摘要
级配碎石作为道路上基层,可以很好地减少半刚性基层沥青路面反射裂缝.但是级配碎石柔性基层存在回弹模量小及永久变形大,施工性较差等问题.从解决级配碎石缺陷入手,采用添加粘结剂的微沥青碎石作为路面的过渡层,提出几种建议级配并确定粘结剂用量范围,从马歇尔试验、CBR试验及无侧限抗压强度试验进行研究,选取适合微沥青碎石的评价指标,并进行性能分析.达到提高级配碎石的模量、施工和易性、减少路面反射裂缝的目的.
As the upper base of the road,graded crushed stone can effectively reduce the reflectivecrack of Semi-rigid base asphalt pavement.But it has many problems,such as：low resilient modulus,large permanent deformation,worse constructability.In order to solve the defect of graded crushed stone,we use the Micro Asphalt Gravel as the upper base of the road which added binder,propose several mix design method and dosage of binder,From the Marshall test,CBR test and unconfined compression test,selecting the suitable evaluation index for Micro Asphalt Gravel,then carry on performance research.Finally we improve the resilient modulus and workability of graded crushed stone,and reduce the reflective crack of the pavement.
出处
《武汉理工大学学报（交通科学与工程版）》
2015年第2期259-263,共5页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
甘肃省交通运输厅科研项目资助(批准号:201211)
关键词
微沥青碎石
配合比设计
性能分析
micro asphalt gravel
mix design method
performance research
