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Hawesah, HA, Sadique, MM, Harris, C, Al Nageim, H, Stopp, K and Pearl, H (2021) Polymer modified asphalt binder – an approach for enhancing temperature sensitivity for emergency pavement repair. International Journal of Pavement Engineering. ISSN 1029-8436
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Polymer modified asphalt binder – an approach for enhancing temperature sensitivity for emergency pavement repair.pdf - Published Version Available under License Creative Commons Attribution Non-commercial No Derivatives. Download (3MB) | Preview |
Abstract
Conventional hot mix plants operate to support large paving projects, making production more economic with high volume output. When repairs and maintenance are needed, it can be challenging to maintain small quantities of hot bituminous mixtures at a sufficient temperature, especially in the case of winter maintenance. Consequently, the repair materials cannot be compacted to the desired level on some occasions. This research aimed to develop a polymer modified asphalt binder with reduced temperature sensitivity for hand-laid and low-volume applications. The results showed that the highest penetration index has been achieved by modifying bitumen with 20% rubber and 2% wax. The FTIR and XRD analysis indicated that the bitumen, rubber and wax that react chemically to build 3D networks have an interlocked structure in the bitumen matrix resulting in reduced temperature sensitivity of the polymer modified asphalt binder. Furthermore, indirect tensile stiffness, permanent deformation, creep test and fatigue life test, water sensitivity and freeze-thaw cycle demonstrated an improvement in the asphalt mixture properties in terms of mechanical and durability perspectives. Overall, based on this investigation, modifying asphalt binder with 20% rubber and 2% wax resulted in stronger and durable asphalt mixture in comparison to traditional hot mix asphalt.
| Item Type: | Article |
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| Uncontrolled Keywords: | 0905 Civil Engineering |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TE Highway engineering. Roads and pavements |
| Divisions: | Civil Engineering & Built Environment |
| Publisher: | Taylor & Francis |
| Date Deposited: | 22 Sep 2021 09:31 |
| Last Modified: | 11 Nov 2021 12:15 |
| DOI or ID number: | 10.1080/10298436.2021.1975704 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/15526 |
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