The basic requirements for high-performance silica fume concrete

1. High-performance silica fume concrete has high fluidity, good cohesion, no segregation, no delamination, and excellent construction performance.

2. The hardened concrete has high strength. Because strength is the basic performance of concrete, the ordinary concrete with low strength can not be regarded as high-performance concrete. But this does not mean that the ordinary concrete: concrete should have good workability and sufficient durability performance.

3. The hardened wonton concrete has good volume stability, that is, small shrinkage and low creep:

4. High durability. It is not because of a certain good performance, the concrete that meets a certain functional requirement of the project is called high-performance concrete, otherwise, the high-performance concrete covers too wide, and the significance of high-performance concrete is lost.

5. High strength, low water-cement ratio and low water consumption; On the contrary, high fluidity requires too much water consumption and a high water-cement ratio. In the mix ratio design of ordinary concrete, the main work is to balance these two requirements, so as to achieve the requirement of both meeting the strength and the need of fluidity.

Therefore, it is necessary to make high-performance concrete that meets the above requirements. It is also necessary to adopt other advanced technological measures, and mix high-efficiency superplasticizers and high-efficiency active mineral additives.