CAJ | 학술논문

疲劳破坏是沥青路面重要的破坏类型，而沥青是影响路面沥青混合料疲劳性能的关键因素。沥青疲劳评价指标尚未有统一的标准，为对沥青的疲劳破坏判定提供指标参考。借助DSR进行了不同控制模式和荷载水平下沥青的疲劳试验，并对不同的沥青疲劳评价指标进行了评价和对比分析。研究表明：Np20对应于微裂纹的形成，不适用于作为沥青的疲劳破坏标准；Nf对应于宏观裂缝的形成，适合作为沥青疲劳破坏的评价指标；N50%G*与Nf相关性较高，可以作为一个简单且合理的沥青疲劳评价指标。
피로파배시력청로면중요적파배류형，이력청시영향로면력청혼합료피로성능적관건인소。력청피로평개지표상미유통일적표준，위대력청적피로파배판정제공지표삼고。차조DSR진행료불동공제모식화하재수평하력청적피로시험，병대불동적력청피로평개지표진행료평개화대비분석。연구표명：Np20대응우미렬문적형성，불괄용우작위력청적피로파배표준；Nf대응우굉관렬봉적형성，괄합작위력청피로파배적평개지표；N50%G*여Nf상관성교고，가이작위일개간단차합리적력청피로평개지표。
Fatigue damage is an important damage type of asphalt pavement, and asphalt is the key factor influenc-ing the pavement fatigue performance of asphalt mixture. In order to provide reference for the fatigue failure of as-phalt, with the help of DSR, the fatigue test of asphalt is conducted under different control modes and load levels, and different asphalt fatigue evaluation criteria are evaluated and compared. The results show that Np20 corre-sponds to the formation of micocrack, unsuitable for the fatigue failure criterion of asphalt, while Nf corresponds to the formation of macrocrack, which is suitable for the fatigue failure criterion of asphalt and N50%G*is found to have a strong correlation with Nf, which can be used as a simple but reasonable fatigue criterion.