RW Microsilica (Silica Fume)

  • RW Microsilica, a byproduct of ferrosilicon alloy production in electric arc furnaces, is an ultra-fine pozzolanic material composed of amorphous silicon dioxide (SiO₂ >90%). With particle sizes averaging 0.1 micron, it significantly enhances concrete’s mechanical properties and durability, particularly in aggressive environments. Compliant with ASTM C1240.
RW Microsilica (Silica Fume)
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Key Applications:
– Marine Structures: Piers, coastal bridges, seawalls
– High-Performance Concrete: High-strength mixes (70+ MPa)
– Infrastructure: Dams, tunnels, water tanks, canals
– Corrosion Resistance: Chloride/sulfate-prone environments
– Decorative & Flooring Concrete

 

Performance Benefits:
✔ Strength Boost: Increases compressive, flexural, and tensile strength
✔ Durability: Reduces permeability by 50–70% vs. conventional concrete
✔ Chemical Resistance: Blocks chloride/sulfate ingress (extends service life)
✔ Pozzolanic Reaction: Reacts with Ca(OH)₂ to form dense C-S-H gel

 

Technical Specifications:
| Property | Value |
|———————–|————————–|
| Physical State | Light gray powder |
| Particle Shape | Spherical, amorphous |
| Specific Gravity | 2.50 g/cm³ |
| Chemical Analysis | |
| SiO₂ | 94.6–96.4% |
| Moisture (H₂O) | ≤0.08% |
| Chlorides (Cl⁻) | ≤0.04% |

Packaging: 25 kg bags, 40 kg bags, or 1-ton bulk bags
Shelf Life: 6 months (store dry, avoid extreme temps)

 

Usage Guidelines
– Dosage: 3–7% of cement weight (replace cement 1:1 for strength gain)
– Critical Note: Always use with superplasticizers to offset water demand and prevent cracking.
– Mixing: Blend with dry aggregates first, then add water + superplasticizer.

 

Safety & Compliance
PPE Required: NIOSH-approved respirator, gloves, and goggles during handling.
First Aid: Flush eyes/skin with water if exposed.
Eco Note: Do not dispose in waterways or soil.

Certification:
Manufactured to ISO and ASTM international standards.

 

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