Condensed silica fume is a byproduct of the production of silicon metal or ferrosilicon alloys. It is composed of very fine glassy spheres of silica having an average diameter of 0.1 µm. It is a very reactive pozzolan that has been found to be highly beneficial in concrete.
Condensed silica fume is used as a replacement for portland cement in concrete. It can replace up to 15% of the cement by mass, without sacrificing strength or durability. In fact, concrete made with condensed silica fume is typically stronger, more durable, and more resistant to chemicals and abrasion than concrete made with portland cement alone.
Application of condensed silica fume in concrete
- High-performance concrete for bridges, buildings, and other structures that require high strength and durability
- Concrete that is exposed to aggressive environments, such as marine environments or deicing salts
- Concrete that requires high resistance to chemicals or abrasion
- Concrete that is used in thin sections, such as shotcrete or precast concrete
Applications of condensed silica fume in other areas
- Grouts and mortars
- Refractory materials
- Adhesives and sealants
- Coatings and paints
- Oil well cementing
Condensed silica fume is a valuable material that can be used to improve the performance of concrete and other materials. It is a sustainable material that is made from a byproduct of the silicon industry.
The benefits of using condensed silica fume in concrete
- Increased strength and durability
- Increased resistance to chemicals and abrasion
- Reduced permeability to chloride ions
- Reduced shrinkage and cracking
- Improved workability
- Improved surface finish
Condensed silica fume is a versatile material that can be used to improve the performance of concrete in a variety of applications. It is a sustainable material that is made from a byproduct of the silicon industry.