[1]郭咏梅,倪富健.基于DSR的改性沥青及混合料动态黏弹性能[J].东南大学学报(自然科学版),2014,44(2):386-390.[doi:10.3969/j.issn.1001-0505.2014.02.028]
　Guo Yongmei,Ni Fujian.Dynamic viscoelastic properties of modified asphalt and mixture based on DSR[J].Journal of Southeast University (Natural Science Edition),2014,44(2):386-390.[doi:10.3969/j.issn.1001-0505.2014.02.028]
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基于DSR的改性沥青及混合料动态黏弹性能()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
44
期数:
2014年第2期
页码:
386-390
栏目:
交通运输工程
出版日期:
2014-03-20

文章信息/Info

Title:
Dynamic viscoelastic properties of modified asphalt and mixture based on DSR
作者:
郭咏梅1; 2; 倪富健1
1东南大学交通学院, 南京 210096; 2扬州大学建筑科学与工程学院, 扬州 225127
Author(s):
Guo Yongmei1; 2;  Ni Fujian1
1School of Transportation, Southeast University, Nanjing 210096, China
2College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China
关键词:
改性沥青;  沥青混合料;  动态剪切流变仪(DSR);  动态黏弹性能;  流变主曲线
Keywords:
modified asphalt;  asphalt mixture;  dynamic shear rheometer(DSR);  dynamic viscoelastic property;  rheological master curve
分类号:
U414
DOI:
10.3969/j.issn.1001-0505.2014.02.028
摘要:
为了在相似加载条件下比较改性沥青及混合料的动态黏弹性能,选择4种不同特点的改性沥青,成型了混合料小梁试件.应用动态剪切流变仪(DSR)分别进行了不同温度下的频率扫描试验,根据时间-温度等效原理构建了改性沥青及混合料的流变主曲线,对主曲线形态和流变模型拟合结果进行了对比分析.研究表明:改性沥青及混合料的复数剪切模量主曲线形态相似,采用改进型CAM模型进行拟合的效果很好,相关系数在0.996以上;平衡复数剪切模量G*e可用来区分不同类型改性沥青及其混合料的高温性能;高强改性沥青的高温抗车辙性能明显优于其他改性沥青,但软化点和60 ℃动力黏度不适用于评价高强改性沥青.改性沥青的动态力学响应能够反映其混合料的黏弹性能.
Abstract:
In order to compare the dynamic viscoelastic properties of modified asphalts and mixtures at similar loading conditions, four kinds of modified asphalts with different characteristics are selected, and the beam specimens of their mixtures are formed. Frequency sweep tests at different temperatures are conducted by a dynamic shear rheometer(DSR). The rheological master curves of modified asphalts and mixtures are constructed by the time-temperature superposition principle, and the shapes of master curves and fitting results are analyzed comparatively. The results show that the complex shear modulus master curves of modified asphalts and mixtures, which have similar shapes, can be fitted well by the improved CAM model with correlation coefficients above 0.996. The equilibrium complex shear modulus, G*e, can identify the high-temperature properties of different kinds of modified asphalts and mixtures. The rutting-resistance of high-strength modified asphalt at high temperatures is vastly superior to that of other modified asphalts, but softening point and dynamic viscosity at 60 ℃ are not suitable to evaluate it. The dynamic mechanical responses of modified asphalts can reflect the viscoelastic properties of their mixtures.

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备注/Memo

备注/Memo:
收稿日期: 2013-09-23.
作者简介: 郭咏梅(1969—),女,博士生;倪富健(联系人),男,博士,教授,博士生导师,nifujian@gmail.com.
基金项目: 国家自然科学基金资助项目(51178113).
引用本文: 郭咏梅,倪富健.基于DSR的改性沥青及混合料动态黏弹性能[J].东南大学学报:自然科学版,2014,44(2):386-390. [doi:10.3969/j.issn.1001-0505.2014.02.028]
更新日期/Last Update: 2014-03-20