Hollow steel pipe and concrete column filled with sea sand concrete and making method thereof

Abstract

A hollow steel pipe and concrete column filled with sea sand concrete comprises a base body (10) made by steel pipes. One outer protective layer (20) of river sand concrete is poured on the outer wall of the base body (10). An inner layer (30) of river sand concrete is poured on the inner wall of the base body (10) by a centrifugation method, and sea sand concrete (40) made by sea sand not desalted is poured into the hollow area circled by the inner layer (30) on site. Sea sand can be directly used for the hollow steel pipe and concrete column without desalination. The concrete column is conveniently built. Sea sand can be effectively utilized, so the problem that coastal areas are lacking in standard sand and stone resources in general is solved, and the exploitation and replenishment of sand and stone materials from remote places are saved. The present invention is favorable for energy saving and ecological environment protection.

Description

technical field [0001] The invention relates to building materials, in particular to an application method of natural sea sand in building components. Background technique [0002] Steel pipe or FRP pipe concrete columns can be used in many industries, such as metallurgical industry, electric power industry, shipbuilding industry, machinery manufacturing industry and industrial or civil buildings, etc. Concrete columns, single-story or multi-story industrial plants, high-rise or super high-rise civil buildings, highways and urban arch bridges and other structures. [0003] For ordinary CFST members, if sea sand is directly applied, the chloride ions in the sea sand will corrode the steel pipe and affect the overall durability of the member. This method limits the direct application of sea sand. For FRP pipe concrete, although the corrosion problem of chloride ions is solved, sea sand can be directly applied, but due to the relatively high brittleness of FRP pipes, it is unf...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for applying sea sand and a method for making a hollow concrete-filled steel tube column with sea-sand concrete pouring. Since the ordinary concrete layer is first poured on the inner wall of the steel pipe, and then the sea-sand concrete is poured in the hollow of the steel tube concrete column, the existing solution is solved. Chloride ions in sea sand will cause technical problems such as corrosion of steel pipes or high brittleness and expansion of concrete

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