Experience with silica fume
Speaking of silicon metal, I'm sure many people don't know what it does! Here Anyang Fengfan silicon industry silicon metal industry to tell you about the use of silica fume experience, interested in quickly to understand the next:
During the whole process of the application of silica fume, we have accumulated rich experience on how to best use silica fume. The following is some summary of the application and research personnel:
Silica fume is not suitable for all occasions. It is necessary for those drawing up concrete skill requirements to carefully analyze specific applications and acknowledge that the use of silica fume can yield top results.
It is necessary to use silica fume in concrete with suitable composition (cooperation ratio), which should be low water-binder ratio (W /cm) and concrete with high efficiency water reducing agent. The preliminary study found that in the concrete cooperation ratio of silica fume, the water-binder ratio is 0.6 or higher, which is unreasonable.
The combined application of silica fume and other auxiliary cementitious materials is increasing. At first, these data were viewed as competing data, but it is now increasingly recognized that the best concrete is often the result of combining these data.
The amount of silica fume used per unit volume of concrete is decreasing, especially when exposed to chlorine salts. The bridge deck concrete initially contained 12 to 15 percent metallic silica fume (by weight of cement), and over the next few years the silica fume content dropped to about 8 percent. At present, if combined with fly ash or ground slag, the silica fume content is reduced to about 5%.
There is no empirical approach to collaborative planning and functional prediction for silica fume concrete, but reference can be made to existing guidelines and examples of collaborative planning. It is necessary to carry out laboratory and field experiments with engineering practical application data to determine the final cooperation ratio.
