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| Polymer | Dosages | Type of asphalt binder | Optimum content based on fatigue results | Fatigue test | Test temperature | Mode of loading | Reference |
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| SBS, Styrene ethylene Butylene–Styrene (SEBS), SBR latex, Elvaloy, CR | 1%, 3%, 5%, and 10% by wt. of asphalt binder | AC-5, AC-10, and AC-20 | — | ITFT | 25°C | Controlled stress | Khattak et al. [99] |
| The fatigue life of modified mixtures has a strong correlation with both the rheological properties of the binders and the engineering characteristics of the mixtures |
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| Polymerized pellets (PP), SBS | 4% by wt. of asphalt binder | PG 64-16 | — | DTCFT | 20°C | Controlled strain | Sahebzamani et al. [100] |
| The utilization of both polymers resulted in enhanced performance characteristics of asphalt mixtures. However, the aging process significantly deteriorated the fatigue and low-temperature cracking resistance of asphalt mixtures, particularly when they were modified with SBS |
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| Recycled polyethylene PE and CR | 0.2% and 0.3% by wt. of mix. | 60–70 pen grade | 0.2% | 4PBT | 20°C | Controlled strain | Zhang et al. [101] |
| The addition of PE reduced the fatigue life of the asphalt mixtures; the CR improved the PE-modified mixtures’ fatigue resistance |
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| SBS, epoxy | — | 60–70 pen grade | — | 4PBT | 10°C | Controlled strain | Nguyen and Tran [102] |
| Epoxy asphalt mixtures exhibited superior fatigue resistance compared to polymer-modified asphalt mixtures |
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| SBS | 2%, 3%, and 4% by wt. of asphalt binder | PG 58-28 and PG 64-28 | 3% | 4PBT | 20°C | Controlled strain | Qabur [103] |
The addition of polymers to both binders resulted in an increase in the fatigue life of the asphalt mixtures at all strain levels
The presence of certain inconsistencies in the damage results, particularly for PG 64-28 at 3%, can be attributed to the non-homogeneous nature of the 4PBT |
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| SBS | — | PG 64-22 and PG 70-28 | — | 4PBT | 20°C | Controlled strain | Ghabchi et al. [104] |
| The utilization of a polymer-modified binder was found to significantly improve the fatigue life and counteract the detrimental effects caused by the inclusion of RAP and RAS in the asphalt mixture |
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