This is a postprint version of the following published document: Iorio, M., Santarelli, M. L., González-Gaitano, G., & González-Benito, J. (2018). Surface modification and characterization of basalt fibers as potential reinforcement of concretes. Applied Surface Science, 427, 1248-1256. doi:https://doi.org/10.1016/j.apsusc.2017.08.196 © 2017 Elsevier B.V. This work is licensed under a Creative Commons Attribution- NonCommercialNoDerivatives 4.0 International License.