Nowadays, it is common to add recycled materials in asphalt mixes without changing the modulus and the low temperature properties. It has been shown that the usage of reclaimed asphalt pavement (RAP), when done properly, can enhance the performance of Hot Mix Asphalt (HMA). However, limited studies have looked at how RAP mixes could be improved. This study mainly focused on utilizing RAP and the effect of RAP fraction and particle size on the overall performance of high RAP mixes produced solely with either coarse or fine RAP particles. In addition, other additives that increase HMA properties have been studied here. Pulp Aramid Fibers (PAF) was added to HMA to study their effectiveness. Performance tests and thermomechanical tests such as tension-compression fatigue tests, thermal cracking resistance (TSRST), rutting resistance, indirect tension test, complex modulus tests and dynamic shear rheometer test were used to characterize the bitumens and the mix. The 2S2P1D rheological model was used to compare the behaviour of the mixes that designed in this study. As a result, fractionating the RAP particle can help to increase the RAP content limits. Also, it is expected that HMA has better performance with inclusion of coarse RAP particles than fine particles. In addition, pulp aramid fiber is suggested as the green alternative to reinforce the pavement to increase the tension resistance. Further investigation recommended regarding the optimization of fiber content in HMA.
| Date | 2 Aug 2021 |
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| Original language | American English |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | Alan Carter (Supervisor) & Hassan Baaj (Co-supervisor) |
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Saliani, S. S. (Author),
Carter (Supervisor) & Baaj (Co-supervisor),
2 Aug 2021Student thesis: Doctoral thesis › Doctorate in Engineering: Engineering