Abstract：In order to explore the self-healing performance of Fe2O3-asphalt binder and its influencing factors, the fatigue-healing-fatigue test of Fe2O3-asphalt binder was carried out by DSR test. And the healing ability of asphalt binder with different Fe2O3 dosage ratios under the conditions of different healing time, different loading strain and different damage degree was studied and analyzed. The research results show that the prolongation of healing time is helpful to the self-healing of Fe2O3-asphalt binder, the increase of damage degree will reduce its healing ability, and different loading strain will also affect the healing performance of Fe2O3-asphalt binder. Under the same healing condition, with the increase of the proportion of Fe2O3 content, the healing rate of Fe2O3-asphalt binder increases at first and then decreases, and the increase and decrease range are related to the proportion of Fe2O3 content. When the dosage ratio of Fe2O3 is 20%, the healing rate of asphalt binder reaches the maximum. When four kinds of healing indexes based on the change of complex modulus of asphalt binder before and after healing are used to evaluate the healing performance, the evolution law of the healing rate of Fe2O3-asphalt binder is consistent under the condition of different Fe2O3 dosage ratio. The healing rate calculated by HI1 healing index formula is generally too large, the healing rate calculated by HI2 healing index formula is generally small, and the healing rate calculated by HI3 and HI4 is close to each other.
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2020, Vol. 39 
