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Title:

Investigation of Moisture Susceptibility of Warm-Mix Asphalt Mixes Through Laboratory Mechanical Testing

Accession Number:

01372778

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/168230.aspx

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Order URL: http://worldcat.org/isbn/9780309223362

Abstract:

Moisture can lead to serious damage and failures in hot-mix asphalt concrete pavements. This is an even greater concern for warm-mix asphalt because the much lower production temperatures may not completely dry the aggregates. In this Maine Department of Transportation study, the use of fracture energy parameters was evaluated to determine the influence of incomplete drying of mixes on their mechanical properties. Fracture energy–based parameters [energy ratio (ER); ratio of energy ratio (RER)] were determined from the following testing of mixes with fully and partially dried aggregates, some of which were subjected to moisture conditioning: resilient modulus, creep compliance, and indirect tensile strength (ITS) at 5°C. The results indicate that (a) resilient modulus, creep compliance, and ITS were all affected by the presence of moisture in mixes; (b) the trend and the degree of influence of moisture for different mechanical parameters were different; (c) the moisture conditioning process caused larger decreases in modulus and ITS values than did incomplete drying of aggregates; however, the same moisture conditioning process caused much larger decreases in modulus and ITS in mixes prepared with incompletely dried aggregates than did the counterparts prepared with fully dried aggregates; and (d) fracture energy–based parameters (ER and RER) appeared to be more-distinctive moisture effect and damage indicators than are the other parameters.

Monograph Accession #:

01454859

Report/Paper Numbers:

12-3238

Language:

English

Authors:

Gong, Wenyi
Tao, Mingjiang
Mallick, Rajib B
El-Korchi, Tahar

Pagination:

pp 27–34

Publication Date:

2012

Serial:

Transportation Research Record: Journal of the Transportation Research Board

Issue Number: 2295
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

9780309223362

Media Type:

Print

Features:

Figures; Photos; References; Tables

Subject Areas:

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

Files:

TRIS, TRB, ATRI

Created Date:

Feb 8 2012 5:15PM

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