陶粒原材料和级配对水泥基陶粒轨道吸音板吸声性能的影响

Influence of Raw Materials and Grading of Ceramics on Sound Absorption Performance of Cement-based Ceramic Acoustic Panels for Track

为了使城市轨道交通吸声材料国产化,以水泥、陶粒等为原料,制作了水泥基陶粒多孔无砟轨道吸音板。本文采用驻波管法测试不同原材料和级配的水泥基陶粒吸音板吸声系数,得出陶粒原材料和粒径对其吸声性能均有不同影响;对于轨道交通产生的低频噪音,不同粒径范围陶粒混合吸音板的吸声系数大于单一粒径范围陶粒吸音板。通过比对分析,总结归纳出轨道交通水泥基陶粒吸音板粒径的最优配比,为轨道交通吸音板的制作提供参考。

Cement-based ceramic acoustic panel as a new sound absorption material for track is ideal for the localization of sound absorption material under metro rail traffic environment to reduce rail traffic noise. Through the standing wave tube test,t he sizes and raw materials of ceramics have impact on absorption performance. For lowfrequency noise from rail,the sound absorption coefficient of size-mixed ceramic hybrid acoustic panel is greater than single size ceramic acoustic panel. The best composition of ceramics was analyzed to provide theoretical data for cement-based ceramic acoustic panels used in rail track.