Sound absorption coefficient of coal bottom ash concrete for railway application

[摘要] A porous concrete able to reduce the sound wave that pass through it. When a sound waves strike a material, a portion of the sound energy was reflected back and another portion of the sound energy was absorbed by the material while the rest was transmitted. The larger portion of the sound wave being absorbed, the lower the noise level able to be lowered. This study is to investigate the sound absorption coefficient of coal bottom ash (CBA) concrete compared to the sound absorption coefficient of normal concrete by carried out the impedance tube test. Hence, this paper presents the result of the impedance tube test of the CBA concrete and normal concrete.

[发布机构] Jamilus Research Center, Faculty of Civil and Environmental Engineering, UniversitiTun Hussein Onn Malaysia, Malaysia^1

[效力级别] 土木建筑工程

[关键词] Bottom ash;Impedance tubes;Noise levels;Normal concretes;Porous concretes;Railway applications;Sound absorption coefficients;Sound energy