FIELD: chemistry.
SUBSTANCE: invention relates to polyurethane, in particular to polyurethane related to polyurethane ballast bed, method for obtaining such bed and railway track or railway track ballast cushion which contain said polyurethane ballast bed. Polyurethane ballast bed contains ballast bed with polyurethane filling agent (20) and polyurethane external protective layer (10), with ballast bed with polyurethane filling agent containing ballast and polyurethane (30) which fills inter-ballast space.
EFFECT: claimed polyurethane ballast bed can be applied in ballast cushion of railway track to increase duration of cycle of ballast bed technical servicing and considerably reduce exploitation expenditures.
8 cl, 1 dwg, 8 tbl, 4 ex
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