TY JOUR TI SELECTION OF A RATIONAL RECIPE OF LIGHTWEIGHT CONCRETE ON A MIXTURE OF CERAMSITE GRAVEL, NATURAL CRUSHED STONE AND GRANULAR SLAG KW lightweight concrete KW structural quality factor KW density KW strength KW volumetric content KW dense aggregate KW porous aggregate JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Chernil'nik, A.A. AU El'shaeva, D.M. AU Zherebtsov, Y.V. AU Dotsenko, N.A. AU Samofalova, M.S. PY 2021 IS 6 PB Belgorod State Technological University named after V.G. Shukhov