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The use of silica fume has attracted more and more attention in the industrial field. At present, the use of silica fume mainly concentrates on the following aspects:
Silica fume is used in mortar and concrete: reactive powder concrete (RPC), track slab admixture, high-rise buildings, harbour wharf, reservoir dam, water conservancy, culvert, railway, highway, bridge, subway, tunnel, Airport runway, concrete pavement and coal mine roadway anchor shotcrete reinforcement.
2 Silica fume is used in material industry:
(1) The service life of high-grade, high-performance and low-cement refractory castables and prefabricated parts is three times as long as that of ordinary castables, and the refractoriness is increased by about 100 C. The high-temperature strength and thermal shock resistance are obviously improved. It has been widely used in coke oven, ironmaking, steelmaking, steel rolling, non-ferrous metals, glass, ceramics and power generation industries.
(2) Large-scale iron ditches and ladles, air permeable bricks, smearing and repairing materials, etc.
(3) Self-flowing refractory casting material and dry-wet spraying construction application.
(4) oxide bonded silicon carbide products (ceramic kiln furniture, flame barrier, etc.).
_High temperature calcium silicate light insulation material.
_Corundum mullite push board for electric porcelain kiln.
High temperature wear resistant materials and products.
Corundum and ceramics.
_Cylon bonded products.
Silica fume is used in new wall materials and decorative materials.
Polymer mortar, insulation mortar and interface agent for wall insulation.
(2) Cement-based polymer waterproofing materials.
(3) Lightweight aggregate thermal insulation energy-saving concrete and products.
(4) Putty powder is used for interior and exterior wall construction.
Other uses of silica fume:
(1) Silicate brick raw materials.
Production of sodium silicate.
It can be used as reinforcing material for organic compounds. Because its composition is similar to that of silica produced by gas phase method. It can be used as filling and reinforcing materials in rubber, resin, paint, unsaturated polyester and other macromolecule materials.
(4) Used as anti-caking agent in chemical fertilizer industry.
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