TY JOUR TI INFLUENCE OF CHRYSOTILE-ASBESTOS MICROREINFORCEMENT OF DIFFERENT MIXES ON THE PROPERTIES AND STRUCTURE OF FOAMS KW chrysotile-asbestos KW mineral fibers KW foaming agent KW foam KW foam concrete JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Egorova, A.D. AU Popov, A.L. AU Zarovnyaev, P.P. AU Duyukov, T.T. PY 2020 IS 5 PB Belgorod State Technological University named after V.G. Shukhov