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中南大学学报(自然科学版)

Journal of Central South University

第51卷    第5期    总第309期    2020年5月

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文章编号:1672-7207(2020)05-1299-10
再生陶粒混凝土吸音板的制备与声学性能
栾皓翔1,吴瑾1,朱万旭2, 3,潘佳玉3, 4,张瑞东3,周红梅3

(1. 南京航空航天大学 土木工程系,江苏 南京,210016;
2. 桂林理工大学 土木与建筑工程学院,广西 桂林,541004;
3. 广西科技大学 土木与建筑工程学院,广西 柳州,545006;
4. 江苏华江建设集团有限公司 建筑设计分公司,江苏 南京,210009
)

摘 要: 通过以建筑垃圾为主要原料,掺入激发剂,黏结剂等外加剂,采用免烧结制备工艺,进行建筑垃圾再生料吸音陶粒的制备。将吸音陶粒作为主要骨料,掺入减水剂调节水灰比和水泥用量,进行吸音陶粒混凝土的配合比正交试验。为满足实际工程应用要求,以抗压强度作为指标确定吸音陶粒混凝土的配合比,其孔隙率为20.5%,抗压强度为12.76 MPa。结合轨道交通现场实际,设计模板尺寸浇筑陶粒混凝土吸音板,并采用混响室法对吸音板进行声学性能测试。研究结果表明:孔隙率是影响吸音陶粒混凝土吸声性能和抗压强度的主要因素。陶粒混凝土吸音板的平均吸声系数为0.74,降噪系数为0.8,满足实际轨道交通工程中的吸音降噪要求。

 

关键字: 建筑垃圾;陶粒制备;混凝土吸音板;声学性能

Preparation and acoustic performance of recycled ceramsiteconcrete noise-absorbing plate
LUAN Haoxiang1, WU Jin1, ZHU Wanxu2, 3, PAN Jiayu3, 4, ZHANG Ruidong3, ZHOU Hongmei3

1. Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
2. College of Civil Engineering and Architecture, Guilin University of Technology, Guilin 541004, China;
3. College of Civil Engineering and Architecture, Guangxi University of Science and Technology, Liuzhou 545006, China;
4. Jiangsu Huajiang Construction Group Co., Ltd., Architectural Design Branch, Nanjing 210009, China

Abstract: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.

 

Key words: construction waste; ceramsite preparation; concrete noise-absorbing plate; acoustic performance

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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