KLP Hybrid Polymer Sleepers

Reduced maintenance with KLP Hybrid Polymer Sleepers

In the same way that the inflexible old oak trees get uprooted in a strong storm in Aesop’s fable, a track support with too high track stiffness will cause premature failure and result in higher maintenance costs than anticipated. Track support that is too stiff does not spread the load sufficiently, resulting in extremely high localised impact loads and stresses (in track, sleepers, and fasteners). This may result in microcracks in rigid sleepers, failure of screws or clips, ballast attrition or ground vibrations. Causes for too high track stiffness include rigid subgrade (including concrete bases such as bridges, viaducts, tunnels) and overly stiff sleepers, such as concrete sleepers. Read more