Abstract
The objective of this study is to explore the potential of utilizing self-developed SSPCMs as additives for heat storage temperature regulation in asphalt mastic modification. To achieve this aim, a variety of asphalt mastics with different F-A volume ratios and SSPCM contents were formulated, and their high-temperature rheological properties, modification mechanisms, thermoregulation capabilities, and aging resistance performances were analyzed. The results of temperature regulation test indicated that the maximum cooling amplitude of asphalt mastic could reach 11.3°C, showing a great promising application for cooling asphalt pavements. Additionally, the incorporation of SSPCMs generally resulted in positive impacts on both the high-temperature rheological properties and temperature sensitivity of the asphalt mastics. Moreover, the aging indices GAI, ICO and ISO of the modified asphalt mastic with 30 % SSPCMs decreased by 5.6 %, 18.3 % and 8.7 %, respectively, compared with control asphalt mastic, implying that the incorporation of SSPCMs can retard the aging process of asphalt and enhance the thermal oxidative aging resistance of the asphalt mastics. In summary, the current study demonstrates the feasibility, improved performance, and effective thermoregulation properties of SSPCMs in asphalt mastics.
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