TY JOUR TI EVALUATION OF THE POSSIBILITY OF USING REFTINSKAYA GRES ASH IN THE PRODUCTION OF CONTINUOUS GLASS FIBER KW properties of ash and slag waste KW modeling of glass compositions KW properties KW glass transition and crystallization of experimental glasses JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Onischuk, V.I. AU Lazarova, Y.S. AU Evtushenko, E.I. PY 2021 IS 6 PB Belgorod State Technological University named after V.G. Shukhov