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Title:

Direct Measurements of Volatile and Semivolatile Organic Compounds from Hot- and Warm-Mix Asphalt

Accession Number:

01341999

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Blurbs/166211.aspx

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Order URL: http://worldcat.org/isbn/9780309167437

Abstract:

Emissions from the production and paving of hot-mix asphalt are increasingly being scrutinized. The introduction of warm-mix asphalt (WMA) technologies could potentially lead to a reduction in these emissions. However, the measurement of these emissions is both complex and expensive. To overcome these obstacles, the University of California Pavement Research Center has developed a simplified protocol that can be used in addition to conventional methods and that allows direct comparison of emissions from different mixes measured at the pavement surface during construction. A portable flux chamber is used to capture and directly measure emissions before, immediately after, and 2 h after compaction. Emissions are collected in activated charcoal sorbent tubes and analyzed by using gas chromatography–mass spectrometry in the laboratory to identify individual compounds. The protocol was evaluated during the construction of a test track that will be used in an accelerated pavement test to compare the performance of three rubberized hot-mix asphalt controls against seven rubberized WMA sections. The measured reactive organic gases included selected volatile and semivolatile organic compounds. The results demonstrated that WMA technology type, temperature, and level of compaction greatly influence emissions characteristics. On the basis of the success of the pilot study, the project is being extended to measure other types of emissions, including polycyclic aromatic hydrocarbons, and to assess real-time analysis methods.

Monograph Accession #:

01356126

Report/Paper Numbers:

11-0059

Language:

English

Authors:

Farshidi, Frank
Jones, David
Kumar, Anuj
Green, Peter G
Harvey, John T

Pagination:

pp 1-10

Publication Date:

2011

Serial:

Transportation Research Record: Journal of the Transportation Research Board

Issue Number: 2207
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

9780309167437

Media Type:

Print

Features:

Figures (8) ; References (11) ; Tables (3)

Subject Areas:

Environment; Highways; Materials; Pavements; I15: Environment; I31: Bituminous Binders and Materials

Files:

TRIS, TRB, ATRI

Created Date:

Feb 17 2011 5:19PM

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