How much silica fume to add to concrete?

How much silica fume to add to concrete?

Blogs, Cement Concrete
Because of construction materials, micro silica fume (silica fume) can fill the pores between cement and concrete particles, and form gel with hydration products, and react with basic material magnesium oxide to form gel. It can greatly improve the strength and density of concrete, and is widely used in refractory,…
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