Viscoelastic characterisation of asphalt concrete under different loading conditions

Asphalt concrete (AC) is a composite material that exhibits time and temperature-dependent properties, and it is generally accepted that AC behaves as a linear viscoelastic solid at small strain levels. Nevertheless, different mechanisms and the damage evolution can change its behaviour from the lin...

Full description

Saved in:
Bibliographic Details
Published in:The international journal of pavement engineering 2022-09, Vol.23 (11), p.3892-3905
Main Authors: Hernandez-Fernandez, Noe, Ossa-Lopez, Alexandra, Harvey, John T.
Format: Article
Language:English
Subjects:
Aggregate gradation
aggregate interaction
Asphalt concrete
Asphalt mixes
complex modulus
Composite materials
Compression tests
Deviation
Energy dissipation
High temperature
hysteresis loop
Temperature dependence
Viscoelasticity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Asphalt concrete (AC) is a composite material that exhibits time and temperature-dependent properties, and it is generally accepted that AC behaves as a linear viscoelastic solid at small strain levels. Nevertheless, different mechanisms and the damage evolution can change its behaviour from the linear viscoelasticity. This study was focused on identifying the causes of the deviation of AC viscoelastic properties under different loading conditions and at small strain levels during complex modulus tests. Sinusoidal tension-compression and compression tests on six asphalt mixtures produced with the same aggregate gradation but different asphalt binders under stress- and strain-controlled conditions were performed within a defined range of frequencies and temperatures. It was found that aggregate interaction and energy dissipation characteristics were the main mechanisms that influenced deviations in the viscoelastic properties, but they were only significant at high temperatures and during considerable nonrecoverable accumulated deformation.
ISSN:1029-8436
1477-268X
DOI:10.1080/10298436.2021.1927026