Improving properties of portland cement using new types of composite additivesM.I. Iskandarova, F.B. Atabaev, Z.B. Yakubzhanova, G.B. Begjanova, N.A. Mironyuk and D.U. AxmedovaE3S Web of Conf., 365 (2023) 02013DOI: https://doi.org/10.1051/e3sconf/202336502013