Investigations of Premature Failures of Asphalt Overlays Using NDT Tools and Pavement Cores
Premature pavement failures and distresses continue to happen despite significant advancements in pavement technology. This paper reports an integrated approach used to evaluate subsurface conditions of 72 centerline kilometers of a highway pavement, as part of an investigation prompted by premature pavement failures of a recent mill and asphalt overlay project. The integrated approach involved ground penetrating radar (GPR), coring, and laboratory testing, in conjunction with a review of existing falling weight deflectometer (FWD) data, design plans, construction and post-construction documents, and other available data. A visit to the site was arranged to assess the conditions of the overlay and identify the types of distresses which were visible on the pavement surface. GPR data were used to identify contributing factors to the premature surface failures, such as large areas of stripped pavement beneath the new asphalt overlay, and localized areas of wet or moist old asphalt base. Pavement cores provided data to verify the results of GPR tests. FWD test data were used to determine the resilient moduli of the existing pavement layers. The premature pavement failures in this study were believed to be caused by infiltration of water into the milled surface prior to overlaying, questionable structural integrity of the milled surfaces of old asphalt base material, and debonding due to tack coat placement issues. Recommendations based on the findings from this study are included in the paper.
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Supplemental Notes:
- This paper was sponsored by TRB committee AFD10 Standing Committee on Pavement Management Systems.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Amer-Yahia, Cherif
- Miller, Julia
- Majidzadeh, Todd
- Saraf, Chhote
- Majidzadeh, Kamran
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Conference:
- Transportation Research Board 95th Annual Meeting
- Location: Washington DC, United States
- Date: 2016-1-10 to 2016-1-14
- Date: 2016
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; References; Tables;
- Pagination: 17p
- Monograph Title: TRB 95th Annual Meeting Compendium of Papers
Subject/Index Terms
- TRT Terms: Bituminous overlays; Core samples; Failure analysis; Falling weight deflectometers; Ground penetrating radar; Modulus of resilience; Nondestructive tests; Pavement distress
- Uncontrolled Terms: Premature failure; Subsurface conditions
- Subject Areas: Highways; Pavements;
Filing Info
- Accession Number: 01593292
- Record Type: Publication
- Report/Paper Numbers: 16-6339
- Files: PRP, TRIS, TRB, ATRI
- Created Date: Mar 7 2016 5:18PM