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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2008, Vol. 27 ›› Issue (6): 1055-1057,1138.

• • 上一篇    下一篇

沥青混合料静态蠕变劲度模量与动稳定度的关系

樊统江, 何兆益   

  1. 重庆交通大学 土木建筑学院, 重庆 400074
  • 收稿日期:2008-05-26 出版日期:2008-12-20 发布日期:2016-11-07
  • 作者简介:樊统江(1954-),男(土家族),重庆酉阳人,教授,国务院政府津贴获得者,主要从事道、桥、隧等特殊铺装工程和高性能材料研究。E-mail:ftj.163@163.com;Tel:15922591702/13452088718。
  • 基金资助:
    国家自然科学基金关键项目(50678183)

Correlation of the Static Creep Stiffness Modulus with the Dynamic Stability for Asphalt Mixtures

FAN Tong-jiang, HE Zhao-yi   

  1. School of Civil Engineering & Architecture, Chongqing Jiaotong University, Chongqing 400074, China
  • Received:2008-05-26 Online:2008-12-20 Published:2016-11-07

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摘要： 用轮辙试验的动稳定度(以下简称DS)指标反映沥青路面的高温车辙行为具有较好的一致性,但不能作为计算参数用于沥青路面结构设计。通过研究不同沥青混合料的DS和静态蠕变劲度模量的响应,试图将DS指标与静态蠕变劲度模量建立联系用作为沥青路面结构设计参数。选择了AC13和AC25两种级配、60#/70#基质沥青和5%SBS改性沥青两种结合料、花岗岩和石灰岩两种集料,分别进行了车辙试验和静态蠕变试验,其中车辙分别采用5 cm和7 cm厚度试件。结果表明,对同类型级配、结合料、集料和同一车辙厚度的沥青混合料,其DS和静态蠕变劲度模量有良好的相关性,相关系数R2高达0.9以上。但综合考虑级配、结合料、集料和结构厚度等因素后,DS与静态蠕变劲度模量的线性相关性并不理想,其相关系数R2只达到0.591 2。因此,试图将DS转换为静态蠕变劲度模量用作为沥青路面结构设计参数的可行性有待进一步研究。

关键词: 沥青混合料, 动稳定度, 静态蠕变劲度模量, 沥青路面结构设计参数

Abstract: The dynamic stability (DS) obtained by the wheel tracking test can indicate that the rutting behavior of asphalt pavement at high temperature has better consistency,but it can't be used in the design of asphalt pavement structures as a parameter.However,through studying the development of correlation of DS with the static creep stiffness modulus,the DS and static creep stiffness module are tried to be design parameters of the asphalt pavement structures.Therefore,asphalt mixtures made of the two grading for AC13 and AC25,the two binders for conventional bitumen 60#/70# and modified bitumen with 5%SBS,the two aggregate for granite and lime stone are chosen to be carried out the wheel tracking test and the static creep test respectively.In the wheel tracking test,the thickness of rutting test specimens 5 cm and 7 cm is used respectively.The results show that to the same grade,binder,aggregate and thickness of wheel tracking test specimens,a good correlation is between the DS and the static creep stiffness module of asphalt mixtures and the correlation coefficient R2 is over 0.9.However,when considering synthetically different grade,binder,aggregate and the thickness of wheel tracking test specimens,R2 of them is only 0.591 2 and that is not ideal.So the further research on the feasibility of transforming DS into the static creep stiffness module as a structure design parameter of asphalt pavement will be carried out.

Key words: asphalt mixtures, DS (Dynamic Stability), static creep stiffness module, structure design parameter of asphalt pavement

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