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Title:

Calibration of the MEPDG Rutting Model: Issues and Consequences on Rutting Prediction

Accession Number:

01698427

Record Type:

Component

Abstract:

The repeated load permanent deformation (RLPD) test has been recognized as the most appropriate laboratory procedure to characterize asphalt mixtures, and it is currently used in support of the calibration of the rutting transfer function of the Mechanistic-Empirical Pavement Design Guide (MEPDG). However, many aspects of the RLPD testing conditions, as well as the analysis of the test results and the calibration process itself, seem to be not well defined or accepted and need to be addressed thoroughly for proper calibration.The primary objective of this study is to provide an overview of the possible issues of the calibration process and quantify the errors in the prediction of hot mix asphalt (HMA) rutting using the AASHTOWare Pavement ME software when the calibration is not performed correctly. Four mixtures were characterized in the laboratory by performing confined and unconfined dynamic modulus tests and RLPD tests at a single temperature. RLPD data for two additional temperatures were obtained mathematically using the dynamic modulus shift factors (from both confined and unconfined conditions). The effect on the predicted rutting of (i) using confined and unconfined dynamic modulus testing results to calculate resilient strains and (ii) shift the RLPD data, as well as the (iii) use of a single or multiple RLPD temperatures and (iv) the use of confined and unconfined |E*| as input of the AASHTOWare Pavement ME, have been evaluated. Results obtained from the AASHTOWare Pavement ME software showed a significant variability of the predicted rut depths when the calibration process is not appropriately performed.

Supplemental Notes:

This paper was sponsored by TRB committee AFD60 Standing Committee on Design and Rehabilitation of Asphalt Pavements.

Report/Paper Numbers:

19-02795

Language:

English

Corporate Authors:

Transportation Research Board

Authors:

Seitllari, Aksel

ORCID 0000-0001-8476-5841

Lanotte, Michele A
Kutay, M Emin

Pagination:

6p

Publication Date:

2019

Conference:

Transportation Research Board 98th Annual Meeting

Location: Washington DC, United States
Date: 2019-1-13 to 2019-1-17
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Uncontrolled Terms:

Rutting models

Subject Areas:

Design; Highways; Pavements

Source Data:

Transportation Research Board Annual Meeting 2019 Paper #19-02795

Files:

TRIS, TRB, ATRI

Created Date:

Dec 7 2018 9:25AM