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不同疲劳试验中改性沥青混合料疲劳性能对比
Comparison of Fatigue Properties of Modified Asphalt Mixtures in Different Fatigue Tests
投稿时间:2018-04-14  修订日期:2018-07-10
DOI:103969/j.issn.1007 9629201901022
中文关键词:  疲劳寿命  改性沥青混合料  四点弯曲疲劳试验  两点梯形梁疲劳试验  OT
英文关键词:fatigue life  modified asphalt mixture  four point bending beam fatigue test(4PB)  two point trapezoidal beam fatigue test(2PB)  overlay tester(OT)
基金项目:国家自然科学基金资助项目(51478351)
           
作者单位
黄卫东
HUANG Weidong
同济大学道路与交通工程教育部重点实验室,上海201804
Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, China
钟皓白
ZHONG Haobai
同济大学道路与交通工程教育部重点实验室,上海201804
Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, China
李本亮
LI Benliang
同济大学道路与交通工程教育部重点实验室,上海201804
Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, China
黄明
HUANG Ming
上海市政工程设计研究总院集团有限公司,上海200092
Shanghai Municipal Engineering Design InstituteGroup Co., Ltd., Shanghai 200092, China
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中文摘要:
      使用四点弯曲疲劳试验(4PB)、两点梯形梁疲劳试验(2PB)和overlay tester(OT)试验3种试验方法,对工程上常用的7种沥青混合料疲劳性能进行了测试.结果表明:在3种疲劳试验中,掺加6%(质量分数,下同)SBS的改性沥青混合料疲劳性能均较好,同时掺加10% TB胶粉和3% SBS的改性沥青混合料、掺加45% SBS的改性沥青混合料和同时掺加45% SBS及04%多聚磷酸(PPA)的改性沥青混合料疲劳性能均一般,掺加3% SBS的改性沥青混合料疲劳性能较差,温拌剂改性沥青混合料和埃索基质沥青混合料的疲劳性能最差;提高SBS掺量可以有效地提高沥青混合料的疲劳性能;添加TB胶粉和PPA可以在不同程度上提高SBS改性沥青混合料的疲劳寿命,但其对疲劳性能的影响力逊于SBS;不同试验方法中沥青混合料疲劳性能的排序具有一致性,具体排序稍有不同.
英文摘要:
      Four point bending beam fatigue test(4PB), two point bending beam fatigue test(2PB), and overlay tester(OT) were used to evaluate the fatigue properties of seven kinds of asphalt mixtures that are usually used in engineering. The result shows that in three kinds of fatigue tests, the fatigue performances of 6%(by mass, the same below) SBS modified asphalt mixture is good, the fatigue performances of 10% TB+3% SBS modified asphalt mixture,45% SBS modified asphalt mixture and 45% SBS+04% polyphosphoric acid(PPA) modified asphalt mixture are fine, and the fatigue performance of 3%SBS modified asphalt mixture is inferior. The fatigue performances of warm mixing agent modified asphalt mixture and ESSO bitumen are the worst. The increase of SBS content can effectively improve the fatigue performance of the asphalt mixture. The fatigue performance of the SBS modified asphalt mixture can be improved by the addition of TB and PPA, but the effect on fatigue performance is not as big as that of increasing SBS content. In different tests, the ranking of fatigue performance of asphalt mixture is similar, and the specific ranking is slightly different.
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