Field Corrosion Test of Concrete in Salt Swamp Environment in Qinghai

FENG Zhong-ju; CHEN Lu; KONG Yuan-yuan; WANG Fu-chun; CHEN Hui-yun; ZHANG Cong

doi:10.11988/ckyyb.20211258

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Journal of Changjiang River Scientific Research Institute ›› 2023, Vol. 40 ›› Issue (5) : 166-172. DOI: 10.11988/ckyyb.20211258

Hydraulic Structure and Material

Field Corrosion Test of Concrete in Salt Swamp Environment in Qinghai

FENG Zhong-ju, CHEN Lu, KONG Yuan-yuan, WANG Fu-chun, CHEN Hui-yun, ZHANG Cong

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Abstract

Field corrosion tests were conducted in salt swamp environments in Qinghai Province to investigate the corrosion of concrete in the region. The microstructure of concrete was observed under different burial conditions, and the durability of concrete was evaluated by assessing the mass loss, changes in anti-corrosion coefficient, and changes in corrosion rate of steel bars. Results indicate that changes in the mass of concrete can not be used as an evaluation index to describe concrete damage. Embedded in the ground or water, concrete mixed with cement-based materials exhibits the highest corrosion resistance coefficient, while concrete mixed with fly ash-silica fume has the highest corrosion resistance when buried at a depth of 1.25 m. Concrete deterioration results from multiple factors such as expansion force, freezing stress, and crystallization stress. The corrosion rate of concrete embedded in the ground, particularly reinforced concrete mixed merely with cement base, is the highest. The corrosion rate of concrete with fly ash-cement base is the lowest.

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concrete / durability / salt swamp / corrosion test

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FENG Zhong-ju, CHEN Lu, KONG Yuan-yuan, WANG Fu-chun, CHEN Hui-yun, ZHANG Cong. Field Corrosion Test of Concrete in Salt Swamp Environment in Qinghai[J]. Journal of Changjiang River Scientific Research Institute. 2023, 40(5): 166-172 https://doi.org/10.11988/ckyyb.20211258

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