TY JOUR TI Study of the resistance of concrete of anisotropic and varitropic structures to alternating wetting and drying KW concrete KW variatropic structure KW anisotropic structure KW wetting and drying cycles KW strength JO Proceedings of Petersburg Transport University AU Mailyan, L.R. AU Stel'makh, S.A. AU Shcherban', E.M. AU Petrushin, A.D. AU Mailyan, A.L. AU El'shaeva, D.M. AU Scherban', N.A. AU Zherebcov, Y.V. PY 2024 IS 21 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"