Reducing Railway Noise
Due to accelerated urbanization, industrialization and economic growth in the developed countries, rail transportation especially high-speed railways such as bullet trains have undergone a rebirth in development level and scale across these countries
- There are several methods to mitigate this but some of these methods are highly expensive to build and maintain.
- This brings about the introduction of porous concrete slab using Expanded Clay Aggregate (ECA®) in the construction of rail lines.
- The acoustical/sound absorption properties of porous concrete materials with various gradations, aggregate types, compaction indexes, and fiber contents are determined in the laboratory.
- The results show that porous concrete that uses an Expanded Clay Aggregate (ECA®) can not only bring about good acoustical absorption property but also satisfies the mechanical requirements.
- The gradation of the Expanded Clay Aggregate (ECA®) has a great effect on the acoustic/sound absorption performance of the porous concrete, with high aggregate gradation of 2 - 3 mm.
- The compaction index and fiber content affect both the acoustic/sound absorption and strength property of the porous concrete, with value of 0.4% and 1.8% respectively.
- Porous sound-absorbing concrete slabs can immensely reduce railway noise at different train speeds and that the amount of the noise reduction changes with speed.
Benefits of using Expanded Clay Aggregate (ECA®) in the construction of Railways:
- It improves stability of surrounding area and structures
- It simplifies and reduces compaction
- It reduces load on the supporting soil subgrade
- It reduces the horizontal thrust on the supporting structures
- It reduces settlement
- It provides excellent insulation
- It acts as an excellent drainage material
- It helps reducing railway noise with porous sound-absorbing concrete slab
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