Abstract: Aiming at ＲAP ( reclaimed asphalt pavement) of Yu-Chang freeway，the indirect tensile fatigue tests are carried out between a fresh asphalt mixture of AC-16 and the reclaimed AC-16 with ＲAP mixing amount 10，30，and 50 respectively，before and after the long-term aging． The fatigue life ratio Nf( k / n) and fatigue life loss ratio F ( k) are introduced to systematically analyze the variation of the fatigue properties of the reclaimed asphalt mixture． Test results show that: with the increase of ＲAP amount，the reclaimed asphalt mixture fatigue life ratio decreases; meanwhile，the age of fatigue life ratio of the reclaimed asphalt mixture is less than that before aging，and the fatigue life loss ratio increases．

Key words: reclaimed asphalt pavement ( ＲAP) , indirect tensile fatigue test, fatigue properties, fatigue life ratio, fatigue life loss ratio

摘要： 针对渝长高速公路废旧沥青混合料，对新拌沥青混合料 AC-16 和 ＲAP 掺量分别为 10%，30%，50% 的再生AC-16 进行长期老化前后的间接拉伸疲劳试验。引入疲劳寿命比 Nf( k/n) 和疲劳寿命损失率 F( k) 的概念，对再生沥青混合料疲劳特性的变化规律进行了系统评价。试验结果表明: 随 ＲAP 掺量的增加，再生沥青混合料的疲劳寿命比降低，且老化后的疲劳寿命比要小于老化前，且疲劳寿命损失率增加

关键词: 再生沥青混合料, 间接拉伸, 疲劳特性, 疲劳寿命比, 疲劳寿命损失率