Low-shrinkage ultra-high-strength concrete-reinforced concrete combined structure and construction method thereof

A technology of ultra-high-strength concrete and reinforced concrete, which is applied in building components, building structures, building insulation materials, etc., can solve the problems of steel corrosion, accelerated corrosion, reduction of concrete bond strength, etc., and achieve excellent chlorine resistance. Ion permeability, simple structure, effect of retarding corrosion damage

Pending Publication Date: 2019-11-19
FUZHOU UNIV
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  • Abstract
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Problems solved by technology

However, galvanized steel bars are prone to corrosion under chloride ion corrosion, and the inhibition effect after corrosion is not ideal
Fusion-bonded epoxy coating is the most used non-metallic coating. Epoxy coated steel bars have good corrosion resistance, but the bonding strength with concrete is significantly reduced, and the coating should not have too many micropores and cracks, otherwise corrosion will be accelerated
Based on the above, it can be seen that up to now, many scholars at home and abroad have done a lot of research work on the corrosion of structural steel bars, but they have not completely solved the corrosion problem of steel bars.

Method used

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  • Low-shrinkage ultra-high-strength concrete-reinforced concrete combined structure and construction method thereof
  • Low-shrinkage ultra-high-strength concrete-reinforced concrete combined structure and construction method thereof

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Embodiment Construction

[0014] In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

[0015] Such as Figure 1~2 As shown, a low-shrinkage ultra-high-strength concrete-reinforced concrete composite structure includes a reinforced concrete layer 1, and a low-shrinkage ultra-high-strength concrete protective layer 2 is poured on one or both sides of the reinforced concrete layer. Compared with ordinary concrete, ultra-high-strength concrete has excellent resistance to chloride ion penetration, and its chloride ion permeability coefficient is two orders of magnitude lower than ordinary concrete. Using ultra-high-strength concrete as the protective layer of reinforced concrete can significantly improve the chloride ion penetration resistance of reinforced concrete and greatly slow down the corrosion damage of steel bars.

[0016] In the embodiment ...

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Abstract

The invention relates to a low-shrinkage ultra-high-strength concrete-reinforced concrete combined structure which comprises a reinforced concrete layer, wherein low-shrinkage ultra-high-strength concrete protection layers are cast on the single side or the double sides of the reinforced concrete layer. The low-shrinkage ultra-high-strength concrete-reinforced concrete combined structure has the advantages that the structure is simple; the corrosion damage of steel bars is effectively delayed; and interface cracks caused by inconsistent shrinkage of the ultra-high-strength concrete protectionlayers and the reinforced concrete layer can be inhibited.

Description

technical field [0001] The invention relates to a low-shrinkage ultra-high-strength concrete-reinforced concrete composite structure and a construction method thereof. Background technique [0002] At present, there are many types of corrosion protection measures for steel bars in concrete, such as concrete surface protection, rust inhibitors, electrochemical cathodic protection of steel bars, and steel bar surface coating. There are many kinds of concrete surface protective coatings, which have excellent anti-corrosion properties, but their disadvantages are that they are not adaptable, and there are many volatile organic compounds, which pose a serious threat to the ecological environment. Environmental protection, high performance, and functionalization are the development of concrete anti-corrosion coatings. focus direction. Steel bar rust inhibitors can prevent or slow down steel bar corrosion. At present, sodium nitrite, sodium benzoate and other types are mainly used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/00E04B1/64
CPCE04B1/00E04B1/642
Inventor 王德辉罗素蓉王雪芳吴文达
Owner FUZHOU UNIV
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