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Title:

Dynamic Complex Modulus (E*) Test as Potential Indicator for Asphalt Mixture Tire-Road Noise Characteristics

Accession Number:

01020534

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

The main objective of this study was to analyze the dynamic modulus (E*) test parameters for conventional and Asphalt Rubber (AR) mixtures to assess if any of the parameters are indicative of the mix’s tire/road noise characteristics. The hypothesis was that an elastic material would potentially produce more tire/road noise than a viscous one. Theoretical and statistical analyses were performed on available laboratory E* test results for a variety of asphalt mixtures. The differences in phase angles, storage (elastic) moduli E’, and the loss (viscous) moduli E’’ were compared to the differences in known noise characteristics of the pavements in the field, to assess if any of them would be an appropriate tire/road noise field performance parameter. The phase angle was shown to potentially be a noise discriminator factor between dense-graded conventional and asphalt rubber mixtures. The phase angles were shown to be statistically higher for AR mixes than for conventional mixes, especially at high temperature conditions, and slightly lower at cold temperature conditions. It was also shown that for tire/road noise reduction, the most desired mix behavior is to have the E’ and E’’ as equal as possible. In addition, the average peak phase angles calculated for each mix type correlated well to the field sound intensity measurements for four different surface types. It was concluded that the viscoelastic properties of the mix measured in the laboratory with the E* test can partially explain one aspect of the noise reduction observed in the field. Other factors such as the air voids and aggregate gradation should not be discounted as they also contribute to the noise reduction characteristics of a given mix.

Monograph Accession #:

01020180

Report/Paper Numbers:

06-3088

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Sotil, Andres
Kaloush, Kamil E
Biligiri, Krishna
Golden, Jay

Pagination:

26p

Publication Date:

2006

Conference:

Transportation Research Board 85th Annual Meeting

Location: Washington DC, United States
Date: 2006-1-22 to 2006-1-26
Sponsors: Transportation Research Board

Media Type:

CD-ROM

Features:

Figures (7) ; References (21) ; Tables (3)

Subject Areas:

Highways; Materials; Pavements; I31: Bituminous Binders and Materials

Source Data:

Transportation Research Board Annual Meeting 2006 Paper #06-3088

Files:

BTRIS, TRIS, TRB

Created Date:

Mar 3 2006 11:12AM