TY JOUR TI INVESTIGATION OF PHYSICO-MECHANICAL PROPERTIES OF COARSE-PORED EXPANDED CLAY CONCRETE FOR THREE-LAYER 3D ADDITIVE CONSTRUCTIO KW 3D additive technologies KW multilayer synthesis KW expanded clay concrete KW 3D printing KW water absorption JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Sheremet, A.A. AU Elistratkin, M.Y. AU Sheremet, E.O. AU Lesovik, V.S. AU Shatalova, S.V. PY 2022 IS 7 PB Belgorod State Technological University named after V.G. Shukhov