Hybrid steel fiber self-compacting concrete mix proportion secondary design method based on solid phase surface filling layer customization

The invention discloses a hybrid steel fiber self-compacting concrete mix proportion secondary design method based on solid-phase surface filling layer customization, which comprises the following steps: introducing steel fibers on the basis of the basic mix proportion of fiber-free self-compacting concrete, and carrying out secondary mix proportion design through a secondary design envelope curve; and finally obtaining the final mix proportion of the steel fiber self-compacting concrete. According to the design method, the variability of materials with different fiber diameters, aggregate systems and the like can be included, the fibers can be mixed and doped, the working performance fluctuation of a mixture caused by the material and fiber mixing amount is reduced, the stability is greatly improved, the working performance control of freshly-mixed self-compacting concrete is optimized, the matching and debugging quantity is greatly reduced, and the production cost is reduced. The rapid blending of the self-