Performance intent
Lower permeability and chloride ingress while boosting compressive strength and abrasion resistance.
Product Construction Chemicals
Silica Fume (Microsilica)
Pozzolanic supplementary cementitious material (SCM) used to increase strength and durability and reduce permeability in high-performance concrete systems.
Formats: densified / undensified powder • slurry (by inquiry)
Packaging: bags / big bags (supersacks) / bulk (lane-dependent)
Documentation: SDS / COA / TDS (and compliance docs) on request
Typical use cases
HPC/UHPC, precast, marine & infrastructure concrete, shotcrete, industrial floors.
Mix design support
We align format and logistics to your batching method, dispersion capability, and quality targets.
Note: silica fume increases fines and may change workability. It is commonly paired with a compatible PCE superplasticizer to meet slump and strength targets.
Why silica fume is used
Silica fume is an ultra-fine, amorphous silica material that acts as a pozzolan and micro-filler. It refines pore structure, reduces bleeding and segregation, and improves the interfacial transition zone (ITZ) — resulting in denser concrete with higher durability.
Strength development
Commonly improves compressive and flexural performance when optimized in the mix design.
Durability
Reduced permeability supports improved resistance to chloride ingress and harsh exposure environments.
Surface & abrasion
Often used in industrial floors, precast, and shotcrete where abrasion resistance is valued.
Where it adds value
- High-performance concrete (HPC) and ultra-high performance concrete (UHPC)
- Marine/infrastructure concrete with durability requirements
- Shotcrete and tunnel lining mixes (finish and cohesion improvements)
- Precast elements and high-strength grouts (when specified)
Applications
Typical usage patterns. Share your project requirements and we’ll align the right specification and format.
Concrete and cementitious systems
- High-strength concrete mixes (reduced permeability and improved durability)
- Precast elements and architectural concrete (finish and density improvements)
- Shotcrete and repair mortars (cohesion and rebound control when optimized)
- Industrial flooring and abrasion-resistant surfaces
Typical dosage range (guidance)
Common starting point
Often ~5–10% of total cementitious materials (project- and standard-dependent).
Workability management
May increase water demand; commonly paired with PCE superplasticizer for slump targets.
Trial validation
Confirm performance via mix trials (strength, permeability, finish) before scale-up.
Note: selection and dosage should follow project specifications and applicable standards. We can supply a format aligned to your batching and dispersion process.
Typical specifications & formats
Values depend on grade, standard, and customer requirements. Final values confirmed on COA/TDS at quotation.
Standard (common)
ASTM C1240 / EN 13263 (confirm per offer)
SiO₂ content
Typically ≥ 85–95% (grade-dependent; confirm on COA)
Form
Densified powder / undensified powder / slurry (by inquiry)
Packaging
25 kg bags, big bags (supersacks), bulk (lane-dependent)
Documentation
SDS / COA / TDS; additional compliance docs on request
Handling note
Fine powder: dust control and suitable PPE recommended; consider densified or slurry for handling efficiency.
Storage & handling (general)
Follow supplied SDS and site procedures.
Storage
Keep dry and sealed. Protect from moisture ingress to prevent caking and performance variability.
Dispersion
Proper dispersion is critical for performance, especially for densified grades. Review batching sequence.
Admixture pairing
Often paired with PCE superplasticizer to maintain workability at target water/binder ratio.
Specifications and formats may vary by origin, batch, and packaging selection.