Densified silica fume for Ports, bridges, brine project Product Description: 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...Send Inquiry
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 ℃, SiO gas containing gas sent to meet the air below 1100 ℃ with oxygen reaction to produce SiO2, after cooling The formation of high-fineness particles, the filter is collected by the filter is silicon powder. The color of the micro-silica powder is between the light gray and the dark gray, SiO2 itself is colorless, its color depends mainly on the content of carbon and iron oxide, the higher the carbon content, the darker the color, the other Natural silica fume color dark. The particle size of the silica powder is less than 1um, the average particle size is about 0.1um, which is 1/100 of the diameter of the cement particles. Therefore, the silica powder can be highly dispersed in the concrete and filled with the cement particles to improve the density. Silica powder has a very high activity, can be faster and more comprehensive and hydration of hydrogen hydride hydration reaction.
1).Appearance is as grey&white off.
2).High electrical resistivity
4).Superior resistance to chemical attack from chlorides,acids and sulfates
5).Low chloride ion diffusion
6).High reactive Pozzolan
7).High temperature strength
8).Improved stability ingeothermal environment
How Does Silica Fume Work in Concrete?
When densified silica fume is added to concrete, initially it remains inert. Once portland cement and water in the mix start reacting with each other (hydrating), primary chemical reactions produce two chemical compounds: Calcium Silicate Hydrate (CSH), which is the strength producing crystallization, and Calcium Hydroxide (CH), a by-product also called free lime which is responsible for nothing much other than lining available pores within concrete as a filler or leaching out of inferior concrete.
Pozzolanic reaction occurs between silica fume and the CH, producing additional CSH in many of the voids around hydrated cement particles. This additional CSH provides the concrete with not only improved compressive, flexural and bond- strength but also a much denser matrix, mostly in areas that would have remained as small voids subject to possible ingress of deleterious materials.
(1) water conservancy and hydropower projects: dam intake, diversion channel, tunnel, surge tank, the main structure of the lower part of the plant (especially the water machine volute) and other hydraulic buildings, make full use of silica fume concrete has a good waterproof, Penetration, abrasion resistance and anti-cavitation characteristics.
(2) civil engineering: micro-silica fume concrete with early strength, high strength characteristics, a large number of industrial plants, high-rise buildings. Such as Liaoning Anshan International Hotel C50 concrete, Beijing Finance and Taxation Building C110 concrete. Can increase the strength, reduce the cross-sectional size of components, shorten the duration, but also save the project cost.
(3) Highway construction: make full use of micro-silica fume concrete early strength, high strength, wear resistance, you can build high-grade highways, airport runways, road tunnels and road repair and other projects. Yizheng Chemical Fiber Company built the road with silica fume concrete in the center of the factory. The 12-hour compressive strength reached 25 MPa, the abrasion resistance increased by 1 times and the 24-hour compressive strength reached 37MPa, exceeding the design requirements of C20 concrete.
(4) ports, bridges, brine works: micro-silica fume concrete high density, but also has a high resistivity, easy to form electrochemical damage, enhanced anti-corrosion performance. Hong Kong Tsing Ma Bridge, Jiangsu Lianyungang Timber Terminal, Chongqing Great Buddha Temple Yangtze River Bridge is a successful application example.
(5) Shotcrete Concrete: The incorporation of micro-silica fume in concrete significantly improved the adhesion and cohesion of the plastic concrete, greatly reduced the amount of rebound, increased the thickness of the shotcrete once forming, shortened the construction period, Cost. In Europe and the United States, 75% of the shotcrete are mixed with silicon powder, while Norway and Sweden, micro-silica fume is the necessary material for spraying concrete.
Techenical Data use for precast concrete with SGS testing
Testing Standrds of Slica fume/Microsilica
Jumbo bag with UV- Proof function and anti-aging character.
20kgs/25kgs Double layers paper bags
10kgs /12kgs water solube paper bag.
It should be stored in a dedicated warehouse that is well-ventilated and dry,and the condition is with waterproof & mostureproof,without ultraviolet radiation attack
Conveniently transport by Road, Railway,Sea, Pay attention to waterproof & moistureproof during transportation.
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Winitoor hot sale high performance microsilica use for precast concrete with SGS testing
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