Parametric Analysis and Field Validations of Oxidative Ageing in Asphalt Pavements using Multiphysics Modelling Approaches

Abstract

Oxidative ageing in field asphalt pavements is a complex process with coupled multiple physics. This parametric study uses Multiphysics modelling approaches to evaluate the effects of material thermal properties, air voids content and distribution, mastic coating thickness, oxygen accessibility and binder oxidative kinetics on the spatial and temporal evolution of the oxidative ageing in the asphalt pavements. Results suggest that increasing the thermal conductivity of asphalt layers leads to a lower ageing gradient. The variations of base and subgrade layers’ thermal properties cause little to no effects on the oxidative ageing. A high activation energy of the asphalt binder (e.g. by adding anti-ageing additives) reduces the oxidative ageing significantly. Asphalt layers built on unbound granular base will experience greater overall ageing with a C-shaped ageing gradient compared to that built on treated base. Air voids content of <5% yields limited oxidative ageing. Five to nine percent air voids generate a gradually increased oxidative ageing with an obvious gradient across pavement depth. Air voids content beyond 9% leads to a consistently high oxidative ageing due to a full access to the oxygen. Finally, the findings were validated using available literature results and field data from 14 European road sections.

Publication DOI: https://doi.org/10.1080/10298436.2021.2020267
Divisions: College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Engineering Systems and Supply Chain Management
College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Aston Institute of Urban Technology and the Environment (ASTUTE)
College of Engineering & Physical Sciences > Aston Institute of Materials Research (AIMR)
Additional Information: © 2022 The Author(s). Published with license by Taylor & Francis Group, LLC This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Uncontrolled Keywords: Ageing gradient,Air voids content,Asphalt pavements,Oxidative ageing,Parametric analysis,Civil and Structural Engineering,Mechanics of Materials
Publication ISSN: 1029-8436
Last Modified: 19 Jun 2024 07:19
Date Deposited: 10 Jan 2022 09:54
Full Text Link:
Related URLs: https://www.tan ... 36.2021.2020267 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2022-01-09
Published Online Date: 2022-01-09
Accepted Date: 2021-12-13
Authors: Omairey, Eman (ORCID Profile 0000-0003-4915-4900)
Zhang, Yuqing (ORCID Profile 0000-0001-5825-0131)
Soenen, Hilde
Carbonneau, Xavier

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