Retraction: Zhang Q, Afzal M. Prediction of the elastic modulus of recycled aggregate concrete applying hybrid artificial intelligence and machine learning algorithms. Structural Concrete. 2022; 23: 2477–2495. https://doi.org/10.1002/suco.202100250.

The above article, published online on 15 November 2021 in Wiley Online Library {https://onlinelibrary.wiley.com/doi/10.1002/suco.202100250} has been retracted by agreement between the journal's Editor‐in‐Chief, Professor Luc Taerwe, the fib, and John Wiley & Sons Ltd. The retraction has been agreed given the journal has received evidence confirming that the peer review process of this paper was manipulated. As a result, the conclusions reported in the article are not considered reliable. [ABSTRACT FROM AUTHOR]