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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） ›› 2016, Vol. 35 ›› Issue (6): 38-44.DOI: 10.3969/j.issn.16740696.2016.06.09

• 道路与铁道工程 • 上一篇    下一篇

光热耦合条件下沥青宏观老化特征研究

陈龙1，陈松敏2，何兆益1   

  1. （1.重庆交通大学 土木工程学院，重庆 400074；2.中国人民解放军95996部队，北京 100086）
  • 收稿日期:2015-09-15 修回日期:2015-12-10 出版日期:2016-12-25 发布日期:2016-12-29
  • 作者简介:陈龙（1989—），男，河南开封人，博士研究生，主要从事路基路面材料与结构方面的研究。Email：hellolong0701@163.com。
  • 基金资助:
    国家自然科学基金项目（51278513）

Macro Aging Characteristics of Asphalt under Heat and Light Coupling Condition

CHEN Long1, CHEN Songmin2, HE Zhaoyi1   

  1. (1.Shool of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, P.R.China; 2. People’s Liberation Army 95996 Troop, Beijing 100086, P.R.China)
  • Received:2015-09-15 Revised:2015-12-10 Online:2016-12-25 Published:2016-12-29

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摘要： 通过对两种基质沥青及四种改性沥青的技术性能指标（针入度、黏度、软化点、车辙因子）进行室内试验，对比了不同光热耦合条件下沥青的宏观老化特征。研究表明：对于基质沥青而言，光照强度不变时，ZH沥青的抗热老化性能明显优于SK沥青；温度不变时，SK沥青的抗光老化性能则明显优于ZH沥青；对于改性沥青而言，线型改性沥青抗光热耦合老化能力整体上优于星型改性沥青；单因素和双因素变化时，各类沥青在以针入度比为指标表征其抗老化性能方面有较强的关联性，在以黏度比、软化点比及剪切流变系数为指标表征其抗老化性能方面关联性不大，推荐采用针入度比作为评价沥青的老化程度及抗老化性能；其中，双因素方差分析结果表明沥青光热耦合作用时温度比光照强度作用更加显著。

关键词: 道路工程, 技术指标, 基质沥青, 改性剂, 老化特征

Abstract: Through the indoor experiments on several technical performance indicators (including penetration, viscosity, softening point, rutting factor) of two kinds of matrix asphalt and four kinds of modified asphalt, the macro aging characteristics under different coupling condition of heat and light were compared. The results show that: for matrix asphalt, the antithermal aging performance of ZH asphalt is obviously superior to that of SK asphalt when the light intensity is constant; the antilight aging performance of SK asphalt is obviously superior to that of ZH asphalt when the temperature is constant. For the modified asphalt, the ability of linear modified asphalt to resist heat and light coupling is better than that of star type modified asphalt. When the single factor and couple factors change, the matrix asphalt and the modified asphalt have a strong correlation with antiaging properties which is reflected by penetration ratio; in addition, there is minor correlation with antiaging properties which are reflected by viscosity ratio, softening point ratio and shear rheology coefficient. Therefore, penetration ratio is recommended for the index to evaluate the aging degree of asphalt and antiaging properties. The variance analysis results of couple factors show that the temperature is more significant than light intensity in the light and heat coupling effect.

Key words: highway engineering, technical indicators, matrix asphalt, modifier, aging characteristics

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