Railway Noise Reduction
- 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 properties but also satisfy 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.