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Experimental Study on the Elastic Support in a Discrete Rail Fastening System Used in Ballastless Tram Track
Cezary Kraśkiewicz1, Monika Urbaniak1, Andrzej Piotrowski1
1Faculty of Civil Engineering, Warsaw University of Technology, Al. Armii Ludowej 16, 00-637 Warsaw, Poland.
Materials (Basel, Switzerland)
|January 11, 2025
Summary
Recycled rubber baseplate pads offer a sustainable solution for tram tracks, matching the performance of traditional polyurethane underlays. This innovation reduces vibration and noise, promoting eco-friendly construction and faster repairs.
Area of Science:
- Civil Engineering
- Materials Science
- Sustainable Construction
Background:
- Discrete rail fastening systems in ballastless tram tracks significantly impact environmental factors like vibration and noise.
- The Pm49 baseplate's elastic support is crucial for managing these environmental impacts and rail deflections.
- Existing methods for assessing elastic support characteristics are often costly and time-consuming.
Purpose of the Study:
- To experimentally investigate the static and dynamic characteristics of elastic support in Pm49 baseplates for tram tracks.
- To analyze the influence of material properties (thickness, density) on stiffness.
- To establish a correlation between easily measurable on-site parameters and laboratory-determined stiffness values.
Main Methods:
- Laboratory testing of elastic support elements following European standard EN 13146-9 for track category A.
- Analysis of material thickness, density, and Shore hardness.
- Comparison of performance between styrene butadiene rubber (SBR) and polyurethane (PU) based underlays.
Main Results:
- Styrene butadiene rubber (SBR) granules from recycled tires can achieve static and dynamic parameters equivalent to polyurethane (PU) resin underlays.
- Material thickness and density were found to influence stiffness.
- A correlation was established between on-site measurable parameters and laboratory-determined stiffness.
Conclusions:
- Prefabricated SBR baseplate pads are a viable, sustainable alternative to PU underlays for tram track elastic support.
- The use of recycled SBR promotes sustainable materials in construction and reduces environmental pollution.
- SBR pads facilitate rapid installation, beneficial for track maintenance and repair.
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