Silica fume for Shotcrete Silica fume is a widely used material in shotcrete, although it can not be considered as an admixture. It is a kind of material with very strong volcanic ash activity, which can not only improve the adhesion of the thick lining, but also obtain high early strength. In many construction, the […]
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Because of the special properties of micro silica fume, it can be applied to water conservancy and Hydropower Engineering, and provide high wear resistance and corrosion resistance, and enhance water resistance of engineering. The cost of engineering is saved, and the service life of the project is extended to a great extent. For example, the
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The use of micro silica fume in bridge engineering can effectively improve the overall structural strength of the bridge, and solve the problems of corrosion resistance and folding resistance of the key parts. It also has high mobility, filling, clearance and resistance to segregation and so on, and provides good construction environment. The construction of
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Silica fume concrete is a kind of developing composite material, which plays a key role in the construction of high speed railway. It can optimize the use of material for concrete engineering, improve economic efficiency, make the project durable and have little influence on the environment. The physical, mechanical and durability comparison of HPC (high
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1. Overview of pump concrete: The pump concrete refers that the slump of the concrete mixture is more than or equal to 100mm, and use pump construction team. In the construction site, this type of concrete is usually poured through the pressure pump and the conveying pipe. At present, more and more production enterprises of
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Filling effect In the concrete mixing compound, in order to obtain liquidity requirements for the construction, often need to add some water (more than cement hydration water required to add water), these not only make the cement slurry is thinning, cementation weakened, and the excess residual moisture or water blisters formed in concrete, with concrete
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Silica fume: the appearance is grey or gray – white powder, and the refractoriness is >1600℃. Undensified Silica Fume (320-360kg/m³) Densified Silica Fume (630-680 kg/m³) The fineness of silica fume: the fineness of the silica fume less than 1um is over 80%, the average particle size is from 0.1 to 0.3um, and the specific surface
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The silica fume is also called microsilica or microsilica fume. When ferroalloy is smelting ferrosilicon and industrial silicon (metal silicon). A lot of volatile SiO2 and Si gases are produced in the submerged arc furnace. After the gas is discharged, it is rapidly oxidized, condensed and precipitated with air. It is a byproduct of large
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Silica fume is a by product of high purity quartz, coke and sawdust reduction in the production of ferrosilicon or metallic silicon during the production of complex reactions in smelting. Among them, the quartz stone and carbon at 1750 ℃, the reduction reaction to produce unstable carbon monoxide, the temperature is higher than 2160 ℃,
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Micro-silica fume is a by product of high purity quartz, coke and sawdust reduction in the production of ferrosilicon or metallic silicon during the production of complex reactions in smelting. Among them, the quartz stone and carbon at 1750 ℃, the reduction reaction to produce unstable carbon monoxide, the temperature is higher than 2160 ℃,
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