Properties of concrete containing high-calcium fly ash artificial aggregate Y. G. Barabanshchikov, K. Y. Usanova, Sukhrob Umarov and Mirsoxibjon Salimbayev E3S Web of Conf., 401 (2023) 03016 Published online: 11 July 2023 DOI: 10.1051/e3sconf/202340103016