The spreading process of high modulus modified asphalt(HMMA)on different aggregates was analyzed through con-tact angle tests,and the influence of warm-mixed additive on the contact angle and surface tension of HMMA was explored;The influence of warm-mixed additive on the micro adhesion of HMMA was investigated using atomic force microscopy testing(AFM)technology.The research results indicate that warm-mixed additive can accelerate the spreading speed of HMMA on different ag-gregates surface,and the characteristics of aggregates themselves also have an impact on the spreading speed of HMMA;The reduc-tion in contact angle and surface tension of HMMA by warm-mixed additive under 155 ℃ temperature conditions is greater than that under 105 ℃ temperature conditions.Warm-mixed additive can significantly improve the surface wetting effect of aggregates with HMMA at high temperatures.The decrease in adhesion and adhesion energy of HMMA is the greatest when the dosage of warm-mixed additive is within the range of 1.5％～2.0％.
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