Injection molded steel-tube sea sand recycled concrete column with built-in stiffening member

Abstract

The invention relates to an injection molded steel-tube sea sand recycled concrete column with a built-in stiffening member. The injection molded steel-tube sea sand recycled concrete column comprises an injection molded steel tube which is filled with sea sand recycled concrete. Two ends of the injection molded steel tube are respectively provided with an end cover. A FRP section steel stiffening member is also arranged inside the sea sand recycled concrete. The internal surface of the injection molded steel tube has good elastoplasticity and strength as well as corrosion resistance. According to the invention, sea sand is directly applied in the recycled concrete of the injection molded steel tube, and it is unnecessary to process sea sand. The sea sand recycled concrete is poured into the injection molded steel tube to form the injection molded steel-tube recycled concrete column, and then two ends of the injection molded steel tube are sealed by the use of seal covers with plastic washers. The injection molded steel tube provides tightening force for the recycled concrete such that sea sand and the recycled concrete are tightly combined. In addition, as a corrosion resistant layer inside the injection molded steel tube has good elastoplasticity and strength and has fracture resistance and compressive strength 3.5 times higher than a common steel tube, the corrosion resistant layer can play a role in corrosion prevention and isolation and can be used to make the injection molded steel tube and the recycled concrete to be more tightly combined. Thus, the injection molded steel-tube sea sand recycled concrete column has better functional effects.

Description

technical field [0001] The invention relates to a sea sand recycled concrete column with a built-in reinforcement member in an injection-molded steel pipe, in particular to a sea sand regeneration with a built-in reinforcement member of an injection-molded steel pipe with a built-in FRP I-shaped steel and its optimized reinforcing rib and untreated sea sand recycled concrete. Concrete columns. Background technique [0002] my country's industrialization and its construction manufacturing industry are still in a development stage of extensive raw resources and energy consumption. The construction process requires a lot of river sand and also produces a lot of construction waste. How to use waste concrete to improve its strength? , making the use of renewable resources, replacing river sand with sea sand, and mass-manufacturing industrialized building components have always been the focus of people's research. Steel tube recycled concrete columns have broad application prospect...

AI Technical Summary

Problems solved by technology

Although this method can directly use sea sand, special FRP is used as the isolation layer to increase the cost. However, in the solution of using river sand isolation, both ends of the steel pipe need to be filled with high-quality river sand concrete, and skilled workers need to use welding. machine and weld both ends of the steel cover, the various manufacturing processes are complicated, and the quality is difficult to control

If the operation is improper, a small amount of sea and river sand will be mixed together, which will cause corrosion to the steel pipe, and the strength of this scheme is not high.

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