Preparation and acoustic performance of recycled ceramsiteconcrete noise-absorbing plate [再生陶粒混凝土吸音板的制备与声学性能]

作者：Luan H.; Wu J.; Zhu W.^*; Pan J.; Zhang R.; Zhou H.

来源：Journal of Central South University(Science and Technology), 2020, 51(5): 1299-1308.

DOI：10.11817/j.issn.1672-7207.2020.05.014

• Acoustic performance
• Ceramsite preparation
• Concrete noise-absorbing plate
• Construction waste

Taking the construction wastes as one of the raw materials, incorporating activator, binder and other admixtures, the recycled noise-absorbing ceramsite was prepared with non-sintering process. Utilizing noise-absorbing ceramsite as main aggregate, water-reducing agent was mixed in to adjust water cement ratio and cement dosage. The orthogonal experiment was conducted on the mixture proportion. The mixture proportion was determined after taking the compressive strength as the basic index for practical engineering application with its porosity 20.5%, and compressive strength 12.76 MPa. Referring to the rail traffic site conditions, the mold was designed and the ceramsite concrete was poured. Acoustics performance of the ceramsite concrete was tested in the reverberation chamber. The results show that the porosity is the major factor affecting the noise-absorbing performance and compressive strength of noise-absorbing ceramsite concrete, and the average noise-absorbing and noise-reduction coefficient are 0.74 and 0.8, respectively, according to reverberation chamber test results, which would achieve obvious noise-absorbing effect in rail traffic noise-reduction projects.

• 单位
  桂林理工大学; 广西大学; 南京航空航天大学