Numerical investigation of design strategies to achieve perpetual pavements

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dc.contributor.author Abou-Jaoude, Grace
dc.contributor.author Ghauch, Ziad
dc.date.accessioned 2018-10-16T06:19:06Z
dc.date.available 2018-10-16T06:19:06Z
dc.date.copyright 2012 en_US
dc.date.issued 2018-10-16
dc.identifier.uri http://hdl.handle.net/10725/8636
dc.description.abstract Increasing the hot mix asphalt (HMA) base thickness and modifying the HMA mixture properties to improve the resistance to fatigue cracking are among the most popular methods for achieving long-lasting pavements. Such methods are based on the idea of reducing the tensile strain at the bottom of the HMA layer below the Fatigue Endurance Limit (FEL), a level of strain below which no cumulative damage occurs to the HMA mixture. This study investigates the effectiveness of several design strategies involved in long-life, perpetual pavement design. A 3D Finite Element model of the pavement involving a linear viscoelastic constitutive model for HMA materials and non-uniform tire contact stresses is developed using the commercial finite element program ABAQUS. The effects of asphalt base course thickness and mixture type, rich binder layer, and aggregate subbase layer are examined. Four asphalt base course mixture types - dense graded, polymer modified, high modulus, and standard binder - are studied as a function of the asphalt base course thickness. The results underline a better performance of the high-modulus asphalt base, as compared to the other base course mixtures. The aggregate subbase layer on top of subgrade soil showed a relatively minor effect on the longitudinal and lateral strain response at the bottom of asphalt base course. The addition of a rich binder layer at the bottom of the asphalt base course showed a significant reduction in tensile strains. Tables are provided as a guideline to assess the different alternatives in design of long-life perpetual pavements. en_US
dc.language.iso en en_US
dc.publisher Transportation Research Board
dc.title Numerical investigation of design strategies to achieve perpetual pavements en_US
dc.type Conference Paper / Proceeding en_US
dc.author.school SOE en_US
dc.author.idnumber 200702670 en_US
dc.author.department Civil Engineering en_US
dc.description.embargo N/A en_US
dc.publication.place Washington, D.C.
dc.keywords Base course (Pavements) en_US
dc.keywords Fatigue cracking en_US
dc.keywords Finite element method en_US
dc.keywords Hot mix asphalt en_US
dc.keywords Pavement design en_US
dc.keywords Perpetual pavements en_US
dc.description.bibliographiccitations Includes bibliographical references.
dc.identifier.ctation Abou-Jaoude, G., & Ghauch, Z. (2012). Numerical Investigation of Design Strategies to Achieve Perpetual Pavements. In TRB 91st annual meeting. Transportation Research Board. en_US
dc.author.email grace.aboujaoude@lau.edu.lb en_US
dc.conference.date January 22-26, 2012
dc.conference.place Washington DC, United States
dc.conference.title TRB 91st annual meeting
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url https://trid.trb.org/view/1129559 en_US
dc.orcid.id https://orcid.org/0000-0003-1992-1611
dc.author.affiliation Lebanese American University en_US

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