Bond Performance of Corroded Steel Reinforcement and Recycled Coarse Aggregate Concrete after Freeze–Thaw Cycles

Xutong Huang, Tian Su, Jinxu Wang, Fubo Cao () and Chenxia Wang ()
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Xutong Huang: School of Civil Engineering, Inner Mongolia University of Science & Technology, Baotou 014017, China
Tian Su: School of Civil and Architectural Engineering, Shandong University of Technology, Zibo 255000, China
Jinxu Wang: School of Civil Engineering, Inner Mongolia University of Science & Technology, Baotou 014017, China
Fubo Cao: School of Civil Engineering, Inner Mongolia University of Science & Technology, Baotou 014017, China
Chenxia Wang: School of Civil Engineering, Inner Mongolia University of Science & Technology, Baotou 014017, China

Sustainability, 2023, vol. 15, issue 7, 1-23

Abstract: Freeze–thaw cycles and steel reinforcement corrosion can damage the properties of concrete structures in a frigid marine environment. In this paper, experimental and analytical research on the freeze–thaw resistance of recycled coarse aggregate concrete (RAC) and the bond performance of corroded steel reinforcement and RAC after freeze–thaw cycles was conducted. The results showed that the ultimate bond strength decreases with increasing freeze–thaw cycles and steel reinforcement corrosion rates, and the bond strength decreases more rapidly under the coupled effect of freeze–thaw cycles and steel reinforcement corrosion. Additionally, the quantitative analysis of the relationships between the ultimate bond strength and different freeze–thaw cycles and steel reinforcement corrosion rates was conducted through the relativity analysis, and analysis results revealed that freeze–thaw cycles have a more pronounced effect on the ultimate bond strength than steel reinforcement corrosion. A modified bond–slip prediction model of corroded steel reinforcement and RAC after freeze–thaw cycles was established, and the model exhibited better agreement with the test data of this and other research, demonstrating its rationality and applicability. These research results can provide experimental and analytical support for freeze–thaw-resistant design and bond performance prediction of RAC structures in a frigid marine environment.

Keywords: recycled coarse aggregate concrete; steel reinforcement corrosion; freeze–thaw cycles; bond performance; modified bond–slip prediction model (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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