骨架密实型低噪声路面降噪机理的实验研究

Experimental study of noise-reducing mechanism of dense framework structure and low noise pavement

配制了传统的沥青混凝土(AC)、碎石沥青玛蹄脂(SMA)、不同橡胶粉掺量的骨架密实型低噪声路面等3类共5个配比的沥青路面,采用驻波法测量了各类沥青路面的吸声系数。并且分析了橡胶粉掺量对密实型低噪声路面动态模量的影响,得出了结论,即在这些路面中,橡胶粉含量为3%的密实型路面的减振降噪效果最好。

Three classes of asphalt mixtures were tested, namely, ordinary asphalt concrete, SMA, framework dense structure and low noise pavement with different percentage of rubber powder, the total number of mix being 5. Standing wave method was employed to measure the sound absorption coefficient. By comparing differences between the different kinds, the effect of rubber powder on the dynamic modulus was analyzed, and the conclusion is drawn that SMA with 3% rubber power is the best material among these pavements to reduce vibration and noise.