What is the rubber pad for railway track?
In the complex world of railway fastening systems, there is a component that is small in size but massive in impact: the Railway Rubber Pad (also known as the Rail Pad).
What is a Railway Rubber Pad?
A railway rubber pad is an elastic polyurethane or rubber mat installed between the foot of the steel rail and the concrete sleeper (tie). It acts as a soft interface in an otherwise rigid system, serving as a vital link in both ballasted and ballastless track structures.
| 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 |
| HDPE Rail Pad | |||
| Technical Parameter | Unit | Technical Requirement | Value |
| Density | g/cm3 | 0.95-0.98 | 0.95 |
| Tensile Strength | Mpa | ≥19 | 19 |
| Elongation | % | >80 | 150 |
| Melting Point | ℃ | 170-190 | 190 |
| Insulation Resistance | Ω | ≥1×1010 | 3.5 ×1010 |
| Hardness | A | ≥98 | 98(A) |
| EVA: Polyethylene 80%, Vinyl Acetate 20%. | |||
| Technical Parameter | Unit | Technical Requirement | Value |
| Density | g/cm3 | 0.95-0.98 | 0.95 |
| Tensile Strength | Mpa | ≥15 | 16 |
| Elongation | % | >500 | 550 |
| Melting Point | ℃ | 170-190 | 170 |
| Insulation Resistance | Ω | ≥1×1010 | 5.0 ×1010 |
| Hardness | A | ≥90 | 92(A) |
Key Functions of the Rail Pad
- Vibration Attenuation: When trains pass at high speeds, they generate immense dynamic impact and vibration. The rail pad utilizes its inherent elasticity to absorb and dampen these shocks, preventing them from crushing the sleeper underneath.
- Load Distribution: The contact surface between a steel rail and a concrete sleeper is never perfectly smooth. The pad compensates for these irregularities, ensuring that the vertical load from the train is distributed evenly across the sleeper surface. This prevents stress concentration that could lead to sleeper cracking or abrasion.
- Electrical Insulation: For railways relying on track circuits for signaling, electrical isolation is non-negotiable. High-quality rail pads provide a barrier that prevents electric current from leaking into the ground through the fastening system, ensuring signal reliability.
Material Expertise at GNEE RAIL
Rail pads are manufactured from various materials depending on the required stiffness and environmental conditions, typically including HDPE, EVA, and specialized rubber compounds.
At GNEE RAIL, we don't just supply parts; we provide engineered solutions. Our rail pads are manufactured to meet rigorous international standards such as UIC, DIN, and AREMA. We utilize advanced rubber compounding technologies to ensure our pads exhibit superior fatigue resistance, UV stability, and oil resistance. Whether for Heavy Haul railways requiring high stiffness or High-Speed Rail requiring distinct vibration damping, GNEE RAIL delivers consistency.
Why Choose GNEE RAIL?
We pride ourselves on strict quality control and the ability to customize solutions for your specific track requirements. If you are looking for rail pads that reduce maintenance costs and extend track life, look no further.
Contact GNEE RAIL today for a consultation or a quote. Let us support your railway project with strength and precision.