Hot-Mix Asphalt Permanent Deformation Evaluated by Hamburg Wheel Tracking, Dynamic Modulus, and Repeated Load Tests

Author:

Walubita Lubinda F.1,Zhang Jun1,Das Gautam1,Hu Xiaodi2,Mushota Charles3,Alvarez Allex E.4,Scullion Thomas1

Affiliation:

1. Texas A&M Transportation Institute, Texas A&M University System, 3135 TAMU, College Station, TX 77843-3136.

2. Wuhan Institute of Technology, 693 Xiongchu Avenue, Wuhan, Hubei 430073, China.

3. Estal Pride (Z) Ltd., P.O. Box 50402, Lusaka, Zambia.

4. Department of Civil Engineering, University of Magdalena, Carrera 32, No. 22-08, Santa Marta, Magdalena, Colombia.

Abstract

Permanent deformation (or rutting) is a common distress in hot-mix asphalt (HMA) pavements. As part of the HMA mix and structural design processes to optimize field performance, the Hamburg wheel-tracking, dynamic modulus, and uniaxial repeated load permanent deformation tests have been developed to characterize the HMA rutting resistance potential. The primary objective of this study was to compare the three laboratory rutting tests of HMA mixes and to relate their rutting predictive potential to actual field performance. The research methodology incorporated a two-phase approach: laboratory testing and field performance monitoring of selected mixes under both conventional traffic loading and accelerated pavement testing. For the HMA mixes evaluated, a good correlation was observed in the three laboratory tests and in comparison with actual in situ field performance. Overall, the findings indicated that the Hamburg wheel-tracking test was the most feasible test for daily routine HMA mix design and screening, while both the dynamic modulus and repeated load permanent deformation tests exhibited greater potential for comprehensive characterization of HMA material property (e.g., modulus) and applications for pavement structural design as research-level test tools.

Publisher

SAGE Publications

Subject

Mechanical Engineering,Civil and Structural Engineering

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