沥青混凝土吸声降噪性能影响因素试验研究  

Experimental study on factors affecting the sound absorption and noise reduction performance of asphalt concrete

作　　者：袁梦 YUAN Meng(JSTI Group,Nanjing 211112,China)

机构地区：[1]苏交科集团股份有限公司,江苏南京211112

出　　处：《山东交通学院学报》2023年第4期104-108,共5页Journal of Shandong Jiaotong University

摘　　要：为构建低噪声环境,研究沥青混凝土吸声降噪性能的影响因素,在1/3倍频程中心频率共12个频率下对开级配抗滑磨耗层(open graded friction course,OGFC)OGFC-13、多孔沥青混凝土(porous asphalt concrete,PAC)PAC-13、马蹄脂碎石沥青混凝土(stone mastic asphalt,SMA)SMA-13、悬浮密实型级配沥青混凝土(asphalt concrete,AC)AC-13进行驻波管试验,分析沥青混凝土自身特征及水对沥青混凝土吸声降噪性能的影响。试验结果表明:沥青混凝土的空隙级配越大、表面构造纹理越丰富、试件厚度越大,沥青混凝土的吸声降噪性能越好;饱水状态下大空隙沥青混凝土的吸声降噪系数大幅衰减。In order to construct a low-noise environment,the factors influencing the sound-absorbing and noise-reducing performance of asphalt concrete are studied.Experimental study are conducted using four types of asphalt concrete layers:open graded friction course(OGFC-13),porous asphalt concrete(PAC-13),stone mastic asphalt(SMA-13),and dense-graded asphalt concrete(AC-13).The tests are carried out at 12 different frequencies within the 1/3-octave band center frequency.The aim is to analyze the impact of asphalt concrete properties and water on the sound-absorbing and noise-reducing performance.The results of the experiments show that asphalt concrete with larger void gradation,richer surface texture,and greater specimen thickness exhibit better sound-absorbing and noise-reducing performance.When saturated with water,asphalt concrete with larger voids experiences a significant attenuation in its sound-absorbing and noise-reducing coefficient.

关 键 词：路面噪声 吸声系数 降噪系数 沥青混凝土 

分 类 号：U416.217[交通运输工程—道路与铁道工程] TV431.5[水利工程—水工结构工程]