Mechanical Properties and Design of Concrete with Hybrid Steel and Basalt Fiber Leonid Dvorkin, Oleh Bordiuzhenko, Vadim Zhitkovsky, Svyatoslav Gomon and Sviatoslav Homon E3S Web Conf., 264 (2021) 02030 Published online: 02 June 2021 DOI: 10.1051/e3sconf/202126402030