[1]栗培龙,张争奇,王秉纲..沥青紫外光老化特性及机理探讨[J].郑州大学学报(工学版),2008,29(04):96-100.[doi:10.3969/j.issn.1671-6833.2008.04.023]
　Li Peilong,ZHANG Zhengqi,Wang Binggang.Discussion on the aging characteristics and mechanism of asphalt ultraviolet light[J].Journal of Zhengzhou University (Engineering Science),2008,29(04):96-100.[doi:10.3969/j.issn.1671-6833.2008.04.023]
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沥青紫外光老化特性及机理探讨()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
29
期数:
2008年04期
页码:
96-100
栏目:
出版日期:
1900-01-01

文章信息/Info

Title:
Discussion on the aging characteristics and mechanism of asphalt ultraviolet light
作者:
栗培龙; 张争奇; 王秉纲.
长安大学特殊地区公路工程教育部重点实验室,陕西,西安,710064, 长安大学特殊地区公路工程教育部重点实验室,陕西,西安,710064, 长安大学特殊地区公路工程教育部重点实验室,陕西,西安,710064
Author(s):
Li Peilong; ZHANG Zhengqi; Wang Binggang
关键词:
道路工程;  紫外光老化;  性能;  微观分析;  老化机理
Keywords:
DOI:
10.3969/j.issn.1671-6833.2008.04.023
文献标志码:
A
摘要:
为了研究沥青紫外光老化行为及机理,采用两种沥青进行室内模拟光老化试验.通过对沥青不同老化时间的黏度和延度时比分析,研究了沥青紫外光老化的高低温性能衰变行为,并采用组分试验、胶体结构以及红外光谱(IR)分析,探讨了其微观变化及老化机理.结果表明,紫外光老化主要发生在沥青表面,导致沥青的低温性能大幅衰减.对高温性能的影响相对较小;沥青中的芳香分和胶质对紫外光较为敏感.容易发生光氧化反应生成沥青质,胶体不稳定指数和相对羰基指数均不断增大,沥青性能不断劣化.
Abstract:
In order to study the behavior and mechanism of asphalt ultraviolet aging, two kinds of bitumen were used for indoor simulated photoaging test. Through the analysis of viscosity and ductility time ratio of bitumen at different aging times, the decay behavior of high and low temperature performance of asphalt UV aging was studied, and the microscopic changes and aging mechanism were discussed by component test, colloidal structure and infrared spectroscopy(IR) analysis. The results show that UV aging mainly occurs on the surface of asphalt, resulting in a significant attenuation of the low temperature performance of asphalt. The effect on high temperature performance is relatively small; The aromatic components and gums in bitumen are sensitive to ultraviolet light. It is easy to generate asphaltenes by photooxidation reaction, the colloidal instability index and relative carbonyl index are increasing, and the asphalt properties are constantly deteriorating.

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更新日期/Last Update: 1900-01-01