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An Experimental Study on Constant Current Load Test of Reinforced Concrete based on 3D Paraffin Isolation

Journal of Wuhan University of Technology(Materials Science) 2023年第2期38卷 353-365页

作者： SHANG Minggang XUE Cuizhen ZHANG Yunsheng HEZhongmao QIAO Honzxin PENG Qiong Theogene Hakuzweyezu HAN Zhao School of Civil Engineering Lanzhou University of TechnologyLanzhou730050China Gansu Advanced Civil Engineering Materials Engineering Research Center Lanzhou730050China College of Science&Technology Ningbo University Ningbo315211China Institute of Rock and Soil Mechanics Chinese Academy of SciencesWuhan430071China

Aiming at the complex corrosion degradation factors of reinforced concrete and clearing the deterioration mechanism in the constant stress state,a new type of constant current accelerated corrosion method in the saline soil environment was *** three-dimensional paraffin isolation specimens and the three-dimensional penetration specimens were taken as the research objects,and the Cl−content and AC impedance Bode diagram were *** macro morphology and micro analysis were also used to evaluate the corrosion degradation laws of the two groups of specimens.A constant current three-factor system accelerated model was established for the current acceleration factor,chloride ion,and sulfate ion acceleration *** experimental results show that,in the constant stress test of the saline soil environmental conditions,the paraffin isolation layer can effectively isolate corrosive chloride ions,which is a brand-new research method of single factor variable control in the constant stress *** to the basic corrosion data,the law of constant current acceleration test is summarized and divided into five corrosion degradation stages,and each stage has significant changes in the accelerated corrosion *** corrosion degradation of a constant stress test is the combined effect of constant current,positive and negative penetration of chloride ions and sulfate ions.

关键词： Cl−content AC impedance constant stress test acceleration factor full factor life cycle

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