Effect of maleic anhydride grafted and gamma-irradiated waste polypropylene on rheological properties of asphalt binder.
- Resource Type
- Article
- Authors
- Günay, Taylan; Ahmedzade, Perviz; Hassanpour-Kasanagh, Sajjad; Fainleib, Alexander M.; Starostenko, Olga
- Source
- International Journal of Pavement Engineering. Nov2022, Vol. 23 Issue 13, p4819-4830. 12p.
- Subject
- *MALEIC anhydride
*CRUMB rubber
*RHEOLOGY
*ASPHALT
*SPRINGBACK (Elasticity)
*FATIGUE limit
*STRAINS & stresses (Mechanics)
- Language
- ISSN
- 1029-8436
Waste polymers have been employed as a modifier in bitumen to improve the performance of the binders and reduce plastic pollution. Grafting of maleic anhydride (MA) is a method to increase the chemical and physical consistency between the polymer and binder. In this study, maleic anhydride grafted waste polypropylene was employed as a bitumen modifier. Gamma irradiation is applied to waste polypropylene to improve the compatibility. The effects of MA-grafted irradiated waste polypropylene (PP R -γ-MA) on physical and rheological properties of bitumen were investigated through a test program. Storage stability tests signifies that the gamma irradiation could diminish the phase separation between the modifier and bitumen. The thermorheological tests showed employing PP R -γ-MA improves the high temperature performance, whilst it has a slightly adverse effect on low temperature performance of bitumen. The results of multiple stress creep recovery (MSCR) test indicate that PP R -γ-MA reduces the non-recoverable deformation and enhanced elastic recovery of the material, whereas the linear amplitude sweep (LAS) test result signifies PP R -γ-MA improved the fatigue life of asphalt by increasing fatigue damage resistance under different strain levels. The rheological test results emphasised on the usability of PP R -γ-MA as a modifier in binders. [ABSTRACT FROM AUTHOR]