The rail pad, also known as bottom plate, is an elastic polyurethane pad assembled between the rails and sleeper to protect the top of the sleeper from wear and impact. The initial stiffness of the rail pad is not so high that the deformation of the rails under the load of the spring is very large. This mechanism ensures that the rail pad moves as close as possible to realize close contact with the track.
How often should rail rubber pads be replaced?
Rail rubber pads typically need replacement every 5-10 years, but this varies greatly; high-quality pads in moderate conditions can last 8-25 years, while heavy traffic or harsh environments might require replacement sooner, signaled by cracks, significant compression (over 20-50%), or increased vibration, with regular inspections (twice yearly for high-speed lines) crucial for timely replacement.
Factors Influencing Lifespan
- Traffic Load: Heavier, more frequent trains reduce pad life.
- Environmental Conditions: Extreme heat, cold, or chemicals can degrade rubber faster.
- Material Quality: Higher-quality rubber compounds last longer.
- Maintenance: Regular cleaning and checks prevent premature failure.
What are the advantages of rail rubber pads?
Rail rubber pads offer advantages like reducing vibration, noise, and wear by cushioning the rail-sleeper interface, improving passenger comfort, extending track life, and providing electrical insulation for signaling, all while lowering maintenance costs through better load distribution and shock absorption.
| Rubber Rail Pad | ||
| Technical Parameter | Unit | Value |
| Stiffness | KN | 90-130 |
| Hardness Shore A | ℃ | 72-80 degree |
| Electronic Resistance | Ω | ≥ 106 |
| Tensile Strength before Aging | Mpa | ≥12.5 |
| Elongation before Aging | % | ≥250 |
Key Advantages railway rubber pad :
- Shock Absorption & Vibration Damping: They cushion the impact from passing trains, reducing stress on rails, sleepers (ties), and the entire track structure, preventing fatigue and cracking, especially in concrete ties.
- Noise Reduction: By absorbing vibrations, they significantly lower the noise generated, benefiting both passengers and nearby communities.
- Extended Track Life: Protection from impacts and abrasion prolongs the life of rails, sleepers (wood or concrete), and fasteners, reducing maintenance.
- Improved Load Distribution: They spread the load from the rail foot more evenly over the sleeper, preventing localized crushing.
- Electrical Insulation: Provide crucial electrical isolation, preventing short circuits in signaling systems and protecting against electrochemical corrosion.
GNEE RAIL provides exceptional elastic rail pads of various types for high-speed railways, normal-speed railways, and cranes. Especially the rail pads made of rubber, EVA, TPEE, and HDPE are very popular with customers. Our railway rubber pads fit the rails such as UIC54, UIC60, BS80lbs, BS100lbs, etc. We have more than 130set of machines in our production lines which can reach an annual production capacity of up to 2000, 000 pieces of rail pads. We offer a wide range of rail pads and other track materials at competitive prices.