Several Categories Of Silica Fume

Several categories of silica fume

The use of micro-silica fume in recent years marks that my country's construction industry and ceramic refractory production have entered a high-tech period. The many advantages of micro-silica fume make it popular in the construction industry. Microsilica fume can be used in cement, concrete, mortar, highway, railway, high-speed rail, floor, bridge, wharf laneway, fireproof board, refractory factory and other places.

Microsilica fume can be well filled in the cement void after infiltrated into cement concrete, making the slurry more dense. In addition, it combines with free Ca(OH) to form a stable calcium silicate hydrate 2CaO.SiO2.H2O , the hydrate gel strength is higher than that of Ca(OH) crystals.

To use micro-silica fume, it is necessary to understand the indicators of micro-silica fume.

First: Content: Most of the silica fume currently on the market contains 85%-97%. The effect of micro-silica fume with lower content is not very good. Micro-silica fume with a content of 85%-97% is currently a hot product in the market.

Second: Density: The density of micro-silica fume is generally 200. The freight is relatively high, and it is generally unencrypted micro-silicon fume. The micro-silica fume with a density of about 600 is a heavy-density type, which is convenient for transportation and suitable for export.

Third: Type: Micro-silicon fume has three types: non-encrypted, re-encrypted, and semi-encrypted. Unencrypted micro-silica fume, due to its light weight, the freight will be high, so be careful when purchasing, and consider its cost. Heavy-density silica fume is suitable for export and is convenient for long-distance transportation. Semi-encrypted micro-silica fume is relatively cost-effective of the first two. In fact, it is the same to encrypt or not to encrypt micro-silicon fume.

Fourth: fluidity: the fluidity of silica fume affects its effect. The higher the fluidity, the better the effect, on the contrary, the lower the fluidity, the less effective.

Fifth: Color: The color of silica fume is black, white, gray, off-white, cyan and so on. Microsilica fume with high content looks fine, while microsilica fume with low content looks large and rough.