在役乳化沥青冷再生混合料的疲劳性能
发布时间：2019-01-26 09:11
【摘要】：通过应力控制下的劈裂疲劳试验,分析了现场服役多年的乳化沥青冷再生混合料及室内新成型的乳化沥青冷再生混合料劲度模量衰减特征以及2类混合料疲劳破坏阶段的黏弹性特征;结合损伤分析,提出了在役冷再生沥青混合料和新成型冷再生混合料疲劳破坏准则;对比了不同车道的在役冷再生混合料和新成型冷再生混合料的疲劳寿命,结果表明,现场实际轴载作用次数的增加会导致冷再生混合料剩余疲劳寿命的降低,冷再生混合料在使用中存在疲劳性能增长过程.
[Abstract]:Through the splitting fatigue test under stress control, The characteristics of stiffness modulus attenuation of cold recycled emulsified asphalt mixture and newly formed emulsified asphalt cold recycled mixture for many years in the field and viscoelastic characteristics of fatigue failure stage of two kinds of mixtures are analyzed. Combined with damage analysis, the fatigue failure criteria of in-service cold recycled asphalt mixture and newly formed cold recycled asphalt mixture are put forward. The fatigue life of the in-service cold recycled mixture and the newly formed cold recycled mixture in different lanes are compared. The results show that the increase of actual axial load on site will result in the decrease of residual fatigue life of cold recycled mixture. There is a process of fatigue growth in the use of cold recycled mixture.
【作者单位】： 同济大学道路与交通工程教育部重点实验室;
【基金】：国家自然科学基金(51678443) 江西省交通厅项目(2014C00015)
【分类号】：U414
，
本文编号：2415337
[Abstract]:Through the splitting fatigue test under stress control, The characteristics of stiffness modulus attenuation of cold recycled emulsified asphalt mixture and newly formed emulsified asphalt cold recycled mixture for many years in the field and viscoelastic characteristics of fatigue failure stage of two kinds of mixtures are analyzed. Combined with damage analysis, the fatigue failure criteria of in-service cold recycled asphalt mixture and newly formed cold recycled asphalt mixture are put forward. The fatigue life of the in-service cold recycled mixture and the newly formed cold recycled mixture in different lanes are compared. The results show that the increase of actual axial load on site will result in the decrease of residual fatigue life of cold recycled mixture. There is a process of fatigue growth in the use of cold recycled mixture.
【作者单位】： 同济大学道路与交通工程教育部重点实验室;
【基金】：国家自然科学基金(51678443) 江西省交通厅项目(2014C00015)
【分类号】：U414
，
本文编号：2415337
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