Yuan Lei's Little Knowledge | The Difference between Silica Powder and Silica Powder
Silica powder? Silica powder? Hearing these two words, everyone may think that they are not the same thing. Is there any difference? Is it just a mistake? In fact, silica powder and silica powder are two different things, but their chemical compositions are basically the same. Next, let's take a look at the difference between silica powder and silica powder.
The difference between silicon powder and silicon powder
Silicon powder is a non-toxic, tasteless, non-polluting inorganic non-metallic material. Because of its good temperature resistance, acid and alkali corrosion resistance, high thermal conductivity, high insulation, low expansion, stable chemical properties, high hardness and other excellent properties, it is widely used in chemical industry, electronics, integrated circuits (IC), electrical appliances, plastics, coatings, advanced paints, rubber and other fields. With the rapid development of high-tech fields, silicon powder will also enter a new period of development.
1. Significantly improve the compression resistance, bending resistance, impermeability, corrosion resistance, impact resistance and wear resistance.
2, with water retention, prevent segregation, bleeding, greatly reduce the concrete pumping resistance.
3, significantly extend the service life of concrete.
4, greatly reduce the shotcrete and castable floor ash, improve the thickness of a single spray layer.
5, is a necessary component of high-strength concrete, the engineering application of C150 concrete.
6, with about 5 times the effect of cement, in ordinary concrete and low cement castable application can reduce costs. Increased durability.
7, effectively prevent the occurrence of concrete alkali aggregate reaction.
8. Improve the compactness of pouring refractory materials. When coexisting with Al2O3, it is easier to form mullite phase, which enhances its high temperature strength and thermal vibration resistance.
Microsilica fume is also called silica fume or condensed silica fume. When ferroalloy is smelting ferrosilicon and industrial silicon (metal silicon), a large amount of highly volatile SiO2 and Si gases are produced in the ore thermoelectric furnace. The gases are rapidly oxidized and condensed with air after being discharged.
It is a by-product of large-scale industrial smelting. The whole process needs to be recycled with dust removal and environmental protection equipment. Because the density is small, it also needs to be encrypted with encryption equipment.
1, significantly extend the service life of concrete. Especially in the chloride salt pollution erosion, sulfate erosion, high humidity and other harsh environment, can make the durability of concrete doubled or even several times.
2. It has a strong pozzolanic effect. When mixing concrete, it can have a secondary hydration reaction with cement hydration product Ca(OH)2 to form a cementitious product, fill the cement stone structure, improve the microstructure of the slurry, and improve The mechanical properties and durability of the hardened body.
3. Silica fume is amorphous spherical particles, which can improve the rheological properties of concrete.
4, the average particle size of silica fume is relatively small, has a good filling effect, can be filled in the gap between the cement particles, improve the strength and durability of concrete.
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Kaolin is a non-metallic mineral, which is a kind of clay and clay rock mainly composed of kaolinite clay minerals. Because it is white and delicate, also known as white earth. It is named after Gaoling Village, Jingdezhen, Jiangxi Province.
Barium sulfate is based on barite as the main raw material, through beneficiation, ore washing, crushing and other processes. Barium sulfate has a hardness of 3~3.5 (Mohs) and a specific gravity of 4.3~4.7. It has the characteristics of high specific gravity, low hardness and brittleness. Barite is almost insoluble in water, ethanol and acid, soluble in hot concentrated sulfuric acid. With the development of some high-performance barium sulfate products, the application field of barium sulfate is constantly expanding.