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Fatigue performance of flexible steel fibre reinforced rubberised concrete pavements
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Alsaif, Abdulaziz, Garcia, Reyes, Figueiredo, Fabio P., Neocleous, Kyriacos, Christofe, Andreas, Guadagnini, Maurizio and Pilakoutas, Kypros (2019) Fatigue performance of flexible steel fibre reinforced rubberised concrete pavements. Engineering Structures, 193 . pp. 170-183. doi:10.1016/j.engstruct.2019.05.040 ISSN 0141-0296.
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Official URL: http://dx.doi.org/10.1016/j.engstruct.2019.05.040
Abstract
Recycled rubber particles and steel fibres from end-of-life tyres have the potential to enhance the flexibility and ductility of concrete pavements and produce more sustainable pavement solutions. However, the fatigue behaviour of such pavements is not fully understood. This article investigates the mechanical and fatigue performance of steel fibre reinforced concrete (SFRC) and steel fibre reinforced rubberised concrete (SFRRuC). Specimens tested were cast using rubber particles as replacement of natural aggregates (0%, 30% and 60% by volume), and using a blend of manufactured and recycled tyre steel fibres (40 kg/m3). Prisms were subjected to four-point flexural cyclic load (f = 15 Hz) at stress ratios of 0.5, 0.7, 0.8 and 0.9. The results show that, compared to plain concrete, the addition of steel fibres alone improves the fatigue stress resistance of concrete by 11% (at 25% probability of failure). The replacement of natural aggregates with rubber particles improves the flexibility of SFRRuC (from 51 GPa elastic modules for plain concrete to 13 GPa for SFRRuC), but reduces its fatigue stress resistance by 42% (at 25% probability of failure). However, a probabilistic analysis of the fatigue life data and overall design considerations show that the flexible SFRRuC can be used for pavements. To account for the effect of fatigue load, the Concrete Society approach included in TR34 is modified to account for SFRRuC pavements. Finite element analyses show that flexible SFRRuC pavements can accommodate large subgrade movements and settlements and result in much smaller cracks (up to 24 times) compared to SFRC pavements.
| Item Type: | Journal Article | ||||||||
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| Subjects: | T Technology > TE Highway engineering. Roads and pavements | ||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
| Library of Congress Subject Headings (LCSH): | Pavements, Concrete -- Design and construction, Rubber, Steel | ||||||||
| Journal or Publication Title: | Engineering Structures | ||||||||
| Publisher: | Elsevier Science Ltd. | ||||||||
| ISSN: | 0141-0296 | ||||||||
| Official Date: | 15 August 2019 | ||||||||
| Dates: |
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| Volume: | 193 | ||||||||
| Page Range: | pp. 170-183 | ||||||||
| DOI: | 10.1016/j.engstruct.2019.05.040 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Date of first compliant deposit: | 28 May 2019 | ||||||||
| Date of first compliant Open Access: | 17 May 2020 | ||||||||
| RIOXX Funder/Project Grant: |
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