Study on Corrosion Deterioration of Reinforced Concrete Under Constant Acceleration Test Based on Double Stress
SHANG Minggang1, ZHANG Yunsheng1, HE Zhongmao1,2, QIAO Hongxia1, FENG Qiong1, XUE Cuizhen1, HAN Zhao1
1 School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China 2 College of Science & Technology Ningbo University, Ningbo 315211, Zhejiang, China
Abstract: In view of the characteristics of long durability test period and large data dispersion of reinforced concrete, high corrosive saline soil was selec-ted as conductive medium to design constant accelerated corrosion test. In this work, the deterioration process of the one-dimensional and the three-dimensional reinforced concrete specimens under double stress of constant current and corrosive ions was simulated. Electrochemical impedance spectroscopy (AC impedance) data, chloride ion content data, and microscopic and macroscopic morphology data were collected during the accelerated test. Meanwhile, a statistical model of corrosion degradation in constant acceleration test based on lognormal distribution was established. The results have shown that the paraffin protective layer can increase the average life of reinforced concrete under chloride stress, constant current stress, and double stress by 249 h, 268 h and 115 h, respectively.The constant current stress firstly acts on the reinforced concrete, and the appearance of penetrating crack accelerates the corrosion effect of chloride ion stress. Finally, the double stress superposition increases the corrosion deterioration rate of reinforced concrete. The deterioration model of constant addition test based on lognormal distribution can realize the quantitative analysis of the protective effect of paraffin, and the influence factors of paraffin under chloride ion, constant current and double stress are 0.41, 0.35 and 0.19, respectively.
作者简介: 尚明刚,现为兰州理工大学土木工程学院博士研究生,从事钢筋混凝土耐久性、城市生活垃圾焚烧尾渣资源化利用的研究。 张云升,博士研究生导师,长江学者特聘教授。2004年毕业于东南大学,获工学博士学位;2003年1月—2004年1月在香港科技大学土木系进行访学;2010年任东南大学教授、博士生导师;2013年12月—2014年12月在美国加州伯克利大学土木工程与环境系进行访学。发表学术论文200余篇,其中SCI/EI收录140余篇;出版学术专著3部;获授权发明专利20余项;先后获国家科技进步二等奖2项、省部级一等奖1项、二等奖1项。现任江苏省现代混凝土耐久性评估与提升工程中心副主任、城市与建筑遗产保护教育部重点实验室副主任。担任国际期刊Journal of Research Update in Polymer Science、Frontiers of Architectural Research编委、国内期刊《土木工程》副主编、国内期刊《材料导报》编委、亚洲混凝土学会(ACF)-建造和材料部主席、美国混凝土学会(ACI)委员、欧洲材料与结构联合会委员、中国硅酸盐学会固废分会理事、江苏省硅酸盐学会副理事长、新型道路材料国家地方联合工程实验室学术委员会委员、中国土木工程学会纤维混凝土专业委员会委员、中国土木工程学会混高强与高性能混凝土专业委会委员、中国建筑学会混凝土基本理论及其应用专业委员会委员。主要研究领域包括超高性能混凝土与强动载响应、严酷环境下结构混凝土耐久性、绿色低碳建筑材料。
引用本文:
尚明刚, 张云升, 何忠茂, 乔宏霞, 冯琼, 薛翠真, 韩照. 基于双应力的钢筋混凝土恒加试验腐蚀劣化规律研究[J]. 材料导报, 2022, 36(11): 21030289-8.
SHANG Minggang, ZHANG Yunsheng, HE Zhongmao, QIAO Hongxia, FENG Qiong, XUE Cuizhen, HAN Zhao. Study on Corrosion Deterioration of Reinforced Concrete Under Constant Acceleration Test Based on Double Stress. Materials Reports, 2022, 36(11): 21030289-8.
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