A Study on Axial Compression Performance of Large Diameter-Thickness Ratio Concrete-Filled Gas Drainage Steel Pipe

Figure 6

Characteristics of concrete-filled steel pipe interface with three cross section forms. Concrete raw materials are as follows: PO42.5 cement, natural river sand, 10 mm stone, HQ liquid alkali-free accelerator, Sulfate-based early strength agent, water. (a) SSP-I; (b) SSP-II; (c) RSP.

(a)

(b)

(c)