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Silica Fume ( Grey) ( Microsilica) ( Ferro Silicon Base )
Product Brochure
| Packaging Size | 50 kg |
| Purity | 99% |
| Usage/Application | Construction Industry |
| Color | Grey |
| Country of Origin | Made in India |
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)
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Scientific Name: Amorphous Silicon Dioxide (SiO₂)
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Form: Ultrafine, grey powder
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Source: Byproduct of silicon and ferrosilicon alloy production
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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)
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Enhances:
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Compressive strength
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Durability
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Abrasion resistance
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Corrosion resistance (especially in marine & chloride-laden environments)
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Applications:
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Bridges & marine structures
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High-rise buildings
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Tunnels & dams
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Industrial flooring
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Shotcrete (sprayed concrete) in tunnels and mines
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2. Oil & Gas Industry
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Used in oil well cementing:
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Reduces permeability
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Increases strength under high-pressure, high-temperature (HPHT) conditions
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Improves bonding between casing and borehole wall
3. Refractory Industry
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Used as an ingredient in refractory castables (monolithic refractories)
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Benefits:
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Reduces porosity
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Increases thermal shock resistance
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Improves mechanical strength
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Applications:
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Ladles, tundishes, kilns, furnaces
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4. Rubber and Plastics
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Used as a functional filler
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Improves tensile strength, tear resistance, and aging properties of elastomers and plastics
5. Ceramics and Composites
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Acts as a reinforcing agent
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Enhances structural integrity and densification during sintering
6. Grouts and Mortars
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Improves workability, adhesion, and crack resistance
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Used in precision grouts, waterproofing slurries, and repair mortars
7. Steel Industry
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In castable linings and gunning mixes for furnaces and ladles
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Enhances thermal and chemical stability of linings
Additional Notes:
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Grey color: Usually indicates raw or densified silica fume (undensified is more white)
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Dosage in concrete: 5% to 15% of cement weight
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Compliance standards:
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ASTM C1240 (US)
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EN 13263 (Europe)
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IS 15388 (India)
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Expanded Perlite Powder
Minimum Order Quantity: 50 Kg
Product Brochure
| Packaging Type | Packet |
| Form | Powder |
| Purity | 99% |
| Brand | Astrra Chemicals |
| Grade | SF II POWDER |
| Country of Origin | Made in India |
| Packaging Size | 10 Kgs Bags |
| Silica | 75 to 80% |
Expanded Perlite Powder is a lightweight, porous, and highly absorbent material widely used in various industries due to its insulation properties, chemical inertness, and ability to retain moisture. Here are some of its key applications:
1. Construction & Building Materials-
Lightweight Concrete & Plaster: Used as an aggregate in lightweight concrete and plaster to improve insulation and reduce structural weight.
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Insulation: Used in walls, roofs, and floors for thermal and acoustic insulation.
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Fireproofing: Helps in making fire-resistant coatings and structural protection.
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Masonry Fill: Used to fill hollow bricks and blocks for enhanced insulation and strength.
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Soil Conditioning: Improves aeration and water retention in soil, making it ideal for plant growth.
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Hydroponics: Acts as a soilless growing medium.
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Seed Starting & Root Cuttings: Provides an optimal environment for germination and root development.
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Animal Feed Additive: Used as an anti-caking agent in animal feed.
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Cryogenic Insulation: Used to insulate tanks storing liquid gases like LNG and oxygen due to its low thermal conductivity.
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Filtration: Used for filtering liquids such as beer, wine, water, and chemicals.
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Refractory Materials: Enhances the insulation properties of refractory bricks and coatings.
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Abrasives & Polishing: Used in polishing compounds due to its fine particle size.
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Filler in Paints & Coatings: Enhances thermal insulation and fire resistance.
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Plastic & Rubber Additive: Reduces weight and improves thermal properties.
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Oil Spill Absorbent: Used for absorbing oil spills and hazardous liquids.
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Wastewater Treatment: Acts as a filtration medium to remove impurities.
Additional Information:
- Production Capacity: 100000
- Delivery Time: Immediate
- Packaging Details: Brand New PP Bags
Expended Perlite Powder In Chennai
Minimum Order Quantity: 10 Kilogram
Product Brochure
| Packaging Type | HDPE Bag |
| State | Powdered |
| Color | White |
| Grade | SF II |
| Purity | 99% |
| Brand | Astrra Chemicals |
| PH Value | 7-10 |
| Country of Origin | Made in India |
| Packaging Size | 10 kg/bag |
| chemical composition | 75 to 80% |
Expanded perlite is a lightweight, porous material widely used in construction due to its excellent insulation, fire resistance, and durability. Here are some key uses and applications in construction:
- Used as an aggregate to produce lightweight concrete and plaster.
- Reduces structural load while maintaining strength.
- Improves thermal and sound insulation.
- Acts as an excellent thermal insulator in walls, roofs, and floors.
- Enhances energy efficiency in buildings.
- Used in acoustic panels to reduce noise transmission.
- Incorporated into fireproof coatings and sprays.
- Used in refractory bricks and insulation panels for fire resistance.
- Mixed with bitumen or cement for lightweight insulating roof screeds.
- Used as a filler in floor leveling compounds to reduce weight and improve insulation.
- Poured into hollow block walls to enhance insulation and fire resistance.
- Used to fill cavities and voids in construction projects.
- Enhances workability, reduces shrinkage, and improves thermal resistance in plasters and stucco.
- Provides thermal insulation for chimneys, ducts, and pipelines.
- Used in green roofs to reduce weight while improving drainage and aeration.
Its versatility, sustainability, and cost-effectiveness make expanded perlite a valuable material in modern construction.
Additional Information:
- Item Code: AC175
- Production Capacity: 10000 Kgs Per Day
- Delivery Time: Immediate
- Packaging Details: Brand New PP Bags
Expanded Perlite Powder for Construction
Minimum Order Quantity: 100 Kg
Product Brochure
| Packaging Size | 25KG |
| Packaging Type | Poly Bag |
| State | Powdered |
| Brand | Astrra Chemicals |
| Usage/Application | Industrial |
| Form | Powder |
| Color | White |
| PH Value | 2-6 |
Expanded perlite powder is produced by heating natural perlite ore, causing it to expand up to 20 times its original volume. Its unique properties, such as lightweight structure, high porosity, insulation, and chemical inertness, make it suitable for various applications across multiple industries.
**1. Construction Industry-
Thermal Insulation:
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Used in lightweight insulating concrete, roof decks, and chimney linings to reduce heat loss.
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Provides thermal insulation for cryogenic storage tanks and cold boxes.
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Soundproofing:
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Helps in acoustic insulation for walls, ceilings, and floors in buildings.
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Lightweight Concrete:
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Mixed with cement to create lightweight, strong, and fire-resistant concrete.
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Plaster & Mortar:
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Enhances workability and reduces cracking in plaster and mortar mixtures.
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Soil Amendment:
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Improves soil aeration, drainage, and water retention for better plant growth.
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Ideal for greenhouse plants, gardens, and potting mixes.
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Hydroponics:
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Provides support for roots and retains moisture without waterlogging.
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Seed Germination:
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Offers a sterile medium for seed germination and rooting cuttings.
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Filtration Aid:
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Used in filtering chemicals, oils, beverages, and pharmaceuticals to remove impurities.
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Cryogenic Insulation:
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Provides insulation for storage tanks, pipelines, and containers storing liquefied gases like oxygen and nitrogen.
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Fireproofing:
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Added to fire-resistant coatings and boards to enhance fireproofing properties.
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Refractory Products:
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Used in refractory bricks and insulation panels for furnaces and kilns.
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Water & Oil Absorption:
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Absorbs oil spills on land and water due to its porous structure.
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Wastewater Treatment:
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Removes heavy metals and other contaminants from wastewater.
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Soil Remediation:
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Helps treat contaminated soils by absorbing pollutants.
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Exfoliating Agent:
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Used in soaps, scrubs, and face washes as a gentle exfoliant to remove dead skin cells.
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Moisture Retention:
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Helps retain moisture in cosmetic formulations like creams and lotions.
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Food Insulation:
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Used in cold storage facilities and containers for temperature-sensitive food products.
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Filtration:
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Assists in filtering oils, beverages, and other liquid food products for purity.
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Additional Information:
- Production Capacity: 100000
- Delivery Time: IMMEDIATE
- Packaging Details: BRAND NEW DOUBLE LININED PP BAGS
Fumed Silica Aerosil 200 EROSIL NV/200
Minimum Order Quantity: 10 Kg
Product Brochure
| Purity % | 99% |
| Packaging Details | 10 Kgs PP Bags |
| Grade Standard | Industrial Grade |
| State | Powdered |
| Grade | NV/200 |
| Color | White |
| Usage/Application | Industrial |
| Packaging Type | HDPE Bag |
| PH Value | 5-13 |
| Physical State | Powder |
| Brand | Astrra Chemicals |
| Country of Origin | Made in India |
Aerosil Fumed Silica (Erosil NV200) – Uses & Applications in FRP, Composite & Resin Applications
Aerosil Fumed Silica (Erosil NV200) is an ultra-fine, high-purity amorphous silica used as a thickening, thixotropic, and reinforcing agent in various resin-based applications, including FRP (Fiber-Reinforced Plastic), composites, and resins.
Key Uses & Benefits:-
Thixotropic Agent (Anti-Sagging Property)
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Prevents sagging and running in vertical or overhead applications of resins, gel coats, and coatings.
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Improves the workability of resins during application.
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Rheology Control & Viscosity Modification
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Enhances the flow behavior of unsaturated polyester, epoxy, and vinyl ester resins.
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Helps control settling in resin systems.
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Reinforcement & Strength Enhancement
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Provides mechanical reinforcement to FRP laminates by improving tensile strength and impact resistance.
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Reduces cracking and shrinkage in cured composites.
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Prevention of Resin Run-Off in Molds
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Increases viscosity and prevents resin draining in hand lay-up or infusion molding.
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Helps achieve uniform resin distribution in molds.
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Improved Abrasion & Chemical Resistance
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Enhances the durability of composite structures in aggressive chemical environments.
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Surface Finish Enhancement
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Reduces pinhole formation in coatings and gel coats.
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Provides a smooth and uniform finish in FRP applications.
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Hand Lay-Up & Spray-Up Processes – Controls viscosity and prevents resin sagging.
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Pultrusion & Filament Winding – Ensures uniform resin distribution and reinforcement.
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Casting & Molding Compounds – Improves flowability and mechanical properties.
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Adhesives & Sealants – Enhances thixotropy and bonding strength.
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Coatings & Gelcoats – Prevents running and improves surface finish.
Additional Information:
- Production Capacity: 10000 tons
- Delivery Time: Immediate
- Packaging Details: Brand New PP bAG
Microsilica Micro White Silica Fume ( Grade - 325 )
Minimum Order Quantity: 100 Kg
Product Brochure
| Packaging Size | 50 kg |
| Purity | 99% |
| Usage/Application | Construction Industry |
| Color | White |
| Country of Origin | Made in India |
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).
✅ Ultra-white brightness (>98%)
✅ High purity & consistency
✅ Improves surface finish & strength
✅ Excellent dispersibility & stability
✅ Chemically inert & non-toxic
🎨 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.
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Whiteness: 98%+
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Purity (SiO₂): >99%
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Particle Size: 325 Mesh
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Moisture: <0.5%
Additional Information:
- Production Capacity: 100000
- Delivery Time: IMMEDIATE
- Packaging Details: BRAND NEW PP BAGS
Silica Fume Microsilica White Grade 325
Minimum Order Quantity: 100 Kg
Product Brochure
| Packaging Size | 50 kg |
| Purity | 99% |
| Usage/Application | Construction Industry |
| Color | White |
| Country of Origin | Made in India |
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).
✅ Ultra-white brightness (>98%)
✅ High purity & consistency
✅ Improves surface finish & strength
✅ Excellent dispersibility & stability
✅ Chemically inert & non-toxic
🎨 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.
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Whiteness: 98%+
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Purity (SiO₂): >99%
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Particle Size: 325 Mesh
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Moisture: <0.5%
Additional Information:
- Production Capacity: 100000
- Delivery Time: Immediate
- Packaging Details: Brand New PP Bags
Microsilica Micro White Silica Fume in chennai
Minimum Order Quantity: 100 Kg
Product Brochure
| Packaging Size | 50 Kgs |
| Purity | 99% |
| Usage/Application | Building & Construction |
| Grade | Concrete Grade |
| State | Powdered |
| Color | White |
| Density | 0.76 gm/cc |
| Boiling Point | 2.623 Deg C |
| Brand | Astrra Chemicals |
| Country of Origin | Made in India |
We are leading manufacturers, exporters and suppliers of the best quality Microsilica ( Silica Fume Densified ) in Ambattur, Chennai, Tamilnadu, India. It is a construction chemical, which is also known as silica fume. Commonly it is used mineral admixture in high strength concrete. If it gets mixed with the concrete, it enhances the strength and workability. It is commonly used in the construction of bridges and nuclear plants.
Features:
Longer shelf life
Accurate composition
Optimum binding strength
Purity
Accurate composition
Longer shelf life
Aggregate Concrete
Concrete Admixture
Cement admixture
Ultra High Strength Concrete
CERTIFICATE OF ANALYSIS
MICROSILICA – (SILICA FUME)
|
PHYSICAL PROPERTIES |
RESULTS |
|
PHYSICAL STATE |
Micronised Powder |
|
ODOUR |
Odourless |
|
APPEARANCE |
White Colour Powder |
|
COLOUR |
White |
|
PACK DENSITY |
0.77 gm/cc |
|
pH of 5% SOLUTION |
6.91 |
|
SPECIFIC GFRAVITY |
2.64 |
|
MOISTURE |
0.055% |
|
OIL ABSORPTION |
54 ml / 100 gms |
|
CHEMICAL PROPERTIES |
|
|
SILICA (SIO2) |
99.920% |
|
ALUMINA (Al2O3) |
0.031% |
|
FERRIC OXIDE (Fe2O3) |
0.012% |
|
TITANIUM OXIDE (TiO2) |
0.000% |
|
CALCIUM OXIDE (CaO) |
0.000% |
|
MAGNESIUM OXIDE (MgO) |
0.000% |
|
POTTASIUM OXIDE (K2O) |
0.002% |
|
SODIUM OXIDE (Na2O) |
0.004% |
|
LOSS ON IGNITION |
0.001% |
|
HEAVY METALS: LEAD (Pb) ARSENIC (As) |
0.000% 0.000% |
Additional Information:
- Production Capacity: 1000 tonnes
- Delivery Time: 7 days
- Packaging Details: Brand New HDPE Bags
Micro Silica Fume 920 D In Chennai
Minimum Order Quantity: 100 Kg
Product Brochure
| Packaging Size | 50 KGS |
| Purity | 99% |
| Usage/Application | Construction Industry |
| State | Powdered |
| Grade | CONCRETE |
| Location/City | Chennai |
| Material | SILICA FUME |
| Color | White |
| Packaging Type | HDPE Bag |
| Grade Standard | CONSTRUCTION |
| PH Value | 5-13 |
| Brand | Astrra Chemicals |
Additional Information:
- Production Capacity: 100000
- Delivery Time: Immediate
- Packaging Details: 50 Kgs Brand New PP Bags
Microsilica Micro White Silica Fume
Minimum Order Quantity: 100 Kg
Product Brochure
| Packaging Size | 50 kg |
| Purity | 99% |
| Usage/Application | Construction Industry |
| State | Powdered |
| Color | White |
| Density | 0.76 gm/cc |
| Melting Point | 1,710 Deg C |
| Brand | Astrra Chemicals |
| Formula | SiO2 |
Additional Information:
- Production Capacity: 100000
- Delivery Time: Immediate
- Packaging Details: 50 Kgs Brand New PP Bags
Silica Fume Microsilica (White)
Minimum Order Quantity: 50 Kg
Product Brochure
| Packaging Size | 50 kg |
| Purity | 99% |
| Usage/Application | Construction Industry |
| Color | White |
| Country of Origin | Made in India |
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)
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High surface area (~15,000–30,000 m²/kg)
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Pozzolanic reactivity (reacts with calcium hydroxide)
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High silicon dioxide content (typically >90%)
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High-Performance Concrete (HPC):
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Enhances compressive strength, durability, and abrasion resistance.
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Used in bridges, marine structures, tunnels, and industrial floors.
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Shotcrete Applications:
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Improves adhesion, reduces rebound, and enhances early strength in tunnel linings and slope stabilization.
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Benefit: Increases lifespan and structural integrity, especially in aggressive environments.
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Used in castables and monolithic refractories as a binder and filler.
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Improves density, thermal stability, and mechanical strength of refractory linings.
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Benefit: Withstands high temperatures and aggressive chemical conditions.
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Oil well cementing:
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Enhances cement strength and reduces permeability under high-pressure, high-temperature conditions.
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Benefit: Ensures better sealing and long-term stability of wellbores.
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Acts as a filler in epoxy resins, rubber, and paints to improve strength, UV resistance, and abrasion resistance.
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Benefit: Enhances mechanical and chemical performance of finished products.
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Used in advanced ceramics, insulators, and electronic components for its high purity and thermal properties.
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Benefit: Contributes to high-performance, heat-resistant components.
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Sometimes used in waste stabilization and soil solidification processes.
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Enhances the binding and immobilization of hazardous substances.
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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
Silica Fume White In Chennai
Minimum Order Quantity: 50 Kilogram
Product Brochure
| Packaging Size | 50 Kg/bag |
| Purity | 99% |
| Usage/Application | Construction Industry |
| State | Powdered |
| Color | White |
| Packaging Type | HDPE Bags |
| Density | 0.76 gm/cc |
| PH Value | 6.90 |
| Brand | Astrra Chemicals |
| Country of Origin | Made in India |
We are leading manufacturers and exporters of the best quality Microsilica ( Silica Fume Densified ). It is a construction chemical, which is also known as silica fume. Commonly it is used mineral admixture in high strength concrete. If it gets mixed with the concrete, it enhances the strength and workability. It is commonly used in the construction of bridges and nuclear plants.
Features:
Longer shelf life
Accurate composition
Optimum binding strength
Purity
Accurate composition
Longer shelf life
Aggregate Concrete
Concrete Admixture
Cement admixture
Ultra High Strength Concrete
CERTIFICATE OF ANALYSIS
MICROSILICA – (SILICA FUME)
|
PHYSICAL PROPERTIES |
RESULTS |
|
PHYSICAL STATE |
Micronised Powder |
|
ODOUR |
Odourless |
|
APPEARANCE |
White Colour Powder |
|
COLOUR |
White |
|
PACK DENSITY |
0.77 gm/cc |
|
pH of 5% SOLUTION |
6.91 |
|
SPECIFIC GFRAVITY |
2.64 |
|
MOISTURE |
0.055% |
|
OIL ABSORPTION |
54 ml / 100 gms |
|
CHEMICAL PROPERTIES |
|
|
SILICA (SIO2) |
99.920% |
|
ALUMINA (Al2O3) |
0.031% |
|
FERRIC OXIDE (Fe2O3) |
0.012% |
|
TITANIUM OXIDE (TiO2) |
0.000% |
|
CALCIUM OXIDE (CaO) |
0.000% |
|
MAGNESIUM OXIDE (MgO) |
0.000% |
|
POTTASIUM OXIDE (K2O) |
0.002% |
|
SODIUM OXIDE (Na2O) |
0.004% |
|
LOSS ON IGNITION |
0.001% |
|
HEAVY METALS: LEAD (Pb) ARSENIC (As) |
0.000% 0.000% |
Additional Information:
- Production Capacity: 100000
- Delivery Time: Immediate
- Packaging Details: 50 Kgs Brand New PP Bags
Silica Fume (Microsilica) (White)
Minimum Order Quantity: 100 Kg
Product Brochure
| Packaging Size | 50 Kg/Bag |
| Purity | 99% |
| Form | Powder |
| Usage/Application | Construction Industry |
| Color | White |
| Packaging Type | HDPE Bag |
| Ph Value | 4-7 |
| Brand | Astrra |
| Country of Origin | Made in India |
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:
- High-Performance Concrete (HPC): Improves compressive strength, durability, and resistance to chemical attack in concrete used for bridges, highways, and skyscrapers.
- Decorative and Architectural Concrete: Enhances the aesthetic appearance while increasing strength, used in white or light-colored concrete surfaces like facades, floors, and countertops.
- Precast Concrete Elements: Used in producing precast items like beams, panels, and girders due to its ability to improve strength and reduce permeability.
- Shotcrete: Applied in tunneling, mining, and slope stabilization, offering improved adhesion, less rebound, and higher strength.
- Refractory Materials: Used in castable refractories to enhance high-temperature resistance and reduce porosity in applications such as furnaces and kilns.
- Grouts and Mortars: Improves the bond strength and reduces shrinkage in grouts used for filling cracks and gaps in construction.
- Oil Well Cementing: Enhances the strength and reduces permeability of oil well cement, especially in high-pressure, high-temperature environments.
- Polymer and Coating Filler: Used as a filler in polymers and coatings to improve durability and mechanical properties without affecting color or appearance.
- Marine Structures: Increases resistance to chloride penetration, ideal for use in marine environments to prevent corrosion of reinforcing steel.
- 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