Abstract
Steel corrosion caused by chlorine salt erosion, degrade performance of reinforced concrete structures. Lead to can't use or need to reinforce the maintenance structure, produce the huge economic losses. The research of this subject is also a worldwide difficult problem. The freeze-thaw damage of concrete is a complex process of physical change. The chlorine salt erosion is often accompanied by freezing and thawing process. Make concrete structure is in a very bad environment. According to different sources of chloride ion and adopt general international electrochemical chloride extraction testing method of concrete specimens after different freezing and thawing times, the effect of chloride extraction, compressive strength, permeability resistance are studied. It is concluded that the chloride extraction, the strength and durability of the concrete member after freezing and thawing has had certain improvement, especially the durability has a lot to improve. In addition, put forward to increase thickness of concrete cover, preferable high-performance concrete resistance to chloride, strictly control the content of chlorine ion in concrete raw materials, adding reinforcement rust and corrosion inhibitor, adopting concrete corrosion layer, special steel, cathodic protection and so on measures to prevent the chlorine salt erosion. For electrochemical chloride extraction technique in reinforced concrete hydraulic structure, the application of civil engineering in the marine environment which it is provided the theoretical foundation and promotion.
Highlights
In recent years, our country's infrastructure is continuous high-speed growth
The world's biggest civil engineering construction it is in China
If not in-depth research and discussion, is bound to the civil engineering disasters caused by lack of concrete durability of serious, leading to the country's huge economic burden and pressure
Summary
Our country's infrastructure is continuous high-speed growth. The size of the infrastructure is growing. The case of civil structure instability due to reinforced concrete durability deterioration is so many. The external cause includes friction, erosion, environment temperature, fatigue stress, fracture weathering, load, etc. According to these factors, the various countries' scholars conducted a lot of scientific research. The chlorine salt erosion caused by the concrete structure durability degradation is important and difficult issues of common concern to civil engineering. If not in-depth research and discussion, is bound to the civil engineering disasters caused by lack of concrete durability of serious, leading to the country's huge economic burden and pressure
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