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Title:

Endurance Limit for Hot-Mix Asphalt Based on Healing-Damage Balance Criterion Using Viscoelastic Continuum Damage Analysis

Accession Number:

01478517

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Fatigue endurance limit (FEL) is a key parameter for designing perpetual pavements to mitigate bottom-up fatigue cracking. This study was conducted as part of the National Cooperative Highway Research Program (NCHRP) Project 9-44A to develop a framework and mathematical methodology to determine the FEL using the uniaxial fatigue test. In this unique procedure, the FEL is defined as the allowable tensile strains at which a balance takes place between the fatigue damage during loading, and the healing during the rest periods between loading pulses. The viscoelastic continuum damage model was used to isolate time dependent damage and healing in hot mix asphalt from that due to fatigue. The laboratory testing program consisted of dynamic modulus testing to estimate the viscoelastic properties of the asphalt mixtures, and uniaxial fatigue test experiment conducted with and without rest periods. Five factors that affect the fatigue and healing behavior of asphalt mixtures were evaluated: asphalt content, air voids, temperature, rest period and tensile strain. Based on the test results, a Pseudo Stiffness Ratio (PSR) regression model was developed that is a function of the five factors and the number of loading cycles. The FEL was defined when PSR is equal to 1.0 (net damage is equal to zero). The determined FEL values were rational compared to historical literature ranges. The results from the sensitivity analysis showed rational relationships between the FEL and investigated factors.

Supplemental Notes:

This paper was sponsored by TRB committee AFK50 Characteristics of Asphalt Paving Mixtures to Meet Structural Requirements.

Monograph Accession #:

01470560

Report/Paper Numbers:

13-4507

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Zeiada, Waleed Abdelaziz
Souliman, Mena I
Kaloush, Kamil E
Mamlouk, Michael S

Pagination:

19p

Publication Date:

2013

Conference:

Transportation Research Board 92nd Annual Meeting

Location: Washington DC, United States
Date: 2013-1-13 to 2013-1-17
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Subject Areas:

Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials

Source Data:

Transportation Research Board Annual Meeting 2013 Paper #13-4507

Files:

TRIS, TRB, ATRI

Created Date:

Feb 5 2013 12:52PM