透水型沥青路面材料的降噪性能  

Noise-damping performance of draining asphalt pavement

作　　者：丁庆军[1] 沈凡[1] 刘新权[1,2] 刘祖国 胡曙光[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070 [2]湖北省交通规划设计院,湖北武汉430051 [3]武汉市城市高速公路指挥部,湖北武汉430345

出　　处：《长安大学学报（自然科学版）》2010年第2期24-28,共5页Journal of Chang’an University(Natural Science Edition)

基　　金：国家"863"计划重大项目(2006AA11Z117)

摘　　要：以透水型路面为研究主体,利用驻波法测试材料的吸声系数,研究空隙率、粒径和厚度等因素对材料吸声系数的影响规律,探讨多孔路面结构的吸声降噪机理,并结合试验路段的噪声测试结果,评价路面现场降噪性能。研究结果表明:透水型路面中大量的连通孔隙能够有效地吸收路面噪声,随着厚度的增加,其吸声系数峰值向低频移动,小粒径透水型沥青路面材料具有更佳的吸声性能;当采用20%空隙率、40 mm厚的OGFC-13混合料时,吸声系数均值达到0.402,吸声系数峰值达到0.669;透水型沥青路面与普通AC-13C路面相比,路面现场噪声降低了4.7 dB(A);透水型沥青路面材料是一种降噪功能优异的路面材料。By using stationary wave method to test sound absorption coefficient of draining asphalt pavement, the sound absorption rule of draining asphalt pavement with different porosities, grain sizes and thicknesses is researched. Combining the noise testing result of experimental road, the denoising performance of draining asphalt pavement is evaluated. The test results show that. the draining asphalt pavement can absorb the road noise effectively, which has a lot of connected porosities, and whose average and peak of sound absorption moves toward to low frequency when the thickness is increased, and the sound-absorbing performance is better while using smaller size nominal maximum size of aggregate. The average and peak of sound absorption coefficient of OGFC-13 are 0. 402 and 0. 669 respectively, when porosity is 20~, thickness is 40 mm; Comparing with the common AC-13C asphalt pavement, the noise intensity of experimental road is reduced by 4. 7 dB（A） while tested in high-speed traffic. So, the denoising performance of draining asphalt pavement is excellent. 4 tabs, 5 figs, 13 refs. Key words：

关 键 词：道路工程 透水型沥青路面 噪声 驻波法 吸声系数 

分 类 号：U414[交通运输工程—道路与铁道工程] O442[理学—电磁学]