In order to develop composite phase change materials(CPCMs)suitable for asphalt pavements under high-temperature environments,PEG2000 was employed as the phase change material,with bleaching beads serving as the carrier.This approach leveraged the superior phase change properties of PEG2000 and the robust strength of bleaching beads to engineer CPCMs that are both high-strength and temperature-resistant.The CPCMs demonstrated promising phase change heat storage capabilities,alongside significant chemical stability,compatibility,and thermal stability.However,when the incorporation of CPCMs reached 60％,the maximum temperature variance among the test specimens was a mere 2.8 ℃,with the peak temperature occurrence delayed by 2.1 minutes,negatively impacting road performance.As a result,an optimal concentration of CPCMs can effectively moderate the temperature of asphalt mixtures,offering valuable insights for the research into cooling and temperature regulation of asphalt pavements.
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