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Title:

European HMA Mixture Design Practices for Tire-Pavement Noise Reduction

Accession Number:

01336714

Record Type:

Component

Abstract:

Porous asphalt (PA) and thin, gap-graded (TG) mixtures are widely used in Europe to reduce tire-pavement noise. A PA mixture is designed to have open and interconnected air voids to allow water drainage and the absorption of traffic noise. Therefore, a PA mixture is required to have high built-in air void content, maximum possible aggregate size and high aggregate volume. The binder holds the aggregate together in a highly cohesive structure that is capable of resisting permanent deformation as a result of grain-to-grain contact between aggregates. TG mixtures, on the other hand are designed to have smaller maximum aggregate size (MAS) TG mixtures are identified by their large void structure in the aggregate skeleton that is filled with bitumen mortar. The aggregate skeleton provides resistance to deformation whereas the bitumen mortar provides resistance to fatigue. European material specifications for PA and TG mixtures on aggregates, binder and additives recommend certain requirements for improved tire-pavement noise reduction, acoustic durability, and resistance to mechanical and environmental conditions. Mixture design parameters such as air void content, aggregate gradation, maximum aggregate size, and binder and fiber contents are also specified in order to improve the acoustic performance of PA and TG mixtures. In this paper, PA and TG mixture design practices used in Europe for tire-pavement noise reductions are presented. Acoustic performance and durability issues associated with PA and TG mixtures are also discussed.

Monograph Accession #:

01329018

Report/Paper Numbers:

11-3961

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Woldemariam, Wubeshet
Olek, Jan
McDaniel, Rebecca S

Pagination:

13p

Publication Date:

2011

Conference:

Transportation Research Board 90th Annual Meeting

Location: Washington DC, United States
Date: 2011-1-23 to 2011-1-27
Sponsors: Transportation Research Board

Media Type:

DVD

Features:

Figures (1) ; References (12) ; Tables (6)

Uncontrolled Terms:

Aggregate size

Subject Areas:

Highways; Materials; Pavements; I23: Properties of Road Surfaces; I33: Other Materials used in Pavement Layers

Source Data:

Transportation Research Board Annual Meeting 2011 Paper #11-3961

Files:

TRIS, TRB

Created Date:

Feb 17 2011 6:42PM