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为了评价再生沥青混合料的抗老化性能,采用STOA和LTOA试验模拟再生混合料不同使用阶段的老化,并通过老化前后混合料高温性能、低温性能和水稳定性能的变化分析了再生沥青混合料在不同使用阶段的抗老化性能。试验结果表明:经过STOA和LTOA老化后,再生沥青混合料动稳定度变化幅度低于普通沥青混合料;受再生剂扩散作用的影响,经STOA后再生沥青混合料低温性能变化幅度低于普通沥青混合料,经LTOA后再生沥青混合料低温性能变化幅度与普通混合料相当;经STOA和LTOA老化后再生沥青混合料水稳定性能均优于普通沥青混合料,表明再生沥青混合料在各使用阶段的抗老化性能优于普通沥青混合料。
In order to evaluate the anti-aging performance of recycled asphalt mixture, STOA and LTOA test were used to simulate the aging of the recycled mixture at different use stages. The changes of high temperature performance, low temperature performance and water stability of the mixture before and after aging were analyzed. Anti-aging performance in different stages of use. The results show that after STOA and LTOA aging, the change range of dynamic stability of recycled asphalt mixture is lower than that of ordinary asphalt mixture. The change of low temperature performance of recycled asphalt mixture after STOA is lower than that of ordinary asphalt The change of low temperature performance of recycled asphalt mixture after LTOA is comparable with that of ordinary mixture. The water stability of recycled asphalt mixture after aging by STOA and LTOA is better than that of ordinary asphalt mixture, The anti-aging performance is better than ordinary asphalt mixture.