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    Rail bridge waterproofing

    Most railway bridges are concrete bridges, or steel bridges with concrete superstructure. However, there are still quite a few monumental arch bridges with a substructure made of masonry or natural stone. These arches loaded with a soil pack and ballast layer often require renovation and waterproofing. The liquid waterproofing membrane POLYAC® BDM allows these complex substrates to be waterproofed seamlessly by either manual or spray application.

    Due to the speed of curing of these resins and their applicability under different climatic conditions, railway outage times can be minimised.

    For ballasted railway bridges, the membrane is made with a greater thickness to be perforation-resistant to the impact of the ballast material. To this end, the necessary dynamic punching resistance tests or ballasted fatigue tests were carried out.

    In case the tracks are not embedded in a ballast layer but in a concrete pavement, a lower membrane thickness is possible. The membrane can be placed beneath the concrete surface, or on top of the entire concrete structure and protected with a UV-resistant top layer.