Experimental study of temperature effect on the mechanical tensile fatigue of hydrated lime modified asphalt concrete and case application for the analysis of climatic effect on constructed pavement

Wei, Q, Al Ashaibi, A, Wang, Y ORCID: https://orcid.org/0000-0003-4375-303X, Albayati, A and Haynes, BJ ORCID: https://orcid.org/0000-0002-7364-9447 2022, 'Experimental study of temperature effect on the mechanical tensile fatigue of hydrated lime modified asphalt concrete and case application for the analysis of climatic effect on constructed pavement' , Case Studies in Construction Materials, 17 .

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Abstract

Previous experimental studies have suggested that hot mixed asphalt (HMA) concrete using hydrated lime (HL) to partially replace the conventional limestone dust filler at 2.5% by the total weight of all aggregates showed an optimum improvement on several key mechanical properties, fatigue life span and moisture susceptibility. However, so far, the knowledge of the thermal response of the modified asphalt concrete and thermal influence on the durability of the pavement constructed are still relatively limited but important to inform pavement design. This paper, at first, reports an experimental study of the tensile fatigue life of HMA concrete mixes designed for wearing layer application. Tests were conducted under three different temperatures for five mixes of different HL contents and one with no use of HL. On the experimental data, temperature effect on material fatigue was characterized in terms of the S-N curve modelling parameters. At last, numerical modelling, set at a climatic scenario in the UK, was performed to analyse and compare the seasonal climatic thermal influence on the fatigue life of two pavement structures using and not using the HL modified HMA concrete. Both the experiment and modelling have demonstrated that the 2.5% HL HMA concrete largely enhances the fatigue life of the material and the constructed pavement.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre
Schools > School of Computing, Science and Engineering
Journal or Publication Title: Case Studies in Construction Materials
Publisher: Elsevier
ISSN: 2214-5095
Related URLs:
Depositing User: Y Wang
Date Deposited: 14 Nov 2022 11:55
Last Modified: 14 Nov 2022 12:00
URI: https://usir.salford.ac.uk/id/eprint/65583

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