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Mechanical Properties of Concrete After Chlorine Salt Extraction in Freeze-Thaw Environment

机译：冻融环境中氯盐萃取后混凝土的力学性能

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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.
机译：氯盐侵蚀引起的钢腐蚀会降低钢筋混凝土结构的性能。导致无法使用或需要加强维护结构，产生巨大的经济损失。这个问题的研究也是世界范围内的难题。混凝土的冻融破坏是物理变化的复杂过程。氯盐的侵蚀通常伴随着冷冻和解冻过程。使混凝土结构处于非常恶劣的环境中。根据氯离子来源不同，采用国际通用的电化学法对混凝土试样进行不同的冻融时间后氯离子提取试验方法，研究了氯离子提取，抗压强度，抗渗透性的影响。结论是，冻融后混凝土构件的氯化物萃取，强度和耐久性都有一定的提高，特别是耐久性有很大的提高。另外，提出增加混凝土表皮厚度，优选高性能混凝土的抗氯性，严格控制混凝土原料中氯离子的含量，添加增强型防锈剂和缓蚀剂，采用混凝土防腐层，特种钢，阴极保护等措施，以防止氯盐侵蚀。对于钢筋混凝土水工建筑物中电化学氯化物的提取技术，土木工程在海洋环境中的应用提供了理论基础和推广。

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