炼油技术与工程 ›› 2022, Vol. 52 ›› Issue (1): 59-64.

• 油品与添加剂 • 上一篇    

沥青老化过程中组分与微观形貌演变研究

赵泽鹏1,李源1,李梦园2,韩小勇3,陈晓博3   

  1. 1.中国石油天然气股份有限公司独山子石化公司研究院，新疆 克拉玛依 833699； 2.长安大学材料科学与工程学院，陕西省西安市 710064;  3.中国石油天然气股份有限公司独山子石化公司乙烯厂，新疆 独山子 833699
  • 收稿日期:2021-11-18 出版日期:2022-01-15 发布日期:2022-01-18
  • 作者简介:赵泽鹏，高级工程师，主要从事高分子材料加工与改性方法的研究工作。E-mail：yjy_zzp@petrochina.com.cn。

Study on variation of asphalt components and microstructure during aging

Zhao Zepeng1, Li Yuan1, Li Mengyuan2, Han Xiaoyong3, Chen Xiaobo3   

  1. 1.Research Institute of Dushanzi Petrochemical Company, Karamay, Xinjiang 833699;  2.School of Material Science and Engineering, Chang’an University, Xi’an, Shaanxi 710064;  3.Ethylene plant of PetroChina Dushanzi Petrochemical Company, Dushanzi, Xinjiang 834021
  • Received:2021-11-18 Online:2022-01-15 Published:2022-01-18

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摘要： 为了探索沥青老化过程中组分与微观形貌的演变趋势，以5种不同油源的基质沥青为研究对象，对其进行薄膜烘箱老化试验和压力老化试验。随后对各沥青样品进行组分分离试验，并采用原子力显微镜对其微观形貌进行观测分析。结果表明：沥青老化过程中轻质组分向重质组分迁移，胶体指数呈下降趋势，且重质组分含量多的沥青组分变化较小；沥青表面微观形貌中的“蜂状结构”变得模糊，且表面粗糙度以及凸起部位最大高度下降。此外，胶体指数的下降也使得沥青更趋于凝胶结构，皮尔逊相关系数分析表明了沥青老化过程中组分的变化率与微观形貌的演变存在较强的正相关性，即组分指数变化率越大，微观形貌参数变化率也相应越大。

关键词: 沥青老化, 组分, 微观形貌, 胶体指数, 原子力显微镜, 蜂状结构, 皮尔逊相关系数

Abstract: In order to investigate the evolution trend of components and micro morphology during asphalt aging, five kinds of base asphalt with different oil sources were studied by thin film oven aging test (TFOT) and pressure aging test (PAV). Then, the component separation test of each asphalt sample was carried out, and its micro morphology was analyzed by atomic force microscope (AFM). The results showed that the light components migrate to the heavy components and the colloidal index decreased during the aging process of asphalt. Moreover, the asphalt components with more heavy components change less. The “bee structure” in the micro morphology of asphalt surface became blurred, the surface roughness and the maximum height of convex parts decreased either. In addition, the decrease of colloid index also made the asphalt easy to be gel structure. Pearson correlation coefficient analysis showed that there was a strong positive correlation between the change rate of components and the evolution of micro morphology in the aging process of asphalt, that is, the higher the compositions index change rate is, the higher the micromorphology parameter change rate is.

Key words: asphalt aging, compositions, micro morphology, colloidal index, atomic force microscope, bee structure, Pearson correlation coefficient