Study on the Durability of Concrete under an Underwater Coupling Environment

Table 3

Mix proportion design index of the cast-in-place concrete pile.

Strength grade	Slump (m)	Air content (%)	Water-cement ratio	Fly ash content (%)	Mineral powder content (%)	Amount of rubber material (%)	Admixture	28 d chloride diffusion system (m^2/s)	Corrosion resistance coefficient of compressive strength
C50	200~220	3.0~3.6	0.32~0.34	15~20	30~40	≥360	Preservative and rust inhibitor	–12	≥0.90