TOPKEN Silica Fume

Silica fume, also called Microsilica, is a byproduct of producing silicon metal or ferrosilicon alloys. Silicon metal and alloys are produced in electric furnaces. The raw materials are quartz, coal, and woodchips. The smoke that results from furnace operation is collected and sold as silica fume, rather than being landfilled. Silica fume consists primarily of amorphous (non-crystalline) silicon dioxide (SiO2), its average granule diameter is 0.15 0.20 µm, specific surface area is 15000 20000 m2/kg, and it has extremely strong surface active.Because of its fine particles, large surface area, and the high SiO2 content, silica fume is a very reactive pozzolan when used in concrete. At the same time, silica fume can still be used in the production of refractory and porcelain; to raise intensity and durability .it also can improve the material overall performance as a filler, used in paint, coating, resin, rubber and other high molecular material.TOPKEN silica fume in refractory 1.Enhancing the fluid of pouring refractory, reducing the volume of used water, be easy to shape, and raising the production efficiency. 2.Because of its untramicrostructure for gap filling, the compact and intensity of refractory gain rising by a wade margin. 3.TOPKEN silica fume is a highly effective pozzolanic material, so it's easy to come into being Mullite Phase, under the premise that Al2O3 exists, enhance elevated temperature strength and thermal shock of refractory. TOPKEN Silica Fume in Concrete The uses for TOPKEN silica fume in concrete fit into general categories of enhancing mechanical properties, improving durability, enhancing construct ability. 1. Making high-grade concrete effectively enhances the strength and pumpability of strong concrete. 2. Making high crack-resistance, self-waterproofing concrete, be used in the subway, tunnel and basement of high-rise structures. 3. Used in maritime works and chemical industry. Owing to the compactability, it can prevent effectively sulphate and chlorine ion from osmosizing and eroding Avoid the steel corroding in armoured concrete (RC), lengthen the life-span of concrete. 4. Effects on high-early strength concrete and strong concrete. 5. In project item for water conservancy and bridge, the concrete not only needs basic quota mentioned above, but also its wear-resistant quality and abrasion resistance. Thus, adding TOPKEN silica fume is necessary. 6. Effects on shortcreting-lined concrete for support in tunnel, subway, and large-scale foundation ditch. 7. Used in the construction item under water, such as pier, huge dam and drilling platform. 8. Used in road surface concrete of expressway and large-scale bridge.