Micro silica fume 1.SiO2:90%-98% 2.High electrical resistivity and impermeability 3.Superior resistance to chemical attack

Micro silica fume

Specification:

Grey Densified and undensified Micro Silica Fume

Analysis Result

Analysis	Result
	SF85	SF88	SF90	SF92	SF94	SF96	SF97	SF98
SiO2(%)(min.)	85.05	88.05	99.05	92.05	94.05	96.05	97.5	98.5
Fe2O3 (%)	0.78	0.44	0.21	0.25	0.20	0.20	0.10	0.20
Al2O3 (%)	0.29	0.20	0.21	0.25	0.20	0.20	0.20	0.20
CaO (%)	0.39	0.30	0.36	0.30	0.30	0.30	0.30	0.30
K2O+ Na2O (%)	0.29	0.24	0.22	0.20	0.20	0.20	0.20	0.20
Moisture (%)	3.05	2.55	2.05	2.05	1.85	1.25	1.00	1.00
Loss on Ignition (L.O.I) @975OC (%)	4.38	3.38	2.38	2.38	2.28	1.88	1.55	1.50

 Note: the above specification is for your reference, some elements can be controlled as your requirement.

Main Function:

Very low permeability to chloride and water intrusion.Extremely high electrical resistivity (20 to 100 times greater than ordinary concrete).Increased abrasion resistance on decks, floors, highways and marine structures.Superior resistance to chemical attack from chlorides, acids, nitrates and sulfates.

Application: 

Silica fume in refractory

1.Enhancing the fluid of pouring refractory, reducing the volume of used water, be easy to  shape,and raising the production efficiency.

2.Because of its untramicrostructure for gap filling, the compact and intensity of refractory gain rising by a wade margin.

3.Silica fume is a highly effective pozzolanic material, so it's easy to come into being Mullite Phase, under the premise that Al2O3 exists, enhance elevated temperature strength and thermal shock of refractory.

Silica Fume in Concrete

1. Making high-grade concrete effectively enhances the strength  and pumpability of strong concrete. 

2. Making high crack-resistance, self-waterproofing concrete, be used in the subway, tunnel and basement of high-rise structures.

3. Used in maritime works and chemical industry. Owing to the compactability, it can prevent effectively sulphate and chlorine ion from osmosizing and eroding Avoid the steel corroding in armoured concrete (RC), lengthen the life-span of concrete.

4. Used in the construction item under water, such as pier, huge dam and drilling platform.

5. Used in road surface concrete of expressway and large-scale bridge.

Micro silica fume