污泥陶砂声屏障的孔结构设计方法  

Study on the Design of Pore Structure in Sludge Ceramsite Sand

作　　者：郭凯 张再武 阳晏 丁庆军[2] 

机构地区：[1]湖北省公路工程咨询监理中心,武汉430000 [2]武汉理工大学材料科学与工程学院,武汉430070

出　　处：《材料导报（纳米与新材料专辑）》2014年第2期192-194,共3页

基　　金：国家十二五科技支撑计划项目(2011BAJ04B05-02)

摘　　要：根据细管中声波传播的特征方程成立的条件，求出相应频率对应的最小理论细管半径；结合吸声材料结构特点，计算出不同粒径形成的声波传播通道半径，依据相应频率对应的最小理论细管半径进行污泥陶砂声屏障的孔结构设计。实验证明：在高速公路噪音主要集中频率范围（5001200Hz）内，采用粒径为0．6～1．18mm污泥陶砂制备的水泥基吸声材料的吸声性能优异，在声波频率i000Hz处吸声系数能够达到0．96。s According to the characteristic equation of acoustic wave in tubule, the theoretic minimum radius under corresponding frequency was calculated. Combining with the characteristics of absorption materials structure, the propagation channel radius of different acoustic wave was calculated, which could help designing pore structure of sludge ceramsite sand sound barrier. According to the experimental results, cementitious sound absorption material prepared by sludge ceramsite with particle size of 0. 6- and 1200 Hz, the main noise range of highway, and at 1.18 mm had a better absorption performance between 500 Hz the about 1000 Hz frequency, acoustical absorption coefficient was 0.96.

关 键 词：声波 细管半径 粒径 吸声系数 

分 类 号：TU52[建筑科学—建筑技术科学]