01125422

Component

https://doi.org/10.3141/2095-05

http://scholar.google.com...+Lee&publication_year=2009

The Korean Pavement Design Guide (KPDG) was developed based on a mechanistic–empirical approach. This paper presents the permanent deformation model of asphalt mixtures in the KPDG. The permanent deformation model for various types of asphalt mixtures was developed by using the results of triaxial repeated loading tests. This model was calibrated with the accelerated pavement test (APT) and the Long-Term Pavement Performance (LTPP) database. Through the triaxial repeated loading tests, the permanent deformation model of asphalt mixtures was developed to address the effects of temperature and initial air voids. The model coefficients for the temperature and air voids obtained from the triaxial tests do not need to be calibrated. However, the model coefficients for the shift factor and number of load repetitions should be calibrated with APT data. This study found that the model requires a correction factor to consider the effects of total asphalt concrete (AC) layer thicknesses. The correction factor is useful for simulating the distribution of a real vertical plastic strain for different AC layer thicknesses. A shift factor was found by comparing the measured rut depth from the LTPP sections and predicted values from the KPDG program. A verification study showed that the final permanent deformation model developed in this study can predict the field rut depth of various AC pavements quite accurately.

01145025

09-1237

English

pp 45-52

2009

Transportation Research Record: Journal of the Transportation Research Board

9780309126328

Print

Figures (7) ; References (8) ; Tables (4)

Accelerated tests; Air voids; Asphalt concrete; Asphalt mixtures; Pavement design; Pavement layers; Pavement performance; Repeated loads; Rutting; Temperature; Thickness; Triaxial shear tests

Korean Pavement Design Guide; Long-Term Pavement Performance Program

Rut depth

South Korea

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

TRIS, TRB, ATRI

Jan 30 2009 5:27PM

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