- May 10, 2017 -
Microsilica can fill the pores between the cement particles, at the same time, production of gel and water and alkaline materials Magnesium Oxide reaction gel.
In the cement based concrete, mortar and refractory castable, with appropriate amount of silica fume, can play the following role:
1, significantly improve the compressive, flexural, anti permeability, anti-corrosion, impact resistance and wear resistance.
2, with water and prevent the segregation, secrete water, greatly reduce the concrete pumping resistance effect.
3, significantly prolong the service life of concrete. Especially in the harsh environment such as chloride pollution, sulfate erosion and high humidity, the durability of concrete can be doubled or even several times.
4, greatly reduce the spray concrete and pouring material ash, improve the thickness of a single layer.
5, is the necessary component of high-strength concrete, C150 concrete engineering application.
6, with about 5 times the effectiveness of cement, in ordinary concrete and low cement castable can reduce the cost of application.
7, effectively prevent the occurrence of concrete alkali aggregate reaction.
8, improve the density of the castable refractory. With Al2O3 coexist, easy to form mullite phase, the high temperature strength, heat shock resistance enhancement.
9, has the strong effect of volcano ash, concrete, and cement hydration products Ca (OH) 2 two hydration reaction, the formation of the gel product, filling cement structure, improve the microstructure of slurry, improve mechanical properties and durability of hardened body.
10, micro silica powder is amorphous spherical particles, can improve the rheological properties of concrete.
11, the average particle size of micro silica powder is relatively small, has a good filling effect, can be filled in the cement particle gap between, improve the strength and durability of concrete.