多孔混凝土的吸声性能研究  

Research on absorption property of porous concrete

作　　者：朱春银[1] 高建明[2] 张金花[2] 

机构地区：[1]江苏双龙集团有限公司,江苏南京211122 [2]东南大学材料学院,江苏南京211189

出　　处：《江苏建材》2009年第4期23-26,共4页Jiangsu Building Materials

摘　　要：对多孔混凝土的吸声性能进行了研究,研究结果表明,随着设计空隙率的增大,多孔混凝土试样的吸声系数峰值对应的共振频率向高频发展,综合平均吸声系数逐步增加;在空隙率相近的情况下,随骨料粒径的增加,其综合平均吸声系数有降低的趋势;在空隙率、粗骨料级配相同的条件下,试件厚度越小,其吸声系数峰值所对应的共振频率越高。This paper studies the sound absorpition property. It indicates that as the designed void ration is bigger, the resonce frequency is higher and the average sound absorption coefficient gradually increases. If the void ratios are similar one another, the overall absorption coefficient tends to be lower with the increase of size. With the same void ratio and coarse aggregate grading, the resonce freguency becomes higher as the sample thickness is smaller.

关 键 词：多孔混凝土 空隙率 吸声系数 

分 类 号：U414[交通运输工程—道路与铁道工程]