Bond Properties of Deformed Rebar in Frost-Damaged Recycled Coarse Aggregate Concrete under Repeated Loading
Publication: Journal of Materials in Civil Engineering
Volume 34, Issue 10
Abstract
The bond properties of deformed rebar in frost-damaged recycled coarse aggregate concrete (RAC) under repeated loading (R-L) was studied. It is found that the bond failure modes of specimens for R-L is similar to that for monotonic loading (M-L), whereas the crack width for R-L is larger than that for M-L. The bond strength has a tendency to decrease after frost damage, whereas the peak slip has a tendency to increase, whether under R-L or M-L. The bond strength under R-L is lower than that under M-L, whereas the peak slip under R-L is higher than that under M-L. The experimental results of the pullout specimens in water are contrasted with that in salt solution. Through contrasting research, the frost-damage resistance coefficient and the R-L resistance coefficient in salt solution are lower than that in water, whereas the rebar slip in salt solution is higher than that in water. An ultimate bond strength calculation expression of deformed rebar in frost-damaged RAC under R-L is presented.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The study was carried out with the support of the Key Research and Development Program of Shandong Province (2019 GHY112076); the Natural Science Foundation of Shandong Province (ZR2020ME269); Science and Technology Foundation of Taizhou (201813842002Y); and the Doctoral Science and Technology Startup Foundation of Shandong University of Technology (420048).
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Published In
Journal of Materials in Civil Engineering
Volume 34 • Issue 10 • October 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Apr 21, 2021
Accepted: Jan 27, 2022
Published online: Jul 21, 2022
Published in print: Oct 1, 2022
Discussion open until: Dec 21, 2022
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