Study on fusion diffusion characteristics of bio-based rejuvenator-asphalt at micro scale

TANG Wen; LI Yue; GUO Yingjun; LYU Yuejing

doi:10.12299/jsues.21-0190

Volume 35 Issue 1

Sep. 2022

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Article Navigation > Journal of Shanghai University of Engineering Science > 2022 > 36(1): 46-54

TANG Wen, LI Yue, GUO Yingjun, LYU Yuejing. Study on fusion diffusion characteristics of bio-based rejuvenator-asphalt at micro scale[J]. Journal of Shanghai University of Engineering Science, 2022, 36(1): 46-54. doi: 10.12299/jsues.21-0190

Citation:

TANG Wen, LI Yue, GUO Yingjun, LYU Yuejing. Study on fusion diffusion characteristics of bio-based rejuvenator-asphalt at micro scale[J]. Journal of Shanghai University of Engineering Science, 2022, 36(1): 46-54. doi: 10.12299/jsues.21-0190

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Study on fusion diffusion characteristics of bio-based rejuvenator-asphalt at micro scale

doi: 10.12299/jsues.21-0190

College of Automobile and Traffic Engineering, Wuhan University of Science and Technology, Wuhan 430065, China

Received Date: 2021-09-18
Publish Date: 2022-09-26

Abstract

Abstract

The molecular dynamics method was used to construct the bio-based rejuvenator-asphalt model, and the fusion diffusion behavior of bio-based rejuvenator-asphalt was investigated by microscopic simulation. Firstly, the FTIR test combined with the SARA model was used to determine the molecular structure of 12 kinds of asphalt before and after aging. And the main components of animal waste bio-based rejuvenators including steroids and carboxylic acids were selected to establish the molecular dynamics model of the asphalt-rejuvenator diffusion system. Furthermore, the density and compatibility index were used to verify the reliability of the molecular dynamics model, and the fusion diffusion behavior of bio-based rejuvenator in virgin asphalt and aged asphalt were analyzed under different temperatures and aging conditions . The results show that the diffusion coefficients of bio-based rejuvenator in aged asphalt is higher than that in virgin asphalt. The diffusion performance of steroids is better than carboxylic acids at the same temperature. The diffusion coefficients of two bio-based rejuvenators increase with the increase of temperature, since the greater kinetic energy at high temperature makes it easier for the system molecules to get rid of the constraint of molecular force.
- aged asphalt,
- molecular dynamics,
- bio-based rejuvenator,
- diffusion coefficient,
- temperature

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References(18)

References

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