Silicas
Microsilica Grey
Silica fume for high-strength, low-permeability concrete and refractories.
Minimum order1 MT
HS code2811.22
OriginIndia
Packaging25 kg bags or 1 MT jumbo bags
Overview
Microsilica (silica fume) is an ultra-fine amorphous silica collected from silicon and ferrosilicon production. Its particles are about 100 times finer than cement, so it fills voids and reacts with free lime to make concrete much denser and stronger.
We supply densified and undensified grades for high-performance concrete, shotcrete, repair mortars, oil-well cementing and refractory castables.
Typical specifications
| SiO₂ | ≥ 85% (grades up to 92%) |
|---|---|
| Specific surface (BET) | 15 – 30 m²/g |
| Bulk density | 200–350 kg/m³ (undensified), 500–700 kg/m³ (densified) |
| Retained on 45 µm | ≤ 10% |
| Standards | ASTM C1240, EN 13263, IS 15388 |
Typical values. Exact specifications are confirmed on the certificate of analysis for each lot.
Applications
- High-strength and high-performance concrete
- Shotcrete and repair mortars
- Marine and nuclear structures
- Oil-well cementing
- Refractory castables
Industries
Questions about Microsilica Grey
Densified or undensified?
Densified microsilica is easier to transport and handle in bulk; undensified disperses more easily in small batches and dry mixes.
What is Microsilica Grey used for?
Microsilica Grey is used for high-strength and high-performance concrete, shotcrete and repair mortars, marine and nuclear structures, oil-well cementing and refractory castables. Typical buyers are in construction & concrete, refractories & ceramics, marine & nuclear and waste management.
What are the typical specifications of Microsilica Grey?
SiO₂: ≥ 85% (grades up to 92%); Specific surface (BET): 15 – 30 m²/g; Bulk density: 200–350 kg/m³ (undensified), 500–700 kg/m³ (densified); Retained on 45 µm: ≤ 10%; Standards: ASTM C1240, EN 13263, IS 15388. These are typical values; each lot ships with a certificate of analysis.
What is the minimum order quantity for Microsilica Grey?
The minimum order for Microsilica Grey from M2 Exports India is 1 MT.
How is Microsilica Grey packed for export?
Microsilica Grey is packed in 25 kg bags or 1 MT jumbo bags.
What is the HS code for Microsilica Grey?
Microsilica Grey is usually classified under HS code 2811.22. Confirm the code for your grade with your customs broker.
Who supplies Microsilica Grey in India?
M2 Exports India, based in Chennai, manufactures, supplies and exports Microsilica Grey (origin: India). It ships worldwide by sea and air on FOB, CFR or CIF terms, and by road within India.
How do I get a price or a sample of Microsilica Grey?
Request a quote or a free sample on the Microsilica Grey page at https://www.m2exports.com/products/microsilica-grey, email sales@m2exports.com or message WhatsApp +91 94440 36345. Replies usually come within one working day.
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