhances strength, workability & surface finish in wall putty, grouts & adhesives.
🔹 Plastics & Rubber: Reinforces compounds; improves tensile strength & heat resistance.
🔥 Ceramics & Glass: Adds whiteness, hardness & thermal stability.
🧴 Adhesives & Sealants: Boosts viscosity, thixotropy & mechanical strength.
💅 Cosmetics & Personal Care: Acts as whitening filler & mattifying agent.

⚙️ Typical Properties

• Whiteness: 98%+

• Purity (SiO₂): >99%

• Particle Size: 325 Mesh

• Moisture: <0.5%

 

Additional Information:

• Production Capacity: 100000
• Delivery Time: IMMEDIATE
• Packaging Details: BRAND NEW PP BAGS

Product Details:

White Microsilica ( Silica Fume ) – the Ultimate Pozzolan We supply Micro Silica (also known as silica fume) products to the following industries :- White Microsilica fume (powdery) is a very rare micro silicon powder. It is very strict on the raw material and production process and it can be used in superfine fillers with high whiteness requirements, such as grout, sealant, repair agent and so on. White Microsilica ( Silica Fume ) improves the properties of both fresh and hardened concrete. The most important property is the permeability, Lower the ingress of movement of water or chemicals; lower the adverse reactions such as sulfate attack, The reaction between silica fume and the calcium hydroxide, released as the cement hydrates, provides a dense impermeable pore structure. The temperature of the white microsilica fume is 1800 degrees, higher than the ordinary microsilica fume, so in the refractory industry, white micro silicon powder is more popular. Improve the mechanical performances of concrete. The Silica fume reacts with the cement paste to form additional strong Calcium Silicate Hydrate (CSH) providing higher strength. Silica fume reduces bleeding and enhances the cement paste bond to the aggregates. Thanks to its pozzolanic effect (reaction with Ca(OH)2 ), and therefore to the strength improvement. Cement / Concrete Construction Refractory industries Tiles Paints Decorative Concrete Products

Additional Information:

• Production Capacity: 100000
• Delivery Time: Immediate
• Packaging Details: 50 Kgs Brand New PP Bags

Product Details:

We are leading manufacturers and exporters of the best quality Silica Fume ( Microsilica - White ).

Silica Fume (Microsilica) White is a highly reactive, ultra-fine pozzolanic material primarily composed of amorphous silicon dioxide (SiO₂). The production and is characterized by its white color, making it ideal for applications where aesthetics matter, such as in architectural or decorative concrete. The material enhances concrete strength, durability, and impermeability by filling the spaces between cement particles, creating a dense and cohesive mix. It is also used in high-performance concrete, refractory applications, and as a filler in polymers and coatings.

Applications of Silica Fume (Microsilica) White:

1. High-Performance Concrete (HPC): Improves compressive strength, durability, and resistance to chemical attack in concrete used for bridges, highways, and skyscrapers.
2. Decorative and Architectural Concrete: Enhances the aesthetic appearance while increasing strength, used in white or light-colored concrete surfaces like facades, floors, and countertops.
3. Precast Concrete Elements: Used in producing precast items like beams, panels, and girders due to its ability to improve strength and reduce permeability.
4. Shotcrete: Applied in tunneling, mining, and slope stabilization, offering improved adhesion, less rebound, and higher strength.
5. Refractory Materials: Used in castable refractories to enhance high-temperature resistance and reduce porosity in applications such as furnaces and kilns.
6. Grouts and Mortars: Improves the bond strength and reduces shrinkage in grouts used for filling cracks and gaps in construction.
7. Oil Well Cementing: Enhances the strength and reduces permeability of oil well cement, especially in high-pressure, high-temperature environments.
8. Polymer and Coating Filler: Used as a filler in polymers and coatings to improve durability and mechanical properties without affecting color or appearance.
9. Marine Structures: Increases resistance to chloride penetration, ideal for use in marine environments to prevent corrosion of reinforcing steel.
10. Industrial Floors: Increases wear resistance and durability for floors subject to heavy traffic and abrasion in industrial settings.

 

Additional Information:

• Production Capacity: 100000
• Delivery Time: Immediate
• Packaging Details: 50 Kgs Brand New PP Bags

Product Details:

Here’s a WhatsApp / Email-friendly marketing version for Astrra Chemicals – Extra Super Snow White Micronised Silica (Grade – 325) 👇

🌟 ASTRRA CHEMICALS
📦 Extra Super Snow White Micronised Silica – Grade 325

💠 Premium Functional Filler | High Purity Silica (SiO₂ > 99%)
Finely micronised, brilliant snow-white silica powder with excellent brightness, chemical inertness & controlled particle size (325 Mesh).

🔹 Key Highlights

✅ Ultra-white brightness (>98%)
✅ High purity & consistency
✅ Improves surface finish & strength
✅ Excellent dispersibility & stability
✅ Chemically inert & non-toxic

🏭 Applications Across Industries

🎨 Paints & Coatings: Improves opacity, smoothness & durability; cost-effective TiO₂ extender.
🧱 Construction Chemicals: Enhances strength, workability & surface finish in wall putty, grouts & adhesives.
🔹 Plastics & Rubber: Reinforces compounds; improves tensile strength & heat resistance.
🔥 Ceramics & Glass: Adds whiteness, hardness & thermal stability.
🧴 Adhesives & Sealants: Boosts viscosity, thixotropy & mechanical strength.
💅 Cosmetics & Personal Care: Acts as whitening filler & mattifying agent.

⚙️ Typical Properties

• Whiteness: 98%+

• Purity (SiO₂): >99%

• Particle Size: 325 Mesh

• Moisture: <0.5%

 

Additional Information:

• Production Capacity: 100000
• Delivery Time: Immediate
• Packaging Details: Brand New PP Bags

Product Details:

Here’s a comprehensive overview of Silica Fume / Microsilica (Grey)—its uses, applications, and where it's commonly employed across industries:

Silica Fume / Microsilica (Grey)

• Scientific Name: Amorphous Silicon Dioxide (SiO₂)

• Form: Ultrafine, grey powder

• Source: Byproduct of silicon and ferrosilicon alloy production

• Particle Size: ~0.1 μm (100x smaller than cement)

✅ Uses & Applications of Silica Fume (Grey) 1. Concrete and Construction Industry

Primary Use: Pozzolanic admixture in high-performance concrete (HPC)

• Enhances:

  • Compressive strength

  • Durability

  • Abrasion resistance

  • Corrosion resistance (especially in marine & chloride-laden environments)

• Applications:

  • Bridges & marine structures

  • High-rise buildings

  • Tunnels & dams

  • Industrial flooring

  • Shotcrete (sprayed concrete) in tunnels and mines

2. Oil & Gas Industry

• Used in oil well cementing:

  • Reduces permeability

  • Increases strength under high-pressure, high-temperature (HPHT) conditions

• Improves bonding between casing and borehole wall

3. Refractory Industry

• Used as an ingredient in refractory castables (monolithic refractories)

• Benefits:

  • Reduces porosity

  • Increases thermal shock resistance

  • Improves mechanical strength

• Applications:

  • Ladles, tundishes, kilns, furnaces

4. Rubber and Plastics

• Used as a functional filler

• Improves tensile strength, tear resistance, and aging properties of elastomers and plastics

5. Ceramics and Composites

• Acts as a reinforcing agent

• Enhances structural integrity and densification during sintering

6. Grouts and Mortars

• Improves workability, adhesion, and crack resistance

• Used in precision grouts, waterproofing slurries, and repair mortars

7. Steel Industry

• In castable linings and gunning mixes for furnaces and ladles

• Enhances thermal and chemical stability of linings

Additional Notes:

• Grey color: Usually indicates raw or densified silica fume (undensified is more white)

• Dosage in concrete: 5% to 15% of cement weight

• Compliance standards:

  • ASTM C1240 (US)

  • EN 13263 (Europe)

  • IS 15388 (India)

Product Details:

Silica Fume 920 U is a high-performance microsilica or condensed silica fume — a by-product of silicon or ferrosilicon alloy production — This material has very fine spherical particles (~0.1 μm) and a specific surface area of 15–30 m²/g, enabling it to act both as a pozzolan and a micro-filler in cementitious systems.

🔹 Key Properties of Silica Fume 920 U

• SiO₂ Content: ≥92%

• Form: Densified (improves handling and dispersion)

• Particle Size: ~100× smaller than cement

• Pozzolanic Activity Index: Very high

• Color: Gray to off-white

🔹 I. Uses & Applications in Cement and Concrete1. High-Performance Concrete (HPC)

• Used in structural elements requiring high strength and durability.

• Benefits:

  • Increased compressive strength (up to 100 MPa or more)

  • Improved abrasion and impact resistance

  • Excellent pumpability and workability with superplasticizers

2. High Strength Concrete (HSC)

• Application Areas:

  • High-rise buildings

  • Bridge decks

  • Prestressed elements

• Silica Fume Role:

  • Reacts with free Ca(OH)₂ to form additional C–S–H gel

  • Densifies the cement matrix

3. Marine & Coastal Structures

• Key Use: Resistance to chloride and sulfate attack

• Structures: Piers, jetties, offshore platforms

• Benefits:

  • Reduces permeability

  • Inhibits corrosion of reinforcement steel

4. Shotcrete (Dry & Wet Mix)

• Widely used in:

  • Tunnel linings

  • Mining support systems

  • Slope stabilization

• Improves:

  • Bond strength

  • Early strength gain

  • Resistance to wash-out in wet conditions

5. Industrial Floors & Pavements

• High abrasion resistance needed for:

  • Warehouses

  • Heavy machinery workshops

  • Airport runways

6. Precast Concrete Products

• Used in:

  • Precast tunnel segments

  • Railway sleepers

  • Architectural elements

• Benefits:

  • Faster demolding time

  • Smooth surface finish

  • Lower permeability

7. Chemical & Waste Containment Structures

• In hazardous environments (acidic or saline), silica fume enhances chemical durability.

🔹 II. Other Applications Beyond Concrete1. Refractory Castables

• Used in low-cement castables (LCC) and ultra-low cement castables (ULCC).

• Benefits:

  • Improves packing density

  • Reduces porosity

  • Enhances mechanical strength and thermal shock resistance

2. Ceramics

• Acts as a binder and densifying agent in high-temperature ceramic parts.

3. Silicon Carbide Production

• Used as a silica source in reduction processes to produce SiC.

4. Polymer-Concrete Composites

• Enhances interfacial bonding between polymer and aggregate.

• Used in precast polymer concrete utility structures, manholes, etc

Additional Information:

• Production Capacity: 100000
• Delivery Time: Immediate
• Packaging Details: 25 Kgs Brand New PP Bags