TY JOUR TI Prospects for research of phosphogypsum as a material for construction KW waste processing KW secondary raw materials KW building materials KW phosphogypsum KW road bases KW permafrost JO Proceedings of Petersburg Transport University AU Kravchenko, P.A. AU Kulikova, O.A. AU Volgareva, E.A. AU Kostylev, A.A. AU Leschenko, M.I. PY 2024 IS 21 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"