Reducing Railway Noise with Porous Sound-Absorbing Concrete Slabs
The effect of porous sound-absorbing concrete slabs on railway noise reduction is examined in this paper. First, the acoustical absorption coefficients of porous concrete materials with various aggregate types, gradations, fibre contents, and compaction indexes are measured in the laboratory. The la...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2014/206549 |
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| author | Caiyou Zhao Ping Wang Li Wang Dan Liu |
| author_facet | Caiyou Zhao Ping Wang Li Wang Dan Liu |
| author_sort | Caiyou Zhao |
| collection | DOAJ |
| description | The effect of porous sound-absorbing concrete slabs on railway noise reduction is examined in this paper. First, the acoustical absorption coefficients of porous concrete materials with various aggregate types, gradations, fibre contents, and compaction indexes are measured in the laboratory. The laboratory results show that porous concrete that uses a composite of expanded perlite and slag as aggregate can not only obtain good acoustical absorption properties but also satisfy mechanical requirements. Also, the gradation of the combined aggregate has a significant effect on the acoustic absorption performance of the porous concrete, with an optimal aggregate gradation of 1~3 mm. Furthermore, the fibre content and compaction index affect both the strength and the acoustic absorption property of the porous concrete, with the optimum value of 0.3% and 1.6, respectively. Then, the findings from the laboratory studies are used to make porous sound-absorbing concrete slabs, which are applied in a test section. The measurements indicate that porous sound-absorbing concrete slabs can significantly reduce railway noise at different train speeds and that the amount of the noise reduction changes roughly linearly with speed when the train is traveling at less than 200 km/h. The maximum noise reduction is 4.05 dB at a speed of 200 km/h. |
| format | Article |
| id | doaj-art-d910bb9cf961424aaa07924ae1f8c408 |
| institution | OA Journals |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-d910bb9cf961424aaa07924ae1f8c4082025-08-20T02:20:58ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422014-01-01201410.1155/2014/206549206549Reducing Railway Noise with Porous Sound-Absorbing Concrete SlabsCaiyou Zhao0Ping Wang1Li Wang2Dan Liu3Key Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Ministry of Education, Chengdu 610031, ChinaKey Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Ministry of Education, Chengdu 610031, ChinaKey Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Ministry of Education, Chengdu 610031, ChinaKey Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Ministry of Education, Chengdu 610031, ChinaThe effect of porous sound-absorbing concrete slabs on railway noise reduction is examined in this paper. First, the acoustical absorption coefficients of porous concrete materials with various aggregate types, gradations, fibre contents, and compaction indexes are measured in the laboratory. The laboratory results show that porous concrete that uses a composite of expanded perlite and slag as aggregate can not only obtain good acoustical absorption properties but also satisfy mechanical requirements. Also, the gradation of the combined aggregate has a significant effect on the acoustic absorption performance of the porous concrete, with an optimal aggregate gradation of 1~3 mm. Furthermore, the fibre content and compaction index affect both the strength and the acoustic absorption property of the porous concrete, with the optimum value of 0.3% and 1.6, respectively. Then, the findings from the laboratory studies are used to make porous sound-absorbing concrete slabs, which are applied in a test section. The measurements indicate that porous sound-absorbing concrete slabs can significantly reduce railway noise at different train speeds and that the amount of the noise reduction changes roughly linearly with speed when the train is traveling at less than 200 km/h. The maximum noise reduction is 4.05 dB at a speed of 200 km/h.http://dx.doi.org/10.1155/2014/206549 |
| spellingShingle | Caiyou Zhao Ping Wang Li Wang Dan Liu Reducing Railway Noise with Porous Sound-Absorbing Concrete Slabs Advances in Materials Science and Engineering |
| title | Reducing Railway Noise with Porous Sound-Absorbing Concrete Slabs |
| title_full | Reducing Railway Noise with Porous Sound-Absorbing Concrete Slabs |
| title_fullStr | Reducing Railway Noise with Porous Sound-Absorbing Concrete Slabs |
| title_full_unstemmed | Reducing Railway Noise with Porous Sound-Absorbing Concrete Slabs |
| title_short | Reducing Railway Noise with Porous Sound-Absorbing Concrete Slabs |
| title_sort | reducing railway noise with porous sound absorbing concrete slabs |
| url | http://dx.doi.org/10.1155/2014/206549 |
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