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Title:

Prediction of HMA Overlay Fatigue Life Using Full-Scale Test Data

Accession Number:

01589818

Record Type:

Component

Abstract:

To protect the structure and restore a smooth riding surface, many airports repair deteriorating concrete pavements with an overlay of hot mix asphalt (HMA). Reflective cracking is a serious concern associated with the use of HMA overlays but is not addressed in the current Federal Aviation Administration (FAA) Advisory Circular for asphalt concrete (AC) overlaid rigid pavements. Since 2010 four HMA overlays have been constructed, instrumented, and tested at the FAA National Airport Pavement Test Facility (NAPTF). Extensive test data, particularly, crack propagation rates, under controlled loading conditions to mimic the temperature cycles occurring in nature were obtained. This paper presents the development of an overlay fatigue life model using the full-scale test data. The fatigue life model reflected the entire three-stage process involving crack initiation, propagation, and final failure. Regression models were established to relate various parameters including overlay temperature, cracking strain, crack propagation rate, number of loading cycles, and crack length. Based on the validation study results, it was shown that a reasonable prediction of the overlay fatigue life can be forecast. It was also demonstrated that lack of considering fracture healing effect during rest periods could result in substantial overestimation of the crack propagation rate and therefore premature overlay failure.

Supplemental Notes:

This paper was sponsored by TRB committee AFD70 Standing Committee on Pavement Rehabilitation.

Monograph Accession #:

01584066

Report/Paper Numbers:

16-1137

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Yin, Hao

Pagination:

28p

Publication Date:

2016

Conference:

Transportation Research Board 95th Annual Meeting

Location: Washington DC, United States
Date: 2016-1-10 to 2016-1-14
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Uncontrolled Terms:

Test data

Subject Areas:

Aviation; Design; Pavements; I22: Design of Pavements, Railways and Guideways

Source Data:

Transportation Research Board Annual Meeting 2016 Paper #16-1137

Files:

TRIS, TRB, ATRI

Created Date:

Jan 12 2016 4:31PM