Jatropha curcas oil as a bio-based rejuvenating agent for reclaimed asphalt pavement mixtures
Recycled asphalt pavement (RAP) is the most effective way to reduce the use of fresh asphalt binder and to consider its application at a higher percentage for the preparation of Hot Mix Asphalt (HMA). Use of RAP in HMA helps to lower the consumption of virgin aggregates and binder, consequently t...
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| Format: | Thesis |
| Language: | English English English |
| Published: |
2019
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/70/1/24p%20KABIRU%20ABDULLAHI%20AHMAD.pdf http://eprints.uthm.edu.my/70/2/KABIRU%20ABDULLAHI%20AHMAD%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/70/3/KABIRU%20ABDULLAHI%20AHMAD%20WATERMARK.pdf http://eprints.uthm.edu.my/70/ |
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| Institution: | Universiti Tun Hussein Onn Malaysia |
| Language: | English English English |
| Summary: | Recycled asphalt pavement (RAP) is the most effective way to reduce the use of fresh
asphalt binder and to consider its application at a higher percentage for the preparation
of Hot Mix Asphalt (HMA). Use of RAP in HMA helps to lower the consumption of
virgin aggregates and binder, consequently the construction cost and conservation of
energy. This research investigates the performance of Jatropha curcas oil (JCO) as a
bio-based rejuvenating agent for reclaimed asphalt binders and mixtures. The optimum
JCO content was determined through asphalt binder test. A total of 4% JCO by mass
of asphalt binder (40% RAP + 60% virgin binder) was incorporated into the binder
and mixtures. The effects of JCO on asphalt binder and mixture were investigated via
physical properties test, bleeding test, diffusion test, rheological properties, chemical
properties and mixtures performance test, respectively. The test results show that the
incorporation of JCO with virgin binder decreased the viscosity and improved the
visco-elastic properties of the rejuvenated binder. Viscosity reduction was also
observed when JCO incorporated with reclaimed asphalt binder. Hence, this indicates
the potential to reduce the production temperature of the RAP mixture. From the
rheological master curves, the addition of JCO decreased the complex modulus values
compared to the virgin binder sample. Atomic force microscopy (AFM) and Fourier
Transform infrared (FTIR) test results showed the ability of JCO to reduce the effects
of aging. The performance of recycled asphalt mixtures was improved in terms of
workability, while reducing the fuel requirement and GHG emissions gas released
during the production of the mixtures. Moreover, the addition of JCO improves the
adhesion between the recycled binder and aggregate, therefore, providing more
resistance to moisture damage. |
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