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结合理论分析、数值模拟和模型试验数据,分析了温度和相对湿度对混凝土中钢筋腐蚀控制模式及速率的影响规律.首先基于混凝土中钢筋腐蚀的电化学原理,并考虑电极反应的逆向反应速率对活化极化过电位的影响,改进了传统钢筋腐蚀宏电池模型中的阳极腐蚀电位;然后分析了温度和相对湿度对平衡电位、交换电流密度、极限电流密度等参数的影响,建立了能够有效考虑温度和相对湿度影响的钢筋腐蚀宏电池模型;最后利用人工和自然气候环境下的试验数据,对比验证了所建模型的有效性,并分析了温度和相对湿度对混凝土中钢筋腐蚀控制模式及速率的影响规律.
Based on the theoretical analysis, numerical simulation and model test data, the influence of temperature and relative humidity on corrosion control mode and rate of rebar in concrete are analyzed.Firstly, based on the electrochemical principle of rebar corrosion in concrete and taking into account of the reaction rate of electrode reaction The influence of temperature and relative humidity on the equilibrium potential, the exchange current density and the limiting current density were analyzed. The influence of temperature and relative humidity on the parameters such as the equilibrium potential, the exchange current density and the limiting current density were analyzed. Temperature and relative humidity of the steel reinforced macro cell model; Finally, the use of artificial and natural climatic conditions of the experimental data, validated the validity of the model built, and analyzed the temperature and relative humidity of concrete corrosion control mode and rate The law of influence.