Time dependent viscoelastic rheological response of pure, modified and synthetic bituminous binders

Article


Airey, G. D., Grenfell, J. R. A., Apeagyei, A., Subhy, A. and Lo Presti, D. 2016. Time dependent viscoelastic rheological response of pure, modified and synthetic bituminous binders. Mechanics of Time-Dependent Materials. 20 (3), pp. 455-480.
AuthorsAirey, G. D., Grenfell, J. R. A., Apeagyei, A., Subhy, A. and Lo Presti, D.
Abstract

Bitumen is a viscoelastic material that exhibits both elastic and viscous components of response and displays both a temperature and time dependent relationship between applied stresses and resultant strains. In addition, as bitumen is responsible for the viscoelastic behaviour of all bituminous materials, it plays a dominant role in defining many of the aspects of asphalt road performance, such as strength and stiffness, permanent deformation and cracking. Although conventional bituminous materials perform satisfactorily in most highway pavement applications, there are situations that require the modification of the binder to enhance the properties of existing asphalt material. The best known form of modification is by means of polymer modification, traditionally used to improve the temperature and time susceptibility of bitumen. Tyre rubber modification is another form using recycled crumb tyre rubber to alter the properties of conventional bitumen. In addition, alternative binders (synthetic polymeric binders as well as renewable, environmental-friendly bio-binders) have entered the bitumen market over the last few years due to concerns over the continued availability of bitumen from current crudes and refinery processes. This paper provides a detailed rheological assessment, under both temperature and time regimes, of a range of conventional, modified and alternative binders in terms of the materials dynamic (oscillatory) viscoelastic response. The rheological results show the improved viscoelastic properties of polymer- and rubber-modified binders in terms of increased complex shear modulus and elastic response, particularly at high temperatures and low frequencies. The synthetic binders were found to demonstrate complex rheological behaviour relative to that seen for conventional bituminous binders.

JournalMechanics of Time-Dependent Materials
Journal citation20 (3), pp. 455-480
ISSN1385-2000
Year2016
PublisherSpringer
Accepted author manuscript
License
File Access Level
Anyone
Digital Object Identifier (DOI)doi:10.1007/s11043-016-9295-y
Web address (URL)https://doi.org/10.1007/s11043-016-9295-y
Publication dates
Online04 Apr 2016
Publication process dates
Accepted03 Mar 2016
Deposited11 Jul 2019
Copyright holder© 2016 Springer Science+Business Media Dordrecht.
Copyright informationThis is a post-peer-review, pre-copyedit version of an article published in Mechanics of Time-Dependent Materials. The final authenticated version is available online at: http://dx.doi.org/10.1007/s11043-016-9295-y.
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