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对三组钢筋混凝土梁在外荷载和服役环境下的耐久性能进行了试验室模拟研究。运用电化学方法对试件中不同涂层钢筋和无涂层钢筋的阻抗进行了测试和等效电路模拟,结合不同试件的裂缝分布,对模拟结果进行了分析。结果表明,环氧涂层能提高钢筋的耐腐蚀性;加载形式不同会对试件钢筋锈蚀产生不同影响;随盐水腐蚀时间的增加,试件中不同厚度涂层钢筋的抗锈蚀能力也有不同程度的退化。
Three groups of reinforced concrete beams in the external load and service life of the laboratory performance of the simulation study. The impedance of different coated steel bars and uncoated steel bars in the test pieces were tested by electrochemical method and the equivalent circuit was simulated. Based on the fracture distribution of different test pieces, the simulation results were analyzed. The results show that the epoxy coating can improve the corrosion resistance of steel bars. Different loading forms have different effects on the corrosion of steel bars. With the increase of corrosion time, the anti-corrosion abilities of steel bars with different thicknesses are also different Degradation.