Determination of the In-Place Hot-Mix Asphalt Layer Modulus for Rehabilitation Projects Using a Mechanistic-Empirical Procedure

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dc.contributorVirginia Tech Transportation Instituteen
dc.contributorVirginia Techen
dc.contributor.authorLoulizi, Amaraen
dc.contributor.authorFlintsch, Gerardo W.en
dc.contributor.authorMcGhee, Kevin K.en
dc.contributor.departmentCivil and Environmental Engineeringen
dc.contributor.departmentVirginia Tech Transportation Instituteen
dc.date.accessed2013-11-21en
dc.date.accessioned2014-03-19T18:30:15Zen
dc.date.available2014-03-19T18:30:15Zen
dc.date.issued2006-07-01en
dc.description.abstractThis project evaluated the procedures proposed by the Mechanistic-Empirical Pavement Design Guide (MEPDG) to characterize existing hot-mix asphalt (HMA) layers for rehabilitation purposes. Thirty-three cores were extracted from nine sites in Virginia to measure their dynamic moduli in the lab. Falling-weight deflectometer (FWD) testing was performed at the sites because the backcalculated moduli are needed for the Level 1 procedure. The resilient modulus was also measured in the lab because it is needed for the Level 2 procedure. A visual pavement rating was performed based on pavement condition because it is needed for the Level 3 procedure. The selected cores were tested for their bulk densities (Gmb) using the AASHTO T166 procedure and then for their dynamic modulus in accordance with the AASHTO TP62-03 standard test method. Then the cores were broken down and tested for their maximum theoretical specific gravity (Gmm) using the AASHTO T-209 procedure. Finally an ignition test was performed to find the percentage of binder and to reclaim the aggregate for gradation analysis. Volumetric properties were then calculated and used as input for the Witczak dynamic modulus prediction equations to find what the MEPDG calls the undamaged master curve of the HMA layer. The FWD data, resilient modulus data, and pavement rating were used to find the damaged master curve of the HMA layer as suggested for input Levels 1, 2, and 3, respectively. It was found that the resilient modulus data needed for a Level 2 type of analysis do not represent the entire HMA layer thickness, and therefore it was recommended that this analysis should not be performed by VDOT when implementing the design guide. The use of Level 1 data is recommended because FWD testing appears to be the only procedure investigated that can measure the overall condition of the entire HMA layer.en
dc.description.sponsorshipVirginia Department of Transportation 77438en
dc.description.sponsorshipFHWA 77438en
dc.format.extent25 pagesen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationAmara Loulizi, Gerardo Flintsch, and Kevin McGhee. "Determination of the In-Place Hot-Mix Asphalt Layer Modulus for July 2006 Rehabilitation Projects Using a Mechanistic-Empirical Procedure," Virginia Transportation Research Council 530 Edgemont Road Charlottesville, VA 22903, Report No. FHWA/VTRC 07-CR1, July 2006.en
dc.identifier.govdocFHWA/VTRC 07-CR1en
dc.identifier.urihttp://hdl.handle.net/10919/46677en
dc.identifier.urlhttp://www.virginiadot.org/vtrc/main/online_reports/pdf/07-cr1.pdfen
dc.language.isoenen
dc.publisherVirginia Center for Transportation Innovation and Researchen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectMechanistic-empirical designen
dc.subjectDynamic modulusen
dc.subjectResilient modulusen
dc.subjectFalling weight deflectometeren
dc.subjectPavement rehabilitation designen
dc.subjectDamaged master curvesen
dc.titleDetermination of the In-Place Hot-Mix Asphalt Layer Modulus for Rehabilitation Projects Using a Mechanistic-Empirical Procedureen
dc.typeTechnical reporten
dc.type.dcmitypeTexten

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