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Bio-Asphalt Diffusion Properties Based on Molecular Dynamics Simulation
ID：2015 View Protection：ATTENDEE Updated Time：2021-12-03 15:01:43 Hits：260 Poster Presentation

Start Time：2021-12-17 09:20（Asia/Shanghai）

Duration：1min

Session：P2 Poster2021 » P2T4Track 4 Transportation Behavior, Safety and Security

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Abstract
The diffusion efficiency of rejuvenator in aged asphalt is an important indicator to evaluate the quality of rejuvenator. In this study, hexadecanamide was selected as a representative molecular structure of bio-rejuvenators. Based on the weight ratio of each component and the number of aged groups, three asphalt binder models were constructed for different aging states. The RDF function was used as an important approach to analyze the states of molecular agglomerations in virgin and aged asphalt binder. To calculate the diffusion coefficient of asphalt reasonably, the asphalt-aggregate diffusion model was constructed in diffusion planes from different directions. The influence of temperature on this process was also considered. The average diffusion coefficient of aged asphalt at the aggregate model surface was lower than that of virgin asphalt. However, under the influence of hexadecanamide, the average diffusion coefficient of aged asphalt showed an increasing trend.
Keywords
CICTP;molecular dynamics;asphalt binder;Diffusion
Speaker
Heyang Ding
Chang'an University

Heyang Ding received his B.E. degree in civil engineering from Anhui University of Science & Technology (AUST) in Sep. 2015 ~ Jan. 2019. He is currently a M. E. candidate of Chang’an University under supervision of Prof. Hainian Wang and Dr. Xin Qu. His research focus on detection and numerical simulation of asphalt binder microstructure.
丁鹤洋，2019年毕业于安徽理工大学，获得工学学士学位。现为长安大学硕士研究生，指导教师为汪海年教授和屈鑫博士。主要研究方向为沥青微观结构探测与数值模拟。

Submission Author
Heyang Ding Chang'an University
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Important Date

  • Conference Date

    Dec 17

    2021

    to

    Dec 20

    2021

  • Dec 16 2021

    Contribution Submission Deadline

  • Dec 24 2021

    Registration deadline

Sponsored By
Chinese Overseas Transportation Association
Chang'an University
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