TY JOUR TI A Study of Physical and Mechanical Properties of the Ballast Section Materials for Higher-Speed and High-Speed Railways KW Ballast KW railway track KW abrasion KW impact resistance KW abrasion-tester KW drop-testing machine KW physical and mechanical properties JO Bulletin of scientific research results AU Kolos, A.F. AU Serebryakov, D.V. AU Demin, K.E. AU Chebotaev, D.S. AU Isakov, S.V. AU Evan, N.A. PY 2023 IS 2023 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"