Concrete Reinforcement Corrosion Characteristics and Grading Evaluation under Natural Conditions

Abstract:

Abstract: The paper, by using various electrochemical methods, conducts non-destructive quantitative testing towards currently-used bridges, analyzes reinforcement corrosion characteristics under natural environment, concludes the influencing rule of natural environment on reinforcement corrosion, and reveals differences accelerated simulation environment by contrasting with preliminary laboratory results. The real bridge measurement results show that: weight loss ratio of reinforcement under humid environment can reach a maximum of 33% and a minimum of 18%; while weight loss ratio of reinforcement under dry environment falls between 8%-15%. The actual measurement results also show that: box girder and guard bar coated with waterproof layer help to protect reinforcing bars inside the concrete and effectively reduce the corrosion rate inside reinforcing bars with weight loss ratio around 4-8%. It contrasts the precision of two testing methods and comes to a conclusion that testing precision of linear polarization method is higher than that of impulse current method.

• Periodical: Advanced Materials Research (Volumes 1030-1032)
• Pages: 744-749
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1030-1032.744
• Online since: September 2014
• Authors: Bao Hong Hao*, Ding Zeng, Quan Yong Deng, Xi Yang Song, Tin Tin Zhou
• Keywords: Corrosion Rate, Electrochemical Testing, Natural Environment, Non-Destructive Quantitative Testing, Reinforcement Corrosion

References

[1] Ji Yongsheng, Yuan Yingshu, Song Meng et al. Development and Microstructure Analysis of Corrosion Layer of Concrete Reinforcement [J]. Journal of Building Structures, 2009, 37(11): 303-308.

[2] Hao Baohong，Zeng Ding, Li Hang, Cheng Yuxue, Dou Yantao. Model Research of Concrete Reinforcement Corrosion Mechanism and Corrosion Rate under the Corrosion of Chloride ion. Applied Mechanics and Materials [J]. 2013, 470 (2014).

DOI: 10.4028/www.scientific.net/amm.470.847

[3] Baohong Hao , Yantao Dou, Ding Zeng, Qihui Zeng. Linear Polarization Method Research of Quantitative Detection Based on Concrete Reinforcement Corrosion. Applied Mechanics and Materials [J]. 2014, 526 (2014).

DOI: 10.4028/www.scientific.net/amm.526.64

[4] Ding Guoqing, Cai Jianjun, Zhang Bo. Atmospheric Corrosion Characteristics of Steel Bridge Structure [J]. Journal of Highway and Transportation Research and Develoment, 2010, 27(9): 10-19.

[5] He Zhongwen, Zheng Yu, Li Peijun et al. Research of Influence of Environment Friendly Crack Repair Materials on Anti-penetrability Performance of Concrete Members, New Building Materials, 2013, 4(1): 71-73.

[6] Wu Shun. Corrosion Reason and Control Method of Road Bridge Reinforcement [J]. Shanxi Architecture, 2012, 38(27): 190-192.