Acoustic Absorption Model of Porous Asphalt Mixture Based on Its Micro Structure

被引：0
|
作者：
Chen D. [1 ,2 ]
Han S. [3 ,4 ]
Han X. [3 ,4 ]
Su Q. [1 ,2 ]
Wang Z. [3 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu
[2] Key Laboratory of High-Speed Railway Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu
[3] Highway School, Chang'an University, Xi'an
[4] Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an, 710064, Shanxi
来源：
Han, Sen (hyram_hs@chd.edu.cn) | 1600年 / Tongji University卷 / 20期
关键词：
Coefficient of acoustic absorption; Highway engineering; Image analysis; Micro structure; Porous asphalt mixture; Sponge city; Tire/pavement noise;
D O I：
10.3969/j.issn.1007-9629.2017.04.014
中图分类号：
学科分类号：
摘要：
In order to predict the acoustic absorption characteristics of porous asphalt mixture based on design parameters in design stage, a new acoustic absorption model of porous asphalt mixture was proposed based on its micro structure. The acoustic impedance and coefficient of acoustic absorption of porous asphalt mixture were calculated with the electro-acoustic analogy theory. The diameter of characteristic air void of porous asphalt mixture was proposed by using image analysis techniques and statistical analysis theory. The capillary structure values of micro-element were obtained by analyzing the relationship between length of capillary and sphere-capillary diameter ratio of micro-element. Results show that there is a good correlation between the predicted maximum coefficient of acoustic absorption and responding frequency, using this acoustic absorption model of porous asphalt mixture, and tested values with standing wave tube. Ultimately, this acoustic absorption model of porous asphalt mixture was verified as a powerful and robust tool in modeling and predicting the acoustic absorption characteristics of porous asphalt mixture. © 2017, Editorial Department of Journal of Building Materials. All right reserved.
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页码：575 / 581
页数：6
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