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Title:

Probabilistic Evaluation and Component Modeling of Sound Absorption Coefficient of Pervious and Non-Pervious Pavements at the MnROAD Research Facility

Accession Number:

01764085

Record Type:

Component

Abstract:

If pavement surfaces are sound absorbent they may be used to reduce height and cost of noise walls. Sound Absorption Coefficient measures the ratio of sound energy absorbed by a pavement to the total sound energy incident on that pavement surface. This property is proxy for important pavement properties over time. In-place pavement sound absorption tests were conducted with an impedance tube equipped with a white noise source and an analyzer, on various pavement types (Cells 32, 39, 85, 86, 87, 88, and 89 at the MnROAD Low Volume Road) from 2009 to 2014. These cells represent non-pervious concrete, pervious concrete overlay, pervious concrete on granular base, pervious asphalt on granular base, non-pervious asphalt, pervious asphalt on cohesive base, and pervious concrete on cohesive base, respectively. Probabilistic analysis of Sound Absorption at 1000 Hz frequency data showed that the non-pervious pavements had significantly lower values than the pervious pavements. The non-pervious concrete pavements exhibited significantly lower sound absorptions in comparison to the non-pervious asphalt counterparts. Pervious asphalt and non-pervious concrete exhibited the highest and lowest sound absorption coefficient respectively. Unlike the corresponding pervious asphalt cells, pervious concrete pavements built on granular subgrade exhibited higher sound absorption than corresponding pervious pavements on cohesive subgrades. Prediction model developed in this study and validated by the Sound Absorption data showed that traffic (loaded versus unloaded lane) as well as age after construction reduced sound absorption coefficient whereas porosity and viscoelasticity exhibited strong sound absorption enhancing variables.

Supplemental Notes:

This paper was sponsored by TRB committee AEP80 Standing Committee on Transportation-Related Noise and Vibration.

Report/Paper Numbers:

TRBAM-21-01542

Language:

English

Corporate Authors:

Transportation Research Board

Authors:

Izevbekhai, Bernard Igbafen
Christiansen, Annika Ruth

Pagination:

16p

Publication Date:

2021

Conference:

Transportation Research Board 100th Annual Meeting

Location: Washington DC, United States
Date: 2021-1-5 to 2021-1-29
Sponsors: Transportation Research Board; Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References; Tables

Geographic Terms:

Minnesota

Subject Areas:

Highways; Materials; Pavements

Source Data:

Transportation Research Board Annual Meeting 2021 Paper #TRBAM-21-01542

Files:

TRIS, TRB, ATRI

Created Date:

Dec 23 2020 11:19AM