TY JOUR TI FIRE-RETARDING COMPOSITIONS WITH THE USE OF VERMICULITE, PERLITE AND FIBER-FILLERS KW fire-resistance KW gypsum plaster KW vermiculite KW perlite KW fiber-fillers KW dry-construction mixtures JO Problems of risk management in the technosphere AU Terekhin, S.N. AU Shidlovsky, G.L. AU Tikhonov, Y.M. PY 2015 IS 2015 PB Saint-Petersburg University of State Fire Service of Emercom of Russia