隧道低噪音沥青路面降噪性能研究  

Research on Low-noise Asphalt Pavement of Tunnel

作　　者：马保国[1] 魏定邦[1] 李相国[1] 刘新权[1] 张慢[1] 罗忠涛[1] 

机构地区：[1]武汉理工大学硅酸盐材料工程教育部重点实验室,武汉430070

出　　处：《武汉理工大学学报》2010年第7期69-71,共3页Journal of Wuhan University of Technology

基　　金：国家"863"项目(2006AA11Z117)

摘　　要：采用驻波管法研究了混合料的类型、孔隙率、最大粒径和厚度对低噪音沥青混合料吸声性能的影响。研究表明:低噪音沥青路面(Low-noise asphalt pavement)的吸声系数明显高于AC和SMA,并且孔隙率为23%,最大公称粒径为10 mm,厚度为40 mm的沥青混合料吸声系数最大,达到43.2%。提高混合料孔隙率,降低最大公称粒径,采用40 mm厚度的沥青混合料路面,可以有效的降低沥青路面噪音,提高行车舒适度以及减少对公路周围居民的噪音危害。In this paper,sound absorption coefficient of different asphalt concrete,and asphalt of different porosity,maximum grain size,thickness are researched to find the effect on noise reduction performance by standing wave measuring instrument.Finding that of three types of asphalt concrete,sound absorption coeffient of Low-noise asphalt pavement is much higher than others.With a porosity of 23%,maximum grain size of 10 mm,thickness of 40 mm,the coefficient of sound absorption is as high as 43.2%.The result suggests that we can reduce noise of asphalt pavement effectively by adopting Low-noise asphalt pavement type,improving porosity,especially intercommunicating porosity,reducing maximum grain size,adopting the thickness of 40 mm.Thus we can enjoy the comfortable driving and reduce the harm to residents around road.

关 键 词：低噪音沥青路面 驻波管法 吸声系数 孔隙率 

分 类 号：U414[交通运输工程—道路与铁道工程]