A rail pad is inserted in between the rail and baseplate or sleeper. Rail pad is introduced to the railway fastening system because of its resilience or viscoelasticity which can be implemented in the intervention of fatigue cracking of sleepers. The dynamic stress from the wheel or rail impact from both regular and irregular movements is attenuated.
Application of rail elastic pads in railways
Rail elastic pads, made of rubber or polyurethane, are crucial components placed between rails and sleepers (ties) to absorb impact, dampen vibration, and distribute train loads, significantly reducing noise, protecting infrastructure from wear (especially concrete ties), increasing track stability, and improving passenger comfort, making them vital for modern, high-speed, and conventional railways.
Where They Are Used:
- Concrete Sleepers: Especially important with concrete ties to prevent the fatigue and damage caused by impact and vibration.
- High-Speed Lines: Critical for managing high dynamic forces and ensuring stability and comfort at speed.
- Ballastless Tracks: Used in advanced fastening systems for slab tracks.
- Transition Zones: Help manage increased stress at locations like bridge approaches or where track types change.
What is the service life of rail pads?
Rail pad service life varies significantly by material, environment, and traffic, generally lasting 8 to 25 years, with common materials like rubber (5-8 yrs), HDPE (10-15 yrs), and composites (8-12 yrs) offering different durability, though advanced systems and good maintenance can extend this to decades, as seen with high-speed rail pads retaining functionality for 20+ years.
Factors Influencing Lifespan
- Material: Natural rubber degrades faster (5-8 yrs) than harder plastics like HDPE (10-15 yrs), while composites balance cushioning and wear.
| Raw Material | Rubber, EVA, TPEE, HDPE |
| Standard | UIC, AREMA, TB/T2626-95 |
| Application | 43kg/m, 50kg/m, 60kg/m, 75kg/m,115RE, UIC54, UIC60, S49 |
| Model number | 43-7-7, 43-10-7, 50-7-9, 50-10-9, 60-10-17, 60-12-17 |
| Operating temperature | -50~70 degrees |
| Certificate | MSDS, ROHS, REACH |
| Notes | They should be stored in a clean, ventilated place. Don't be in direct sunlight, and keep away from the heat source and chemical reagent. Don't touch the oil, organic solvent, and other chemicals. Banned exposure. |
- Traffic Volume: High-frequency, heavy loads, especially on curves, accelerate wear.
- Environment: Exposure to extreme temperatures, UV, or chemicals shortens life.
- Maintenance: Regular checks, bolt re-torquing, and timely replacement of degraded pads extend life.
As a professional rail fastener manufacturer, GNEE RAIL can produce various types of rubber rail pads with different materials, such as natural rubber, EVA, HDPE and so on. In railway fastening system, rubber rail pads are often installed between the rail tracks and the concrete railway sleepers.