不同类型沥青路面吸声性能及机理的实验研究

为研究不同路面类型的吸声性能,利用驻波管按1/3倍频分别测定不同路面类型的混合料试件的平均吸声系数,并从沥青添加剂、混合料级配、路面表面特征等方面(沥青-混合料-路面)进行实验研究.结果表明,间断级配要比连续级配吸声效果好;沥青外掺剂对路面的吸声性能有改善作用;路面混合料孔隙率越大,平均吸声系数越大,吸声效果越好;微表处路面的平均吸声系数大小与原路面类型有直接的关系,原路面平均吸声系数愈大,吸声效果愈好;微表处路面平均吸声系数峰值有向(1.2~1.6)kHz频率区间偏移的趋势.

Experimental Study on Sound Absorption of Asphalt Pavement with Different Types

In order to study the sound absorption performance of different types of asphalt pavement,a standing weve tube experiment is carried out to research the average sound absorption coefficient from three aspects of Asphalt additives,mixture gradation,road surface characteristics. The results show that,the sound absorption effects of discontinuous gradation is better than the sound absorption effects of Continuous gradation,and the asphalt with additives can improve the sound absorption performance. When the po...