Back-calculation of the moduli of asphalt pavement layer using accelerated pavement testing data

Huailei Cheng, Yuhong Wang, Liping Liu, Lijun Sun, Yue Hu, Yi Li

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

4 Citations (Scopus)


The modulus of asphalt mixture is traditionally measured from the laboratory dynamic modulus test. However, different laboratory test methods often lead to obviously different test results. To evaluate the moduli of asphalt mixtures as constructed in field pavements, this study back-calculated the moduli of the pavement layers, based on measured strain data in Accelerated Pavement Testing (APT). Field tests were conducted to measure strains at different locations of the built pavement section at different temperatures and wheel motion speed. The loading frequencies of the asphalt layer subject to different motion speeds were calculated based on the duration of measured strain pulses. Subsequently, the relationship between the motion speed and the loading frequency was established. An finite element (FE) model of the pavement section was created, which was used to back-calculate the moduli of asphalt pavement layers using the measured strain data. Based on the back-calculation results at different loading conditions, the master curve of the field asphalt layer was determined. This master curve was further used to compare with that obtained from laboratory uniaxial compressive test. The relationship between the field and laboratory moduli was determined to be ELaboratory= 1.298EField.

Original languageEnglish
Title of host publicationAccelerated Pavement Testing to Transport Infrastructure Innovation - Proceedings of 6th APT Conference
EditorsArmelle Chabot, Pierre Hornych, John Harvey, Luis Guillermo Loria-Salazar
Number of pages10
ISBN (Print)9783030552350
Publication statusPublished - 2020
Event6th International Conference on Accelerated Pavement Testing, APT 2021 - Nantes, France
Duration: 27 Sept 202129 Sept 2021

Publication series

NameLecture Notes in Civil Engineering
Volume96 LNCE
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565


Conference6th International Conference on Accelerated Pavement Testing, APT 2021


  • Backcalculation
  • Dynamic modulus
  • Field and laboratory
  • Finite element method
  • Master curve
  • Strain response

ASJC Scopus subject areas

  • Civil and Structural Engineering


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