The authors regret the omission of the two references listed below. After publication of their paper in Structures (the first paper), the co-authors became aware of a thesis that the first author wrote prior to commencing his PhD at the University of Western Australia. At the same time, they became aware of a second paper that the first author prepared with his collaborators and submitted to Construction and Building Materials (the second paper). The second paper was revised and accepted on 17 April 2018 and 21 April 2018, respectively, after the first paper was published in Structures on 28 March 2018. The authors believe that the thesis and the second paper should have been acknowledged for completeness as shown below. The authors would like to apologise for any inconvenience caused. Introduction. As discussed by Eftekhari , CNT-reinforced concrete can exhibit favorable mechanical properties provided that the CNT fibers and the concrete precursors are mixed adequately. This paper discusses the hierarchical multi-scaling to predict the mechanical properties of CNT-reinforced concrete using numerical modelling. Eftekhari et al.  investigated the experimental behavior of CNT-reinforced concrete in light of numerical modelling using molecular dynamics and finite element analysis.