中国炼油与石油化工 ›› 2022, Vol. 24 ›› Issue (1): 36-47.

• Scientific Research • 上一篇    下一篇

Study on the low-temperature properties of the asphalt modified by carbon nanotubes (CNTs) and crumb rubber (CR)

刘玉梅1,郑木莲1,刘侠2,王崇涛3,程勇2,王可2   

  1. 1. 长安大学公路学院
    2. Jining Hongxiang Highway Survey, Design and Research Institute Co., LTD
    3. First Highway Consultants Co Ltd
  • 收稿日期:2021-06-09 修回日期:2022-01-08 出版日期:2022-03-30 发布日期:2022-03-30
  • 通讯作者: 郑木莲 E-mail:zhengmulian@163.com
  • 基金资助:
    国家自然科学基金;山东省工业和信息化厅科技创新项目;山东省交通运输厅;陕西省西咸新区管委会交通科技项目;珠海交通集团有限公司科技项目

Study on the low-temperature properties of the asphalt modified by carbon nanotubes (CNTs) and crumb rubber (CR)

  • Received:2021-06-09 Revised:2022-01-08 Online:2022-03-30 Published:2022-03-30
  • Contact: Mulian Zheng E-mail:zhengmulian@163.com
  • Supported by:
    National Natural Science Foundation of China;Technology Innovation Project of Shandong Department of Industry and Information;Transportation Department of Shandong Province;Traffic Science and Technology Project of Xixian New District Management Committee of Shaanxi Province;Zhuhai Transportation Group Co. LTD

摘要: The effect of adding crumb rubber (CR) and carbon nanotubes (CNTs) on the low-temperature properties of virgin asphalt was studied. Using the force-ductility test and the bending beam rheometer (BBR) test, the deformation resistance and rheological properties of asphalt samples at low temperatures were evaluated, respectively. Based on the result of BBR test, the creep functions of the Burgers model and the Zener model were used to fit the low-temperature creep characteristics of the asphalt samples. Furthermore, the differential scanning calorimetry (DSC) test and the attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) test were utilized to appraise the low-temperature stability and chemical properties of asphalt samples, respectively. The results showed that CR significantly improved the lowtemperature properties of virgin asphalt, while CNTs had little effect. Moreover, during the degradation of CR, aromatic and aliphatic components were released. In particular, the aliphatic components of CR-modified asphalt were much higher than those of virgin asphalt, which had a significant effect on improving the low-temperature properties of the asphalt. The DSC test results showed that CR enhanced the low-temperature stability of the asphalt, while the addition of CNTs presented a slightly negative effect.

关键词: Low-temperature properties, Crumb rubber (CR), Carbon nanotubes (CNTs), Creep characteristic, Asphalt components

Abstract: The effect of adding crumb rubber (CR) and carbon nanotubes (CNTs) on the low-temperature properties of virgin asphalt was studied. Using the force-ductility test and the bending beam rheometer (BBR) test, the deformation resistance and rheological properties of asphalt samples at low temperatures were evaluated, respectively. Based on the result of BBR test, the creep functions of the Burgers model and the Zener model were used to fit the low-temperature creep characteristics of the asphalt samples. Furthermore, the differential scanning calorimetry (DSC) test and the attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) test were utilized to appraise the low-temperature stability and chemical properties of asphalt samples, respectively. The results showed that CR significantly improved the lowtemperature properties of virgin asphalt, while CNTs had little effect. Moreover, during the degradation of CR, aromatic and aliphatic components were released. In particular, the aliphatic components of CR-modified asphalt were much higher than those of virgin asphalt, which had a significant effect on improving the low-temperature properties of the asphalt. The DSC test results showed that CR enhanced the low-temperature stability of the asphalt, while the addition of CNTs presented a slightly negative effect.

Key words: Low-temperature properties, Crumb rubber (CR), Carbon nanotubes (CNTs), Creep characteristic, Asphalt components