TY JOUR TI BINDING COMPOSITIONS USING VERMICULITE FOR HEAT PROTECTIVE SOLUTIONS KW expanded vermiculite KW binder composition KW heat protection solutions KW Portland cement KW low density KW microstructure JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Al Mamouri, S.K. AU Zagorodnyuk, L.H. AU Sumskoy, D.A. AU Bocharnikov, A.L. AU Shemetova, O.M. PY 2023 IS 8 PB Belgorod State Technological University named after V.G. Shukhov