Undensified Silica Fume
Undensified Silica Fume (Microsilica)
Undensified Silica Fume, also known as raw silica fume or primary silica fume, it is chemically similar to densified silica fume, but a different density.This type of silica fume is incredibly light, has a density of 250-350 kg/m3, is very active, and requires a large storage space.
Undensified silica fume is more convenient to use, because of the characteristics of small particles, easy to disperse, basically do not need to increase the concrete mixing time. It has the characteristics of increasing the compressive and flexural strength of concrete, water penetration resistance, good filling effect and good adaptability to water reducing agents. The color of as-built silica fume will be lighter than that of densified silica fume, so it will not deepen the color of concrete.
The low bulk density of Undensified silica fume leads to higher transport costs,manufacturers need to invest more packaging costs, in addition, the Undensified silica fume is more active, easy to drift caused by the phenomenon of fly ash on site feeding, resulting in secondary pollution.
Undensified Silica Fume Advantages
Greater Impermeability
Barring the ingress of moisture, chemicals and other contaminantsHigh Early Strengths
Assuring increased efficiency and greater cost effectiveness in production of prestressed and precast concreteHigh Compressive Strengths
Proportionate to amount of silica fume and the water-to-cementitious ratioGreater Resistance
Substantially greater resistance to corrosion, abrasion and erosion, chemical attack and freeze/thaw damageUndensified Silica Fume Applications
- Refractories. Silica fume is commonly used in castable, sintered, and fused refractories. For example, it can be used in high-performance, high-grade, and low-cement refractory castables and prefabricated parts, air permeable bricks, large-scale iron trenches and ladles, and more.
- Mortar and concrete. Silica fume can also be used for harbour wharfs, high-rise buildings, railway bridges, reservoir dams, concrete pavement, and more.
- Protective coatings. Nano-silica sol serves as an active material for fire protection, environmental protection, and anticorrosive coating.
- Wall and decorative materials. Silica fume can also be used for thermal insulation mortar, polymer mortar, and as an interface agent for wall insulation.
- Putty. Microsilica can be used in putty powder for exterior and interior wall insulation.
- Filling and reinforcement. It is also used as filling and reinforcing materials in resin, rubber, paint, unsaturated polyester, and more.
- Additives. Finally, silica fume is commonly used as an additive in other active areas.
Packaging
- 10kg soluble paper bags x 84 on the pallets.
- 20kg soluble paper bags x 42 on the pallets.
- 950kg plastic woven bags x 2 on the pallets(with or without bottom spout)
- 1000kg plastic woven bags x 2 on the pallets(with or without bottom spout )
- 500kg plastic woven bags x 2 on the pallets (with or without bottom spout )
The machine is automatically packed and filtered by a screen, so that no debris is mixed in.