Accelerated fatigue damage profile of asphalt concrete placed on semi-rigid layer

Yi Li, Jiahao Li, Liping Liu, Lijun Sun*

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review


Asphalt concrete (AC) modulus reduction caused by repeated axle loading significantly affects pavement long-term performance; including when built on a semi-rigid layer. However, quantifying this effect is challenging. The primary objective of this paper was to monitor and evaluate modulus reduction and fatigue damage accumulation at various AC depths utilizing data obtained from two semi-rigid pavement sections. During loading, a non-destructive method, portable seismic pavement analyzer (PSPA), was used to predict the modulus ratio. PSPA test results show that the damage is nonlinear with respect to the loading passes. Also, depth and AC thickness can influence the development of damage. A developed model showed that it could predict the aforementioned nonlinear relationship. The model parameters can be used to identify the damage level at various AC depths. Unexpected compared with previous understanding, the damage in AC layers was found to increased first, then decreased, and finally increased with the depth. Since PSPA is cheap, portable, and easy to apply, this method to identify the damage level in AC layers is proven to be applicable and practical.

Original languageEnglish
Title of host publicationAccelerated Pavement Testing to Transport Infrastructure Innovation
Subtitle of host publicationProceedings of 6th APT Conference
EditorsArmelle Chabot, Pierre Hornych, John Harvey, Luis Guillermo Loria-Salazar
Number of pages10
ISBN (Print)9783030552350
Publication statusPublished - 2020
Externally publishedYes
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


  • APT test
  • Asphalt concrete
  • Fatigue damage
  • Modulus reduction


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