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

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...

AI Technical Summary

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.

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