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为了研究碳化混凝土板内钢筋腐蚀程度对电化学再碱化处理效果的影响,对一组钢筋轻度腐蚀和另一组钢筋重度腐蚀的碳化混凝土板进行外加电源式再碱化处理,并用粉样pH值测试法和多种电化学技术(自由电势,线性极化电阻技术,电化学阻抗技术)评估处理效果.跟踪混凝土酸碱度以及钢筋腐蚀程度效果1 a的结果显示:无论处理前钢筋的腐蚀程度如何,再碱化处理技术能够有效地将混凝土的pH提高到10.5,钢筋腐蚀速率降低到10μm/a.但是,重度腐蚀钢筋在处理后的腐蚀活性降低量更为明显.
In order to study the effect of corrosion degree of rebar in carbonized concrete slab on the effect of electrochemical alkalizing treatment, a group of carbonized concrete slabs with slight corrosion of rebar and severe corrosion of another group of rebar were subjected to external power supply alkalizing treatment. pH value test method and a variety of electrochemical techniques (free potential, linear polarization resistance technology, electrochemical impedance technology) to assess the treatment effect.Characteristics of the concrete to track the corrosion and corrosion effects 1 a results showed that: regardless of the degree of corrosion of steel before treatment How, the re-alkalization technology can effectively increase the pH of concrete to 10.5, and the corrosion rate of steel reinforcement to 10μm / a. However, the corrosion reduction of heavy corrosion steel is more obvious after treatment.