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Moisture susceptibility assessment of hydrated lime modified asphalt mixture and surface energy

Zaidi, Syed Bilal Ahmed; Airey, Gordon D.; Grenfell, James; Ahmad, Naveed; Ahmed, Imtiaz

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Authors

Syed Bilal Ahmed Zaidi

Profile image of GORDON AIREY

GORDON AIREY GORDON.AIREY@NOTTINGHAM.AC.UK
Professor of Pavement Engineering Materials

James Grenfell

Naveed Ahmad

Imtiaz Ahmed



Abstract

The influence of hydrated lime on moisture susceptibility of asphalt mixture was assessed using a combination of surface energy measurements and modified saturation ageing and tensile stiffness test. Four aggregate types, which are commonly used for manufacturing asphalt mixtures in the UK have been selected. These aggregates were from various rocks across the UK which includes felsic intrusive, calcite sedimentary, mafic extrusive and argillaceous sandstone rock sources. Two out of four aggregate sources including felsic intrusive, and argillaceous sandstone showed improvement with the hydrated lime replacement, however the performance of aggregates from calcite sedimentary, mafic extrusive rocks remained unaffected. Mineralogy test results, showed significant differences among four aggregate types used in this study. The difference in the behaviour of four aggregate types to the hydrated lime replacement can be credited in part to mineralogical composition of different aggregates. The hydrated lime content of 1% was observed better than 2% in the aggregates who showed improved performance with the use of hydrated lime. The trends obtained in the surface energy measurements have been found similar to saturation ageing and tensile stiffness (SATS) test technique. The results clearly illustrate a close agreement between both techniques used in this study for the evaluation of moisture susceptibility.

Citation

Zaidi, S. B. A., Airey, G. D., Grenfell, J., Ahmad, N., & Ahmed, I. (2022). Moisture susceptibility assessment of hydrated lime modified asphalt mixture and surface energy. International Journal of Pavement Engineering, 23(3), 599-611. https://doi.org/10.1080/10298436.2020.1763347

Journal Article Type Article
Acceptance Date Apr 27, 2020
Online Publication Date May 24, 2020
Publication Date 2022
Deposit Date Jul 3, 2020
Publicly Available Date May 25, 2021
Journal International Journal of Pavement Engineering
Print ISSN 1029-8436
Electronic ISSN 1477-268X
Publisher Routledge
Peer Reviewed Peer Reviewed
Volume 23
Issue 3
Pages 599-611
DOI https://doi.org/10.1080/10298436.2020.1763347
Keywords Mechanics of Materials; Civil and Structural Engineering
Public URL https://nottingham-repository.worktribe.com/output/4746933
Publisher URL https://www.tandfonline.com/doi/full/10.1080/10298436.2020.1763347
Additional Information This is an Accepted Manuscript of an article published by Taylor & Francis in International Journal of Pavement Engineering on 24.05.20, available online: http://www.tandfonline.com/10.1080/10298436.2020.1763347

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