dr. haleh azari aashto advanced pavement research laboratory (aaprl)

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Permanent Deformation Characterization Using Incremental Repeated Load Permanent Deformation Test (iRLPD) NEAUPG Steering Committee Meeting March 2012. Dr. Haleh Azari AASHTO Advanced Pavement Research Laboratory (AAPRL). - PowerPoint PPT Presentation

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Dr. Haleh AzariAASHTO Advanced Pavement Research Laboratory (AAPRL)

Permanent Deformation Characterization Using Incremental Repeated Load Permanent Deformation Test (iRLPD) NEAUPG Steering Committee MeetingMarch 2012

11RLPD Test Protocol BackgroundA flow number test protocol was developed during NCHRP 9-19, which was later, refined during NCHRP 9-29 (AASHTO TP 79)Several parameters were left undetermined and not standardizedFHWA ETG has created a task force tostandardize the variables of the test such as test temperature, stress level, confinementEstablish criteria that can reliably discriminate between various mixtures2Selection of Promising RLPD ProtocolsDifferent agencies have offered different approaches in standardizing the flow number testSix promising approaches were selected by the ETG Flow Number Task Force for further evaluationSelected methods are proposed by AAT (NCHRP 9-33), NCAT, Van Quintus (NCHRP 9-30A), MTE, AAPRL, UNRNine different mixtures representing a wide range of traffic and climate were provided by the state DOTs and industries for the evaluationAAPRL is testing the nine materials according to five of the proposed methodsUNR is testing the materials according to UNR proposed method

3Mix.#MixtureTrafficBinder GradeMixture NMAS, mmSupplierLTPPBind High Temperature, 50% Reliability, C1WI (E3)50,000,000 10 &

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