3. Factors effect on asphalt aging

As indicated before, asphalt in service condition interacts with many environmental and mechanical factors such as, atmospheric oxygen, dissolved oxygen, moisture, ambient and pavement layer temperatures, UV irradiation, traffic. Therefore, all these factors have minor to very severe effects in physical & chemical characteristics of asphalt, and subsequently these effects are reflected in either increase in viscosity, loosening adhesibility, or changes in moduli.

Stimulate asphalt aging has been shown in Table 1 and the Petersen's findings have been presented in Figure 2 respectively.


Table 1. List of individual factors and conjoint factors that affect asphalt aging [28].

Figure 2. Illustration of asphalt aging process due to volatilization, oxidation, absorption and adsorption [28].
