Evaluation of Interface Diffusion Behavior Between Rejuvenator and Aged Asphalt Based on Surface Wettability Theory

被引：0
|
作者：
Kuang D.-L. [1 ]
Liu W.-C. [1 ]
Zhang Y. [2 ]
Zhang H.-G. [3 ]
Cao D.-W. [4 ,5 ]
机构：
[1] School of Materials Science and Engineering, Chang'an University, Xi'an, 710064, Shaanxi
[2] Jinhua Highway Administration Bureau, Jinhua, 321000, Zhejiang
[3] Guangxi Transportation Science and Technology Co. Ltd., Nanning, 530007, Guangxi
[4] Research and Development Center of Transport Industry of New Materials, Technologies Application for Highway Construction and Maintenance, Beijing
[5] Zhonglu Gaoke (Beijing) Highway Technology Co. Ltd., Beijing
来源：
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | 2020年 / 33卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Contact angle; Interface between rejuvenator and aged asphalt; Rejuvenated asphalt; Road engineering; Wetting process; Wilhelmy pendant method;
D O I：
10.19721/j.cnki.1001-7372.2020.07.006
中图分类号：
学科分类号：
摘要：
To study the interface diffusion behavior between rejuvenator and aged asphalt and its influencing factors, the surface tension of the rejuvenator at different temperatures and its contact angle with the aging asphalt was tested using Wilhelmy pendant method. The thermodynamic parameters-wetting work and kinetic parameters-wetting speed (wetting time) during the wetting process were calculated. Based on this, the effects of the regenerator's properties, environmental temperature, and aging degree of asphalt on the interface diffusion behavior were studied. The results show that the incorporation of epoxy soybean oil (ESO) reduces the contact angle of the rejuvenator, increases the wetting work, accelerates the wetting speed, shortens the wetting time, improves the wetting performance of the rejuvenator on aged asphalt, and promotes the interfacial diffusion between rejuvenator and aging asphalt. Moreover, the incorporation of dodecyl benzene sulfonic acid (DBSA) adversely affect the interfacial diffusion of the regenerant. Temperature has a significant effect on the interface diffusion behavior; as the temperature increases, the viscosity of the rejuvenator decreases, the contact angle decreases, and the wetting speed is accelerated. The rejuvenator can fully wrap the surface of aged asphalt in a short time. The higher the surface tension of the rejuvenator, the higher the wetting work on the surface of the aging asphalt, and the higher the interface diffusion power, the easier the diffusion process to proceed. The smaller the contact angle of rejuvenator on the surface of aged asphalt, the higher the wetting speed on the surface of the aging asphalt, and the easier it is for the rejuvenator droplets to form a film of rejuvenator that covers the aged asphalt surface. The lower the viscosity of the rejuvenator, the better the fluidity. It has a higher wetting speed on the surface of aged asphalt, which is beneficial to the interface diffusion between rejuvenator and aged asphalt. The aging of asphalt is detrimental to the interface diffusion between rejuvenator and aged asphalt. With the increase in the aging degree of asphalt, the wettability of rejuvenator on the surface of asphalt decreases, which reduces the degree of interface diffusion. Therefore, to ensure the effect of the rejuvenator on the aged asphalt, it is necessary to select a rejuvenator with higher surface tension, lower viscosity, and smaller contact angle with the aged asphalt when developing the rejuvenator. © 2020, Editorial Department of China Journal of Highway and Transport. All right reserved.
引用
收藏
页码：58 / 67
页数：9
相关论文
共 24 条
  • [1] XU Jian, HUANG Song-chang, ZOU Gui-lian, Recycling Technology of Asphalt Pavement for Asphalt Pavement for Highway, (2011)
  • [2] HE Zhao-yi, CHEN Long, CHEN Xian-yong, Et al., Mechanical Properties and Application Research of Hot Recycled Asphalt Mixture from Central Mixing Plant, Journal of Building Materials, 19, 5, pp. 871-875, (2016)
  • [3] WANG Xue-lian, HU Lin, HUANG Xiao-ming, Research on Key Technologies of Hot Mixing Recycling Process of Asphalt Pavement Factory, Journal of China & Foreign Highway, 39, 1, pp. 210-214, (2019)
  • [4] QI Wen-yang, LI Li-han, HUANG Yi, Et al., Evaluation and Influencing Factors on Diffusion Degree of Asphalt Rejuvenator, Journal of Building Materials, 17, 6, pp. 1020-1024, (2014)
  • [5] SUN D, SUN G, ZHU X, Et al., Identification of Wetting and Molecular Diffusion Stages During Self-healing Process of Asphalt Binder via Fluorescence Microscope, Construction and Building Materials, 132, FEB. 1, pp. 230-239, (2017)
  • [6] XU Ying, JI Jie, ZHANG Ke-dong, Measurement method of Blending Status Between Virgin and Aged Binder in Recycled Asphalt Mixtures-A Literature Review, Highway Engineering, 41, 1, pp. 1-5, (2016)
  • [7] WEI Wan-feng, GUO Peng, TANG Bo-ming, Review on the Research of the New-old Asphalt Diffusion Mixing Efficiency of Recycled Asphalt Mixture, Materials Reports, 31, 11, pp. 109-114, (2017)
  • [8] MENG Jian-wei, Study on Preparation and Road Performance of Asphalt Mixture Rejuvenator, (2017)
  • [9] XU Meng, Study on Diffusion of Rejuvenator in Aged Asphalt, (2010)
  • [10] XIAO Qing-yi, ZHANG Meng-qi, ZHANG Jing-jie, Study on the Osmotic Regeneration Mechanism of Rejuvenator and Its Influencing Factors, Journal of Hebei University of Technology, 46, 4, pp. 85-91, (2017)
123