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Microfume® Hydraulic

Amorphous light grey silicon oxide powder, obtained by filtering the dust extracted from the production of silico-calcium alloy in an electric arc furnace.

Microfume® Hydraulic is different due to its high CaO content, used in fast setting concrete. Concretes with Microfume® Hydraulic have higher strength than the average at an early age (24h and 48h) and need less superplasticizer addition in the mix design.

We are confident that we can satisfy your unique Microfume requirements. Just contact us to discuss them.

Microfume Hydraulic Physical and Chemical Characteristics:

Analysis** EN Norm project Typical Frequency
SiOâ‚‚ (%) Min. 70 72 Weekly
Total CaO (%) 15 – 25 18 Weekly
Free CaO (%) Max. 1.0 0.7 Weekly
Free C (%)
3.5 Weekly
Naâ‚‚O eq (%) To report 1.10 Weekly
SO₃ (%) Max. 2.0 0.8 Weekly
Free Si (%) Max. 0.7 0.3 Monthly
CI (%) Max. 0.3 0.05 Monthly
Loss on ignition
(at 950C during 1h)(%)
Max. 6.5 5.0 Weekly
Hâ‚‚O (%)
0.20 Weekly
Specific surface
(BET) (m²/g)
10 – 30 13 Monthly
Activity Index
at 28 days
Min. 95 105 Monthly
Bulk density

550 -700 Daily
Brightness L*
45 – 50

** % by weight of dry mass *** Lower limit detection

Bulk in trucks or in bags.

Dry storage. Avoid contact with moisture.

Product totally amorphous. Material Safety Data Sheet available on request.

High Performance Concretes. Self-levelling Concretes. Shotcretes.


Quality Control
Complies with the ISO 9001 norm.

Complies with the ISO 14001 norm.

Complies with the OHSAS 18001 norm.