基于恒电流密度的钢筋混凝土加速腐蚀试验研究

doi:10.11896/cldb.19090030

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Abstract In order to solve the problem of corrosion of reinforced concrete in saline soil environment, constant current accelerated corrosion test was carried out with current density of 182 μA/cm²,364 μA/cm² and 546 μA/cm². The corrosive properties of reinforced concrete were studied by polarization curve method (LPR), Cl^- content analysis, EDS, etc. and the Copula function damage model and Cl^- diffusion model were established. The research shows that the eutectic accelerated current corrosion efficiency of reinforced concrete is 364 μA/cm²,546 μA/cm²,182 μA/cm² from high to low in the wet saline soil environment, and the constant current acceleration (no crack), The diffusion coefficient of Cl^- is 1.115×10^-12 m²/s. In the later stage (cracks appear), the larger the initial crack, the faster the reinforced concrete damage; the convective concrete constant current accelerated life value of 182 μA/cm²,364 μA/cm² and 546 μA/cm² are 700 h,350 h,175 h.

Key words： polarization curve (LPR) constant current accelerated corrosion saline soil environment Cl^- diffusion model Copula function damage model

Published: 02 December 2020

CLC number:

TU528

Fund:This work was financially supported by the National Natural Science Foundation of China(51868044,51468039),Hongliu First-class Discipline Construction Program of Lanzhou.

About author:: Minggang Shang, now a master's degree student in the school of civil engineering, Lanzhou University of technology, is engaged in the durability research of reinforced concrete under the guidance of Professor Zhongmao He and Professor Hongxia Qiao.Zhongmao He, born in 1965 in Zhenjiang, Jiangsu Province, is a member of the Communist Party of China, doctor of engineering, professor level senior engineer, doctoral supervisor, director of China Nonferrous Metals Society, expert member of Expert Committee of China Construction Association, etc. It is mainly engaged in civil engineering materials, durability of concrete structure, comprehensive utilization of industrial waste, theory and method of concrete winter construction, mechanism of sick concrete and repair technology, etc. It has won 3 second prizes, 1 third prize, 2 second prizes of Gansu Province Science and technology progress, and 1 second prize of China University Science and technology progress award. He was awarded the titles of "advanced individual of national construction technology progress", "model worker of national nonferrous metal industry" and "expert enjoying special government allowance of the State Council".

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	SHANG Minggang
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	QIAO Hongxia
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	SU Fuyun
	ZHANG Lu

Cite this article:

SHANG Minggang,HE Zhongmao,QIAO Hongxia, et al. Experimental Research on Accelerated Corrosion of Reinforced Concrete Based on Constant Current Density[J]. Materials Reports, 2020, 34(22): 22058-22064.

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http://www.mater-rep.com/EN/10.11896/cldb.19090030 OR http://www.mater-rep.com/EN/Y2020/V34/I22/22058

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