Research on Fatigue Self-healing Performance of High Modulus Asphalt Mixture
In order to study the influencing factors of self-healing performance of high modulus asphalt mixture,this paper obtains the modulus and fatigue life corresponding to the normalized stiffness and cycle product by four-point bending fatigue test.The stiffness modulus recovery rate and fatigue life recovery rate of high modulus asphalt mixture under different asphalt dosage,void ratio,healing temperature and healing time are studied.The results show that the fatigue life recovery rate increases with the increase of asphalt dosage and self-healing time;when the void ratio is 3.5%and the self-healing temperature is 60℃,the fatigue life recovery rate reaches the maximum value.The effects of asphalt dosage,void ratio,and self-healing temperature on the stiffness modulus recovery rate have the optimal point,and the stiffness modulus recovery rate increases exponentially with the healing time.
high modulus asphalt mixturefatigue performanceself-healingasphalt contentvoid rate
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