市政技术2025，Vol.43Issue(6)：16-25,10.DOI:10.19922/j.1009-7767.2025.06.016
老化及冻融条件下温拌再生沥青混合料抗反射裂缝疲劳损伤特性研究
Anti-reflective Crack Fatigue Damage Characteristics of Warm Mixed Recycled Asphalt Mixtures Under Aging and Freezing-Thawing Conditions
摘要
Abstract
The fatigue damage of asphalt mixture is one of the important causes of fatigue cracking of asphalt pave-ment in service,which seriously affects the service performance of pavement and significantly shortens the service life of pavement.In order to study the anti-reflective cracking performance of warm mix recycled asphalt mixture under aging and freeze-thaw conditions,six groups of asphalt mixture specimens were designed and prepared to con-duct overlay test(OT)test.At the same time,the anti-reflective cracking performance of the specimens was evalu-ated based on the relative changing rate of load loss rate(CLR).Finally,damage factors were introduced and the re-flective cracking damage model was established based on the Expassoc damage evolution model.The results show that the anti-reflective cracking performance of warm mix recycled asphalt mixture decreases after aging and freeze-thaw cycles;With the increase of reclaimed asphalt pavement(RAP)content,the anti-reflective cracking perfor-mance of warm mix recycled asphalt mixture gradually decreases.The fatigue reflection cracking conforms to the nonlinear damage evolution process.The expassoc damage evolution model can better describe its fatigue damage process.The increase of RAP content will accelerate the damage evolution rate of warm mixed recycled asphalt mix-ture.When RAP content increases from 0％to 70％,the damage evolution rate increases by about 19.5％.Aging and freeze-thaw cycles are positively correlated with the damage evolution rate,that is,the damage evolution rate of warm mix recycled asphalt mixture gradually increases.The research results can provide theoretical basis and data support for the engineering application of warm mix recycled asphalt mixture.关键词
温拌再生沥青混合料/老化作用/冻融循环/OT试验/损伤演化Key words
warm mixed recycled asphalt mixtures/aging effects/freeze-thaw cycles/overlay test(OT)/damage evolution分类
交通工程引用本文复制引用
李楚雄,王岚..老化及冻融条件下温拌再生沥青混合料抗反射裂缝疲劳损伤特性研究[J].市政技术,2025,43(6):16-25,10.基金项目
国家自然科学基金(12262030) （12262030）
