Journal Published Online: 08 December 2017
Volume 46, Issue 1

Investigation and Modeling of Sound Absorption Properties of Thin Layer Wearing Course

CODEN: JTEVAB

Abstract

Thin layer wearing course is commonly used as a noise-reducing pavement in some European countries. The noise-reducing performance is realized because of small surface texture and higher sound absorption properties. In this paper, the investigation focuses on the sound absorption properties of this type of road surface. Laboratory measurements were carried out to observe the sound absorption curves of the thin layer surfacing course. Both slab specimens produced in the lab and cores drilled from practical road sections were involved in the tests. It was found that surfaces with an air voids content less than 12 % show a smaller sound absorption coefficient, whereas surfaces with air voids content higher than 17 % have promising sound absorption properties. Acoustical models were also developed to describe the sound absorption of the thin layer wearing course. The modeling curves fit the test results better when connected air voids were taken into account. The models are considered applicable for examining the sound absorption coefficient with given mixture compositions, and they can also be used for evaluating the tire-road noise for a thin layer wearing course.

Author Information

Li, Mingliang
Research Institute of Highway Ministry of Transport, Haidian District, Beijing, P. R. China Department of Civil Engineering & Geosciences, Delft University of Technology, Delft, GA, The Netherlands
Xu, Bin
Research Institute of Highway Ministry of Transport, Haidian District, Beijing, P. R. China Dalian University of Technology, Ganjingzi District, Dalian, P. R. China
Cao, Dongwei
Research Institute of Highway Ministry of Transport, Beijing, Haidian District, P. R. China
Fan, Yongjun
Research Institute of Highway Ministry of Transport, Haidian District, Beijing, P. R. China
Ping, Shujiang
Research Institute of Highway Ministry of Transport, Haidian District, Beijing, P. R. China
Pages: 9
Price: $25.00
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Stock #: JTE20160303
ISSN: 0090-3973
DOI: 10.1520/JTE20160303