|
|
| |
| Products |
|
 |
Silica Fume (Silica Dust,Condensed Silica Fume,Microsilica,Fumed Silica) |
|
|
|
|
|
 Click to enlarge image
|
 Model Number |
CAEC-FS |
Silica Fume( Microsilica,Fumed Silica,Condensed Silica Fume,Silica Dust )
Silica fume is a mineral admixture, composed of submicron particles of silicon dioxide, manufactured as a co-product from the production of silicon and ferrosilicon metal. When added to concrete, silica fume acts as both a filler, improving the physical structure by occupying the spaces between the cement particles and as a 'pozzolan,' reacting chemically to impart far greater strength and durability to concrete. silica fume powder is gray to off-white in color, and is available in several product forms and packaging options.
When added to precast and ready-mixed concrete, silica fume produces high-performance, high-strength concrete with an increased life-span and improved structural economics. Silica fume is available in its as-produced, undensified form. For greater convenience,Densified silica fume, with twice the bulk density, provides many benefits. It is dustless, uniform, smooth, free of lumps and flows readily for bulk handling applications. Dry densified silica fume is the most economical product form for transportation, as its higher density allows bulk handling methods, and reduced shipping costs.
BENEFITS
Prevents reinforcing steel corrosion in concrete, due to its extremely low permeability to chloride-ion intrusion and high electrical resistivity.
� Greater impermeability, barring the ingress of moisture, chemicals and other contaminants.
� High early strengths, assuring increased efficiency and greater cost effectiveness in production of prestressed and precast concrete.
� High ultimate compressive strengths (8,000-20,000 psi), proportionate to amount of silica fume and the water-to-cementitious ratio.
� Substantially greater resistance to corrosion, abrasion and erosion, chemical attack and freeze/thaw damage.
APPLICATIONS
Silica fume is ideal for use in structures exposed to chemical and environmental attack.
� Parking garages
� Bridge decks
� Marine structures
� Slabs
� Roadways
In precast concrete (made in a manufacturing environment) it is more efficient, and results in cost and time savings.
� High early and higher ultimate compressive strengths.
� Eliminates steam curing.
� Savings on heating costs and rapid turnover of forms.
In shotcrete applications, there is less material waste and greater efficiency of product use.
� High electrical resistivity and impermeability.
� Significantly less rebound loss.
� Mitigates reinforcing steel corrosion.
� Improved bonding strength.
� Thicker applications with each nozzle pass.
HANDLING
Bulk silica fume can be stored in ordinary cement silos and transported in bulk bag or cement tankers. It can be moved into cement storage silos and then handled with normal automated batching systems.
PACKAGING
Densified silica fume can be shipped via pneumatic tankers holding 20 to 24 tons, or in bulk "Super Sacks," 55 cubic foot polypropylene bags which hold approximately 2,000 pounds. Densified silica fume is also available in 25 pound "repulpable" paper bags and standard 50 pound bags.
Undensified silica fume can be shipped via pneumatic tankers holding 6 to 8 tons, or in bulk "Super Sacks" which hold approximately 1,300 pounds. It is also available in standard 50 pound paper bags.
Silica Fume Typical chemical composition
.Production of Silicon Metal
Component (% by weight) Silicon metal production
SiO2 93-98%
CL 0.09-02%
Available Alkalies 0.5-1.0%
.Production of Ferrosilicon metal
Component (% by weight) Silicon metal production
SiO2 78-85%
CL 0.09-02%
Available Alkalies 0.5-1.5%
%
Loss on Ignition(L.O.I) 1.5-3.5%
Moisture Content 0.1-0.35%
Particle size 0.03-0.1 microns
Retained on 325 Sieve(45 micro) 0.4-2.5%
Surface Area(BET method) 15-28m2/g
Dry Bulk Density(undensified) 10-16 lbs./ft3
Dry Bulk Density(densified) 30-40lbs./ft3
Please note, specifications are available upon requrest.
If you are interested in the above products, pls keep us advised, we will provide more details for your reference.
Thanks & Best Regards.
C A E C, Sales Division
LI LIN (Mr.)
TEL:+86 371 67668728
FAX:+86 371 67625837
BIZ.E-MAIL: sales[AT]cn-abrasives.com
MSN:caeclilin[AT]hotmail.com
|
|
|
|
| |
|
|
|
Related Keywords:
Bookmark / Share this page