What Is The Specific Dosage Of Micro Silica Fume (Silica Fume) In Concrete?

The specific dosage of silica fume in concrete is generally 5% to 10% of the total cementitious material.

When used in high-strength concrete, the dosage can be increased, but should not normally exceed 15%. If the dosage is too much, it may lead to an increase in the water demand of the concrete, deteriorate the workability, and even affect the late strength development and durability of the concrete.

In normal strength concrete, the dosage can be relatively reduced, generally around 5% to 8%.

In practical application, it should be adjusted according to the design requirements of concrete, construction conditions and the quality of micro silica powder and other factors, and the optimal dosage should be determined through tests.