[1]徐鸥明,曹志飞,李明月,等.星型SBS改性沥青热氧和紫外光老化特性研究[J].南京理工大学学报(自然科学版),2019,43(05):660.[doi:10.14177/j.cnki.32-1397n.2019.43.05.017]
 Xu Ouming,Cao Zhifei,Li Mingyue,et al.Thermo-oxidative and ultraviolet radiation aging effect onproperty of star-shaped SBS modified asphalt[J].Journal of Nanjing University of Science and Technology,2019,43(05):660.[doi:10.14177/j.cnki.32-1397n.2019.43.05.017]
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星型SBS改性沥青热氧和紫外光老化特性研究()
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
43卷
期数:
2019年05期
页码:
660
栏目:
出版日期:
2019-10-31

文章信息/Info

Title:
Thermo-oxidative and ultraviolet radiation aging effect onproperty of star-shaped SBS modified asphalt
文章编号:
1005-9830(2019)05-0660-07
作者:
徐鸥明1曹志飞1李明月1程贤鹏2韩 森2
长安大学 1.交通铺面材料教育部工程研究中心; 2.特殊地区公路工程教育部重点实验室,陕西 西安 710064
Author(s):
Xu Ouming1Cao Zhifei1Li Mingyue1Cheng Xianpeng2Han Sen2
1.Engineering Research Center of Transportation Materials; 2.Key Laboratory of Highway Engineeringin Special Region of Education Ministry,Chang’an University,Xi’an 710064,China
关键词:
苯乙烯-丁二烯-苯乙烯嵌段共聚物改性沥青 热氧老化 紫外光老化 表观黏度 动力学模型
Keywords:
styrene-butadiene-styrene modified asphalt thermo-oxidative aging ultraviolet radiation aging apparent viscosity kinetic models
分类号:
U416.01
DOI:
10.14177/j.cnki.32-1397n.2019.43.05.017
摘要:
为了评价热氧和紫外光老化对星型苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)改性沥青主要技术性质的影响,通过室内老化模拟试验,研究了沥青经不同老化时间的针入度、延度、软化点和表观黏度的变化规律,基于表观黏度建立了星型SBS改性沥青老化动力学模型。结果表明,热氧老化与紫外光老化对星型SBS改性沥青主要技术特性的影响基本相同,即针入度、延度随老化时间延长呈减小趋势,135 ℃表观黏度呈增大趋势,而软化点呈非单调性变化趋势; 不同基质沥青制成的SBS改性沥青在热氧老化过程中老化反应速率存在差异,而在紫外光老化过程中基本接近; SBS改性沥青热氧老化与紫外光老化均遵循一级氧化动力反应方程,建立的老化模型能预估热氧和紫外光耦合作用下星型SBS改性沥青的表观黏度。
Abstract:
In order to evaluate effects of thermo-oxidative aging and ultraviolet radiation(UV)aging on the primary technical properties of star-shaped styrene-butadiene-styrene(SBS)modified asphalt,the penetration,ductility,softening point and apparent viscosity of binders after various aging times are studied by laboratory simulation tests. The aging kinetic models of star-shaped SBS modified asphalt are established in accordance with the apparent viscosity values. The results show that the aging affects of star-shaped SBS modified asphalt caused by UV aging are as well as those binders subjected to the thermo-oxidative aging. The penetration values and ductility values tend to decrease as aging times increase. The apparent viscosity values of 135 ℃ grow continually with extended aging time,while non-monotonic development trends of softening point values are observed for the binders with increasing aging times. There are differences in aging reaction rates between the SBS modified asphalt binders prepared by different matrix asphalts in the process of thermo-oxidative aging. However,the rates are almost the same for the two SBS modified asphalt binders in the UV aging process. The thermo-oxidative aging and the UV aging of the SBS modified asphalt can be characterized by the first-order oxidation reaction equation,and the established aging models can estimate the apparent viscosity values of star-shaped SBS modified asphalt binders subjected to the coupled effects of the thermo-oxidative aging and the UV aging.

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备注/Memo

备注/Memo:
收稿日期:2018-08-06 修回日期:2018-12-15
基金项目:中国博士后科学基金(2016M600757); 国家自然科学基金(51578076); 陕西省交建集团科研项目(18-12)
作者简介:徐鸥明(1979-),男,博士,副教授,主要研究方向:道路工程材料,E-mail:xuouming@yahoo.com。
引文格式:徐鸥明,曹志飞,李明月,等. 星型SBS改性沥青热氧和紫外光老化特性研究[J]. 南京理工大学学报,2019,43(5):660-666.
投稿网址:http://zrxuebao.njust.edu.cn
更新日期/Last Update: 2019-11-30