颜可珍,王绍全,田珊,陈景豪,孙皓.基于Overlay Test评价应力吸收层 抗反射裂缝性能[J].湖南大学学报:自然科学版,2020,(1):108~115
基于Overlay Test评价应力吸收层 抗反射裂缝性能
Research on Anti-reflective Cracking Performance of Stress-absorption Interlayer Based on Overlay Test
  
DOI:
中文关键词:  应力吸收层  反射裂缝  Overlay Test  水损坏  长期老化  沥青混合料
英文关键词:stress-absorption interlayer  reflective cracking  overlay test  moisture damage  long-term aging  asphal tmixtures
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作者单位
颜可珍,王绍全,田珊,陈景豪,孙皓 (湖南大学 土木工程学院湖南 长沙410082) 
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中文摘要:
      为了更好地评价应力吸收层的抗反射裂缝性能,提出采用Overlay Test(OT)试验测定SBS、WTR和WTR/APAO改性沥青应力吸收层在常规条件、浸水和长期老化后的抗反射裂缝性能. 研究发现,试验周期数、荷载损失率和总断裂能能够很好地表征应力吸收层的抗反射裂缝性能;第一周期最大荷载和临界断裂能是评价初期开裂的指标. 试验发现3种应力吸收层在常规条件下均有良好的抗反射裂缝性能,但是水损坏对WTR/APAO的抗裂性能影响较大,长期老化后WTR和WTR/APAO的抗反射裂缝性能大大降低. 3种应力吸收层的OT试验最大荷载-周期数曲线符合幂函数变化规律.
英文摘要:
      In order to study the anti-reflective crack performance of stress-absorption interlayer (SAI),the Overlay Test(OT) was used to determine the anti-reflective cracking performance of SBS,WTR and WTR/APAO modified asphalt SAI under standard conditions,after moisture damage and long-term aging. The research shows that the cycle number,reduction in load and total fracture energy can characterize the anti-reflective cracking performance of SAI. The maximum load in the first cycle and critical fracture energy are indicators for evaluating initial cracking. It is found that three stress-absorption interlayers have good anti-reflective cracking performance under standard conditions. However,the moisture damage has a great influence on the crack resistance of WTR/APAO. The anti-reflective cracking performances of WTR and WTR/APAO are greatly reduced after long-term aging. The OT maximum load-cycle number curve of three SAIs is in accordance with power function.
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