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Recycled hybrid fiber-reinforced & cement-stabilized pavement mixtures: tensile properties and cracking characterization

Farhan, Ahmed Hilal; Dawson, Andrew; Thom, Nicholas

Authors

Ahmed Hilal Farhan

Andrew Dawson

NICK THOM nicholas.thom@nottingham.ac.uk
Assistant Professor



Abstract

Cement-stabilized aggregate mixtures (CSAMs) have been used effectively within semi-rigid pavement structures. However, the sensitivity to cracking under tensile loading is the main problem that may cause a deterioration due to reflection to the overlaying layers. The primary objective of this research is to show the extent to which the steel fibers extracted from old tires might enhance the pre and post-cracking behavior of CSAMs and to understand how they affect the cracking characteristics. Mechanical performance was evaluated in terms of indirect tensile strength, modulus of elasticity, and post-peak load carrying capacity. Cracking properties were studied quantitatively, at the mesoscale level, using a combination of x-raying of the internal structure and fractal analysis through image processing technique. A new methodology was suggested and implemented for this evaluation. Despite the low cement content, results indicated a decrease in the material stiffness with fiber addition and an improvement in both pre- and post-cracking behavior. There is a clear enhancement in the toughness and deformability of the mixtures indicating a ductile material. Better cracking behavior was observed after fiber incorporation. Finer cracks and more dispersion of these cracks suggest a reduced potential for reflection cracking. A fracture mechanism was proposed and confirmed by examining various cracking patterns.

Citation

Farhan, A. H., Dawson, A., & Thom, N. (2018). Recycled hybrid fiber-reinforced & cement-stabilized pavement mixtures: tensile properties and cracking characterization. Construction and Building Materials, 179, https://doi.org/10.1016/j.conbuildmat.2018.05.233

Journal Article Type Article
Acceptance Date May 27, 2018
Online Publication Date Jun 6, 2018
Publication Date Aug 10, 2018
Deposit Date May 29, 2018
Publicly Available Date Jun 7, 2019
Journal Construction and Building Materials
Print ISSN 0950-0618
Electronic ISSN 1879-0526
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 179
DOI https://doi.org/10.1016/j.conbuildmat.2018.05.233
Keywords Cement-bound pavement mixtures; Tensile testing; Fiber-reinforced cement-stabilized mixture; Fractal dimension; Cracking characterization
Public URL http://eprints.nottingham.ac.uk/id/eprint/52061
Publisher URL https://www.sciencedirect.com/science/article/pii/S0950061818313175
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0

Files

Ahmed Farhan 2017 paper1 final.pdf (2 Mb)
PDF

Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0


Ahmed Farhan 2017 paper1 final.pdf (2.1 Mb)
PDF

Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0



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