Investigation into the bond strength of bitumen-fibre mastic

Mohammed, Monketh; Parry, Tony; Thom, Nick; Grenfell, James

Abstract

The loss of bond strength in road pavement surfacing due to high traffic loads or moisture is a recurring problem, creating distresses such as ravelling, fatigue and rutting. It is, therefore, important to find a way to prevent or at least delay the loss of bond strength in asphalt mixtures. Such an improvement would lead to longer service life and a more comfortable drive for road users. This study describes how the pneumatic adhesion tensile testing instrument (PATTI) was used to examine the mechanism by which fibres influence the pull-off tensile strength of asphalt mastic. This study assesses the potential for chemical modification of the binder due to the presence of fibres, by means of work of cohesion and work of adhesion calculations, based on surface energy parameters and a binder drainage test. The study also evaluates the influence of different filler-bitumen ratios and fibre percentages on pull-off tensile strength. The test results indicate that the fibres enhance the pull-off tensile strength of the mastic, in addition to changing the failure mode from cohesive to hybrid, implying an improvement in the cohesive strength of the mastic.

Citation

Mohammed, M., Parry, T., Thom, N., & Grenfell, J. (2018). Investigation into the bond strength of bitumen-fibre mastic. Construction and Building Materials, 190, 382-391. https://doi.org/10.1016/j.conbuildmat.2018.09.084

• Journal Article Type: Article
• Acceptance Date: Sep 14, 2018
• Online Publication Date: Sep 27, 2018
• Publication Date: Nov 30, 2018
• Deposit Date: Sep 27, 2018
• Publicly Available Date: Sep 28, 2019
• Journal: Construction and Building Materials
• Print ISSN: 0950-0618
• Electronic ISSN: 1879-0526
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 190
• Pages: 382-391
• DOI: https://doi.org/10.1016/j.conbuildmat.2018.09.084
• Keywords: Pull-off tensile strength; Work of cohesion; Surface energy; Complex modulus; Drained binder; Fibre
• Public URL: https://nottingham-repository.worktribe.com/output/1137298
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0950061818322621
• Additional Information: This article is maintained by: Elsevier; Article Title: Investigation into the bond strength of bitumen-fibre mastic; Journal Title: Construction and Building Materials; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.conbuildmat.2018.09.084; Content Type: article; Copyright: © 2018 Elsevier Ltd. All rights reserved.
• Contract Date: Sep 28, 2018