Our offered Silica Fume is a byproduct of producing silicon metal or ferrosilicon alloys. One of the most beneficial uses for silica fume is in concrete. Because of its chemical and physical properties, it is a very reactive pozzolan. Concrete containing silica fume can have very high strength and can be very durable. KGR Silica Fume consists primarily of amorphous (non-crystalline) silicon dioxide (SiO2). The individual particles are extremely small, approximately 1/100th the size of an average cement particle. Because of its fine particles, large surface area, and the high SiO2 content, silica fume is a very reactive pozzolan when used in concrete. The quality of silica fume is specified by ASTM C 1240.
Silica fume is a by-product from manufacturing silicon metal or ferrosilicon alloys. The smoke that results from furnace operation is collected and sold as silica fume, rather than being landfilled. Silica fume is widely used in concrete and refractory applications. One of the most beneficial uses for silica fume is in concrete. Silica fume consists primarily of amorphous (non-crystalline) silicon dioxide (SiO2).
The individual particles are extremely small, approximately 1/100th the size of an average cement particle. Because of its chemical & physical properties, like high silica content & extreme fineness, silica fume is a very effective pozzolanic material. Concrete containing silica fume can have very high strength and can be very durable.
Silica fume in refractory:
| Parameters | Typical Value |
| SiO2(%)Min. | 95-98 |
| Moisture(%)Max. | 0.5-3 |
| Loss on Ignition (L.O.I)@975°C(%)Max. |
0.5-6 |
| Coarse Particles (>45 micron, 325 mesh,%) |
5-10 |
| Specific Surface Area (BET,m2/g) | 15-22 |
| Bulk Density(kg/m3) | 200-650 |