Railway SystemsMaterials for railway systems _
In a railway track structure, the most basic parameter in the design, construction and maintenance is track stiffness. It defines the load capacity and the dynamic behaviour of vehicles and track geometry.
The track’s vertical dynamics are a significant part of the stresses exerted on the structure as well as the level of vibration and noise transmitted, hence the track is influenced by the incorporation of elastic elements, their dynamic properties and the way these are arranged on the structure leads to a considerable improvement in the substructure, offsetting the disadvantages of using concrete sleepers on compact and rigid subgrades, compared with earlier timber-sleeper superstructures.
Impact attenuation for light and heavy rail applications
Cork engineered compounds materials are designed for use as rail pads, baseplate, under sleeper pads and ballast mats. Available in a wide variety of thicknesses these materials provide different degrees of impact attenuation, for light and heavy rail applications, in slab and ballast track, used as well in special track works such as turnouts, crossings and crossovers.
Amorim Railway materials' key features
Rail Pads play a vital role in the cracking deterioration of concrete sleepers. Their main function is to transfer the rail load to the sleeper while filtering out high frequency force components.
Under Sleeper Pads
Under Sleeper Pads are elastic elements located between the sleeper and the ballast mats. This material is a cost-effective way of increasing the elasticity of the superstructure and reducing wear and tear on the ballast.
Baseplate gives the elastic support of the rail on rigid surfaces such as concrete slabs or steel bridges.
Ballast Mats rest on a sub-ballast layer which forms the transition layer to the foundation. This material has a dual effect: on the train–track dynamic behaviour and on the reduction of high-frequency vibrations that are transmitted to the ground.