Performance of recycled polymeric fiber as reinforcement in bituminous mixture for road maintenance works
Road maintenance is an integral part of creating a good and safe road network. The quality of patching mixture is also seen as an important aspect. Existing bituminous mixture used for road maintenance tends to deteriorate after patching work is completed. This might be due to the differences in sti...
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| Format: | Thesis |
| Language: | English English English |
| Published: |
2019
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/106/1/24p%20NURA%20USMAN.pdf http://eprints.uthm.edu.my/106/2/NURA%20USMAN%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/106/3/NURA%20USMAN%20WATERMARK.pdf |
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| Summary: | Road maintenance is an integral part of creating a good and safe road network. The quality of patching mixture is also seen as an important aspect. Existing bituminous mixture used for road maintenance tends to deteriorate after patching work is completed. This might be due to the differences in stiffness when compared to existing aged pavement. In this research, fibers made from recycled polyethylene terephthalate (PET) are used as reinforcement to increase bituminous mix stiffness and enhance the strength of road maintenance mixture. Three fiber sizes were used at different percentages namely: RPET FA (0.78 x 10mm), RPET FB (3 x 20mm) and RPET FC (3 x 10mm). Water absorption, tensile strength, specific gravity and dynamic mechanical properties tests were conducted on the fiber and found to be suitable for mixture improvements. These fibers are mixed with bituminous mixes for testing. The results showed an improvement of moisture susceptibility of RPET FC by 8%, RPET FB by 6% and RPET FA mixture by 5% compared to control mixture. For fatigue, RPET FC mixture has improved by 120% whereas for rutting resistance of RPET FC mixture has improved by 32% compared to control mixture. A field test was also conducted in this research. After 500 vehicular passes at service temperature (45oC), deformation resistance in the reinforced test pit has improved by 29%. It was found that a significant relationship between fiber properties and performance of recycled PET fiber reinforced mixtures were found. A small sized fiber seems to have less reinforcing ability while a big size fiber does not mean it will have a better ability to act as a reinforcement material. In this research, RPET FC was found to be the best sized fiber at 3mm x 10mm. Based on the findings of this research, RPET FC mixture at 0.3% and RPET FA mixture at 0.5% can be used for road maintenance. It is expected that this research will contribute towards better road maintenance works and reduce road surface defects in the future. |
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