Abstract: Cracks are the main causes for the reduction of bearing capacity and durability of concrete structures. In order to study the corrosion behavior and influence of crack width, reinforced concrete specimens with different crack parameters were placed in Wheat Island tidal zone for 700 d. Moreover, the corrosion behavior of steel bars were investigated by electrochemical impedance spectroscopy, as well as fitting and calculating the corrosion current density and corrosion rate. And the depassivation time was calculated by linear fitting of the polarization resistance. The results show that: When the crack width is less than 0.15 mm, the steel bars will not be affected by the crack width while concrete with small crack has a certain self-healing ability. When the crack width exceeds 0.15 mm, the corrosion rate of the steel bar accelerates with the increase of the concrete crack width. Compared to concrete specimens with single crack, the concrete specimens with double cracks are more likely to corrode. The concrete specimen with longitudinal crack is more susceptible to corrosion compared with that of transverse crack while the crack width is same.
作者简介: 冯光岩,2017年6月毕业于山东农业大学,获得工学学士学位。现为青岛理工大学土木工程学院硕士研究生,在金祖权教授的指导下进行研究。目前主要研究领域为海洋环境混凝土结构耐久性。 金祖权,青岛理工大学土木工程学院教授,博士研究生导师,国家“万人计划”领军人才,英国University College London访问学者。2006年6月毕业于东南大学,获得工学博士学位。2009—2011年在中科院海洋研究所从事博士后研究工作。主要从事海洋环境钢筋混凝土腐蚀与防护研究。
引用本文:
冯光岩, 金祖权, 熊传胜, 范君峰. 海洋潮汐区暴露700 d带裂缝混凝土中耐蚀钢筋的锈蚀行为[J]. 材料导报, 2020, 34(8): 8064-8070.
FENG Guangyan, JIN Zuquan, XIONG Chuansheng, FAN Junfeng. Corrosion Behavior of Corrosion-resistant Steel in Cracked Concrete Exposed to Marine Tidal Area for 700 Days. Materials Reports, 2020, 34(8): 8064-8070.
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2020, Vol. 34 
