The main function of the rubber rail pad is to dampen and isolate the vibration between the rail and the pouring surface of the concrete sleeper. Railway pads are formulated with specific formulations to meet requirements. Compounding is optimized by combining polymers with higher oil resistance and fatigue crack growth resistance. The excellent combination of elastomers preferred in this formulation provides resistance to ozone, weather, heat, flame and higher axle loads.
Grooved rail pads located between the underside of the rail and the top of the sleeper provide effective shock attenuation and extended service life.
What is the full form of Cgrsp in railway?
In Indian Railways, CGRSP stands for Composite Grooved Rubber Sole Plate, a crucial component placed under rails on sleepers (like concrete sleepers) to provide electrical insulation, absorb shocks, and ensure stability, especially on curves, functioning as an improved version of standard Grooved Rubber Sole Plates (GRSP).
Key Functions & Characteristics:
- Material: Made from different rubber compounds (A & B) that are vulcanized together.
- Purpose: Offers better insulation and cushioning than single-layer pads, extending track life.
- Application: Used with concrete sleepers, particularly on sharp curves for wide-base sleepers.
Types of GRSP Rail Rubber Pad:
| S.No | Item Description | RDSO Drawing No. | RDSO Approval |
|---|---|---|---|
| 1 | GROOVED RUBBER SOLE PLATE (GRSP) 6 mm Thick | RT-3703 / RT-3711 | Approved |
| 2 | Composite GRSP 6.2 mm Thick | RT-8327 / RT-6618 | Approved |
| 3 | Composite GRSP 10 mm Thick for WIDER SLEEPERS | RT-8528 | Approved |
| 4 | Composite GRSP 10 mm Thick for DFCCL SLEEPERS | RT-7010 | Approved |
| 5 | Composite GRSP 10 mm Thick for WIDER PSC SLEEPERS | RT-8747 | Approved |
| 6 | 6mm Thick Nylon Chord Reinforced GRSP | RT-7014 to RT-7021 | Approved |
Composite Grooved Rubber Sole Plate vs Ordinary Rail Rubber Pad
A Composite Grooved Rubber Sole Plate (CGRSP) is a premium, multi-layered pad (often rubber + cord) offering superior durability, resilience, and load capacity for heavy-duty rail tracks, while an Ordinary Rail Rubber Pad (GRSP) is typically a single-layer natural rubber pad, providing essential cushioning, vibration damping, and electrical insulation but less robust than its composite counterpart, with CGRSPs designed for higher speeds and axle loads by incorporating reinforcing layers.
- Material & Structure: CGRSP has advanced layered construction with different rubber types (and often cords) for specialized properties; ordinary GRSPs are simpler, single-layer.
- Performance: CGRSPs offer significantly higher dynamic force absorption (up to 65%) and robustness, enabling faster, heavier trains.
- Cost & Durability: CGRSPs are generally more expensive initially but offer a longer service life and better value in demanding conditions.
GNEE RAIL is an ISO 9001:2015 Certified and RDSO (LKO) Approved Firm, all GRSP and CGRSP are Manufactured as per various RDSO Approved Drawings and IRS Specification No. T-47-2006 and RDSO/M&C/RP-198/2007 with Latest Corrigendum / Alterations.We have an installed capacity to Manufacture and Supply more than 10 Million Nos. on Annual basis & have successfully supplied approximately 120 Million nos. in last 18 years.