Abstract
In this paper, a comprehensive state-of-the-art study regarding the mechanism and enhancement of self-repair in asphalt pavement is presented. The review starts with defining the self-repair phenomenon as a natural property in asphalt materials that is associated with other properties such as the viscoelastic response. The difference between self-repair and the viscoelastic response is also presented. In addition, the factors influencing the self-repair mechanism (positively and negatively) are investigated. However, some of these factors remain vague and need to be investigated further. Furthermore, two enhancing self-repair processes, which are extrinsic technologies such as induction heating and encapsulated rejuvenators, are presented as alternative preventive maintenance applied to asphalt pavement. In conclusion, the self-repair could be achieved in an economic way in countries with hot climates, such as Iraq where temperature plays a significant positive role in enhancing the asphalt repair if enough rest period is provided, without the need to other extrinsic technologies to be applied.
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