Modified high-strength concrete with the addition of CONPLAST SP430 Baxauatdin Kalbaev, Gulzar Utegenova, A. Ilyasov and Mikhail Gandjuntsev E3S Web Conf., 263 (2021) 01004 Published online: 28 May 2021 DOI: 10.1051/e3sconf/202126301004