中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2022, Vol. 41 ›› Issue (06): 92-97.DOI: 10.3969/j.issn.1674-0696.2022.06.14

• 交通基础设施工程 • 上一篇    下一篇

生物再生剂对老化沥青分子聚集行为的影响

汤文,郭颖君,吕悦晶,陈华   

  1. (武汉科技大学 汽车与交通工程学院,湖北 武汉 430065)
  • 收稿日期:2020-08-24 修回日期:2020-12-25 发布日期:2022-06-22
  • 作者简介:汤 文(1982—),男,湖北孝感人,副教授,博士,主要从事沥青路面材料方面的研究。E-mail:tangwen@wust.edu.cn
  • 基金资助:
    国家自然科学基金项目(51508428)

Influence of Biological Rejuvenator on Molecular Agglomeration Behavior of Aged Asphalt

TANG Wen, GUO Yingjun, LYU Yuejing, CHEN Hua   

  1. (School of Automobile and Traffic Engineering, Wuhan University of Science and Technology, Wuhan 430065, Hubei, China)
  • Received:2020-08-24 Revised:2020-12-25 Published:2022-06-22

摘要: 采用傅里叶红外光谱(ATR-FTIR)试验分析了沥青老化过程中的官能团变化,建立了老化沥青12分子模型;加入类固醇和羧酸构建两种老化沥青-再生剂分子动力学模型,计算了不同温度下沥青质的质心径向分布函数(radial distribution function),进而研究其聚集行为。研究结果表明:随着温度升高,沥青质分子的聚集程度逐渐降低;两种生物再生剂在低温下加剧了沥青质聚集,常温下均具有较好的解聚集效果,且类固醇性能优于羧酸,高温条件下其解聚集效果减弱;两种再生剂在常温下的最佳掺量均为10%。

关键词: 道路工程;老化沥青;分子动力学;再生剂;分子聚集

Abstract: The 12-molecule model of the aged asphalt was established based on analyzing the functional groups changes in the aging process of asphalt by ATR-FTIR. Two kinds of aging asphalt-regenerant molecular dynamics models were constructed by adding steroids and carboxylic acids. The radial distribution function of asphaltene centroids at different temperatures was calculated, and then its aggregation behavior was investigated. The results show that the aggregation degree of asphaltene molecules decreases with the increment of temperature. Both rejuvenators exhibit better deagglomeration performance at ordinary temperature, and the performance of steroid is better than that of carboxylic acid. The deagglomeration effect is weakened at high temperature. And the optimal dosage of both two rejuvenators is 10% at ordinary temperature.

Key words: highway engineering; aged asphalt; molecular dynamics; rejuvenator; molecular aggregation

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