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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; Albayati, A; Haynes, BJ

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 Thumbnail


Authors

Q Wei

A Al Ashaibi

Profile image of Yu Wang

Dr Yu Wang Y.Wang@salford.ac.uk
Associate Professor/Reader

A Albayati



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.

Citation

constructed pavement. Case studies in construction materials, 17, https://doi.org/10.1016/j.cscm.2022.e01622

Journal Article Type Article
Acceptance Date Oct 27, 2022
Online Publication Date Oct 28, 2022
Publication Date Oct 28, 2022
Deposit Date Nov 14, 2022
Publicly Available Date Nov 14, 2022
Journal Case Studies in Construction Materials
Publisher Elsevier
Volume 17
DOI https://doi.org/10.1016/j.cscm.2022.e01622
Publisher URL https://doi.org/10.1016/j.cscm.2022.e01622

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