Product Introduction

85% Densified Silica Fume, also known as Microsilica, is an ultrafine amorphous silicon dioxide (SiO₂) material produced as a by-product during the manufacture of silicon metal and ferrosilicon alloys. Through a densification process, the extremely fine particles are agglomerated into larger granules, significantly increasing bulk density while maintaining excellent pozzolanic activity.

Compared with undensified silica fume, 85% Densified Silica Fume offers improved handling, reduced dust generation, lower transportation costs, and easier storage. It is widely used in concrete, refractory materials, oil well cement, shotcrete, and precast concrete where enhanced durability, strength, and long-term performance are required.

With stable quality, competitive pricing, and reliable global supply, our 85% Densified Silica Fume provides an economical solution for manufacturers seeking consistent performance in demanding construction and industrial applications.

Key Features

• 85% Minimum SiO₂ Content – Provides reliable pozzolanic performance for a wide range of construction applications.
• Densified Form – Reduced dust during handling, storage, and transportation.
• Improved Flowability – Suitable for automatic batching systems and bulk material handling.
• Enhanced Concrete Performance – Improves compressive strength, abrasion resistance, and durability.
• Lower Permeability – Reduces water penetration and improves resistance to chloride attack.
• Cost-Effective Transportation – Higher bulk density allows more efficient container loading and lower logistics costs.
• Environmentally Friendly – Recycled industrial mineral supporting sustainable construction.

Technical Specifications

Applications

Ready-Mix Concrete

Improves compressive strength, durability, and resistance to water penetration while reducing bleeding and segregation.

Shotcrete

Enhances cohesion and pumpability while minimizing rebound, making it ideal for tunnel construction and underground engineering.

Refractory Materials

Used in refractory castables, gunning mixes, and repair materials to improve particle packing, high-temperature strength, and thermal shock resistance.

Oil Well Cement

Improves slurry stability, reduces permeability, and increases long-term durability under high-pressure and high-temperature conditions.

Precast Concrete

Provides higher early and ultimate strength while producing denser concrete with improved surface finish and durability.

Product Benefits

Using 85% Densified Silica Fume offers several important advantages:

• Improves compressive and flexural strength.
• Reduces concrete permeability.
• Increases resistance to chloride penetration and sulfate attack.
• Enhances abrasion and erosion resistance.
• Reduces dust during production and transportation.
• Lowers shipping and storage costs due to higher bulk density.
• Maintains excellent pozzolanic activity after densification.
• Suitable for automated production lines and batching plants.

Packaging & Storage

Our 85% Densified Silica Fume is available in:

• 25 kg waterproof plastic bags
• 1000 kg jumbo bags
• Customized packaging upon request

Store the product in a clean, dry, and well-ventilated warehouse. Keep the bags tightly sealed and protected from moisture. Under proper storage conditions, the product maintains its performance for up to 12 months.

Quality Assurance

Every batch is produced under a strict quality management system and tested before shipment to ensure consistent chemical composition and stable physical properties. Comprehensive quality inspections include SiO₂ content, moisture, bulk density, particle size distribution, and loss on ignition. Test reports and Certificates of Analysis (COA) are available upon request.

Why Choose Our 85% Densified Silica Fume/ Microsilica?

• Stable and consistent product quality
• Strict quality inspection before shipment
• Professional technical support
• Global export experience
• Flexible packaging solutions
• Competitive factory-direct pricing
• Fast delivery and reliable logistics
• OEM and private label services available