Undensified Silica Fume
Maximum Reactivity for Superior Concrete Performance
Undensified Silica Fume
As-produced silica fume with maximum pozzolanic activity for the most demanding concrete applications. Unprocessed for optimal performance in specialized formulations
- Maximum Pozzolanic Activity
- As-Produced Purity
- Ultra-Fine Particle Size
- Ideal for Refractories
≥ 90%
SiO₂ Content
220-450 kg/m³
Bulk Density
≤ 3.0%
Moisture Content
15-20m²/kg
Specific Surface Area
Key Advantages of MH Undensified Silica Fume
Why choose our as-produced silica fume for specialized applications
Maximum Pozzolanic Reactivity
Unprocessed form ensures the highest chemical activity for superior strength development and faster reaction times in concrete mixtures.
Chemical Purity
As-produced without additional processing maintains the natural chemical composition and amorphous structure for optimal performance.
Superior Refractory Performance
Ideal for high-temperature applications where maximum silica content and reactivity are critical for refractory concrete performance.
Ultra-Fine Particle Distribution
Original particle size distribution provides excellent packing density and filler effect in specialized concrete formulations.
Technical Specifications
Comprehensive technical data for Undensified Silica Fume
| Parameter | Specification |
| SiO₂ Content | ≥ 90% |
| Moisture Content | ≤ 3.0% |
| pH Value | 4.0-8.0 |
| 45μm Sieve Residue | ≤ 10% |
| Alkali Content (Na₂O eq.) | ≤ 1.0% |
| Water Requirement | ≤ 125% |
| Specific Surface Area | 15-20 m²/kg |
| Loss on Ignition (LOI) | ≤ 6.0% |
| Activity Index (7 days) | ≥ 120% |
| Activity Index (28 days) | ≥ 125% |
| Bulk Density | 220-450 kg/m³ |
| Pozzolanic Activity Index | ≥ 105% at 7 days ≥ 115% at 28 days |
Applications of Our Undensified Silica Fume
Our microsilica products deliver outstanding performance across diverse sectors and challenging environments
Ultra-High Performance Concrete (UHPC)
Ultra-high performance concrete formulations where maximum reactivity is critical.
Refractory Concrete
High-temperature applications up to 1600°C for furnace linings and kiln furniture
Oilfield Cementing
Improves slurry properties and long-term integrity of cement sheaths in demanding wells.
Marine & Offshore Structures
Superior chloride resistance for bridges, ports and offshore platforms
Chemical-Resistant Flooring
Enhanced durability in chemical plants and industrial facilities
Waterproofing & Coatings
Creates an impermeable barrier and enhances high-purity polymer/GFRC coatings.
Global Shipping
Fast delivery to construction sites worldwide
Quality Certified
Batch-tested for consistent chemistry & particle size
Batch Consistency
Rigorous quality control for uniform performance
Technical Support
Expert guidance for your specific application needs
MH Undensified Silica Fume
Trusted by Global Industry Leaders
Discover why engineers and project managers worldwide rely on MH Undensified Silica Fume products
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