Silica fume is widely used in many fields, mainly including the following aspects:
Concrete engineering: Silica fume is widely used in concrete engineering, which can significantly improve the compressive, flexural and impermeability properties of concrete. It is often used to prepare high-strength and high-performance concrete, and is suitable for projects that need to resist corrosive environments such as sulfates and chlorides, such as hydraulic concrete and dam construction. Silica fume can also reduce the amount of dust on the ground and increase the thickness of a single spray layer, so it is often used in shotcrete engineering.
Building materials: Silica fume can be used as an additive for self-leveling concrete, amorphous refractory materials, dry-mixed mortar and high-strength non-shrinkage grouting materials to improve the performance and stability of these materials. In addition, silica fume can also be used as a soil conditioner to improve the stability and frost resistance of the soil by filling the soil gaps, and prevent soil settlement and erosion.
Coating industry: As a coating filler, silica fume can improve the toughness and durability of the coating, maintain the flatness and glossiness of the coating surface, reduce oil absorption, and enhance corrosion resistance.
Flame retardant: Silica fume is used as a flame retardant in many occasions and has excellent flame retardant properties and stability. It can be added to wall materials, floor and roof materials, and thermal insulation materials to improve the fire resistance of these materials. Silica fume is also widely used in wires and cables, automotive interior materials such as roof linings, seats, dashboards, etc. to improve the flame retardant properties of these materials. In addition, silica fume can also be used to make polymer materials such as flame retardant coatings and flame retardant plastics.
Ceramic industry: Wollastonite powder is used in the ceramic industry to enhance the mechanical properties of ceramics, reduce firing temperatures, improve thermal stability and thermal shock resistance, and improve glaze quality. It is widely used in building ceramics and daily ceramics, significantly improving the strength, wear resistance and frost resistance of the products.
Other applications: Silica fume can also be used to make wear-resistant industrial flooring, repair mortar, polymer mortar, thermal insulation mortar and other building materials. In addition, silica fume is also used in the fields of new energy vehicle battery pack sealing and building fireproof sealants, which can significantly improve the fire and waterproof properties of materials.