Denser matrix
Fills microvoids and refines particle packing.
Silica fume grade
98% Undensified Silica Fume SF-98
Undensified microsilica · SiO₂ ≥ 98%
A 98% SiO₂ undensified silica fume engineered for high-purity UHPC, advanced castables and GRC/GFRC. Its controlled agglomeration improves handling and transport while allowing rapid dispersion under normal mixing shear.
Controlled SiO₂
Easy to disperse
Traceable batches
Export-ready supply
Silicon dioxide
≥98%
Appearance
Gray to light gray
Bulk density
240–400 kg/m³
Recommended applications
high-purity UHPC, advanced castables and GRC/GFRC
Product Overview
Consistent reactivity without sacrificing dispersion
A 98% SiO₂ undensified silica fume engineered for high-purity UHPC, advanced castables and GRC/GFRC. Its controlled agglomeration improves handling and transport while allowing rapid dispersion under normal mixing shear.
Fine amorphous particles fill capillary voids and support pozzolanic or ceramic bonding. Batch control covers chemistry, moisture, loss on ignition and bulk density (240–400 kg/m³). Ask MSILI to match the grade to your binder, dosage and process before scale-up.
Silicon dioxide
≥98%
Appearance
Gray to light gray
Bulk density
240–400 kg/m³
Recommended applications
high-purity UHPC, advanced castables and GRC/GFRC
Product Advantages
Direct Production, Stable Quality
Reliable mixing
Breaks down under normal mechanical shear without chemical binders.
Performance support
Can improve strength, impermeability and service durability when correctly formulated.
Stable sourcing
COA-backed lots and packaging options for trials or bulk production.
Technical Data
Chemical and Physical Properties
| Test Item | Typical Value | ASTM C1240 |
|---|---|---|
| SiO₂ Content | ≥98% | 85.0% minimum |
| Moisture Content | ≤1.0% | 3.0% maximum |
| Loss on Ignition | ≤2.0% | 6.0% maximum |
| Specific Surface Area | 15,000–25,000 m²/kg | — |
| Bulk Density | 240–400 kg/m³ | — |
| Activity Index (7 Days) | 115.0% | 105.0% minimum |
| Activity Index (28 Days) | ≥125% | — |
| Average Particle Size | 1.0 µm | — |
| 45 µm Sieve Residue | 3.0% | 10.0% maximum |
The data listed above is for reference only and does not constitute factory control specifications or acceptance criteria. Customers should conduct trials within their own systems to confirm product suitability.
Performance Comparison
Reference Test Data
Based on existing formulation tests, this section shows reference performance improvement from the micro-filling effect and pozzolanic reaction of silica fume. Actual results vary with matrix type, mix design, dosage, dispersion and process conditions, so sample testing is recommended.
Silica Fume Applications
Widely Used Across Industries
High-Purity UHPC
Optimizes fine-particle packing and the interfacial transition zone in thin panels, precast elements and architectural UHPC.
Ultra-High-Strength Precast Concrete
Supports uniform paste structure, dimensional accuracy and high-strength thin-wall production.
Advanced Refractory Castables
Promotes matrix densification and ceramic bonding for hot strength, erosion resistance and volume stability in severe linings.
Cement-Free and Ultra-Low-Cement Refractories
Limits impurity and low-melting-phase introduction in high-temperature, wear-resistant castable systems.
GRC/GFRC Products
Improves paste encapsulation and fibre–matrix bonding for strength, crack resistance and fine architectural finishes.
Advanced Composites
Functions as a high-purity ultrafine filler in resins, inorganic composites, engineered stone and wear-resistant flooring.
Quality Control
Comprehensive Testing Available
ASTM C1240
EN 13263-1
GB/T 27690
COA and batch documentation
SGS can perform testing upon request.
Packaging and Logistics
Flexible Packaging, Supplied on Demand
Small bags
For samples, laboratory trials and controlled manual dosing.
Bulk bags
For project use and factory production, with efficient storage and container loading.
Custom export packing
Pallets, liners, marks and documents matched to the route and handling method.
FAQ
Packaging, Loading and Shipping FAQ
Answers to common purchasing questions about packaging, export documents, sample trials, loading and delivery.
Where is SF-98 silica fume used?
98% serves high-purity UHPC, advanced castables and GRC/GFRC, including purity-sensitive UHPC, advanced castables, GRC/GFRC and functional composites.
Why choose SF-98 instead of another silica-fume grade?
The very low impurity load is valuable in cement-free or ultra-low-cement refractories, where low-melting phases can undermine high-temperature structure; relevant systems may be evaluated up to about 1700°C.
What does undensified SF-98 mean for transport and mixing?
Undensified here means controlled physical agglomeration, not a chemical binder. With a bulk density of 240–400 kg/m³ it improves loading and handling, while normal mechanical shear breaks the agglomerates down during mixing.
What dosage or formulation method is recommended for SF-98?
Optimise particle packing and dispersant demand in the full formulation. For GRC/GFRC and composites, also check fibre wetting, surface finish, shrinkage and dimensional stability.
Which specifications should be checked before buying SF-98?
Check SiO₂, moisture, loss on ignition, bulk density, particle-size or fineness data and application-relevant activity. Confirm the current lot on the COA and validate it with the actual binder or resin system.
Can MSILI supply samples and export packaging for SF-98?
Yes. Samples and small bags are available for laboratory trials; bulk bags, liners, pallets, shipping marks and batch documents can be matched to the production method and destination.
Supply Capacity
Stable Delivery, Traceable Batches
9+
Application Segments
10+ years
Industry Experience
10,000+
Traceable Batches
50,000+ t
Annual Supply Capacity
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