Microscopic Analysis of the Rejuvenation Mechanism and Rejuvenation Effect of Asphalt Binders
This study investigates the rejuvenation mechanism of asphalt binders at the microscopic level and compares the rejuvenation effects of rejuvenators. A model of rejuvenated asphalt was established on the basis of molecular simulation by adding different doses of two rejuvenators to the aged asphalt....
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/1958968 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849308936498315264 |
|---|---|
| author | Ke Shan Chonghao Bao Dandan Li Chuanfeng Zheng |
| author_facet | Ke Shan Chonghao Bao Dandan Li Chuanfeng Zheng |
| author_sort | Ke Shan |
| collection | DOAJ |
| description | This study investigates the rejuvenation mechanism of asphalt binders at the microscopic level and compares the rejuvenation effects of rejuvenators. A model of rejuvenated asphalt was established on the basis of molecular simulation by adding different doses of two rejuvenators to the aged asphalt. This model was validated in terms of density and surface free energy. The diffusion ability of the rejuvenator was investigated by using a diffusion model and mean square displacement. The deagglomeration ability of rejuvenators on asphaltene was explored by using a radial distribution function. The microscopic mechanism of asphalt rejuvenation was explained. Results show that small molecule structures are more diffusible than long-chain structures, and aromatic ring structures are more attracted than polar functional groups. The rejuvenating effect of the rejuvenator was evaluated in terms of viscosity and cohesive energy density. Results show that the long-chain structure reduces the viscosity value more than the small molecule structure. The aromatic ring structure in the aged asphalt helps to restore the compatibility between the fractions. This study serves as a guide for the selection and development of future rejuvenators. |
| format | Article |
| id | doaj-art-0b9bcaf2e8e84a81a82436b69567ee80 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-0b9bcaf2e8e84a81a82436b69567ee802025-08-20T03:54:19ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422021-01-01202110.1155/2021/19589681958968Microscopic Analysis of the Rejuvenation Mechanism and Rejuvenation Effect of Asphalt BindersKe Shan0Chonghao Bao1Dandan Li2Chuanfeng Zheng3Jilin University of Architecture and Technology, Changchun, Jilin 130114, ChinaCollege of Construction Engineering, Jilin University, Changchun, Jilin 130026, ChinaJilin University of Architecture and Technology, Changchun, Jilin 130114, ChinaCollege of Transportation, Jilin University, Changchun, Jilin 130025, ChinaThis study investigates the rejuvenation mechanism of asphalt binders at the microscopic level and compares the rejuvenation effects of rejuvenators. A model of rejuvenated asphalt was established on the basis of molecular simulation by adding different doses of two rejuvenators to the aged asphalt. This model was validated in terms of density and surface free energy. The diffusion ability of the rejuvenator was investigated by using a diffusion model and mean square displacement. The deagglomeration ability of rejuvenators on asphaltene was explored by using a radial distribution function. The microscopic mechanism of asphalt rejuvenation was explained. Results show that small molecule structures are more diffusible than long-chain structures, and aromatic ring structures are more attracted than polar functional groups. The rejuvenating effect of the rejuvenator was evaluated in terms of viscosity and cohesive energy density. Results show that the long-chain structure reduces the viscosity value more than the small molecule structure. The aromatic ring structure in the aged asphalt helps to restore the compatibility between the fractions. This study serves as a guide for the selection and development of future rejuvenators.http://dx.doi.org/10.1155/2021/1958968 |
| spellingShingle | Ke Shan Chonghao Bao Dandan Li Chuanfeng Zheng Microscopic Analysis of the Rejuvenation Mechanism and Rejuvenation Effect of Asphalt Binders Advances in Materials Science and Engineering |
| title | Microscopic Analysis of the Rejuvenation Mechanism and Rejuvenation Effect of Asphalt Binders |
| title_full | Microscopic Analysis of the Rejuvenation Mechanism and Rejuvenation Effect of Asphalt Binders |
| title_fullStr | Microscopic Analysis of the Rejuvenation Mechanism and Rejuvenation Effect of Asphalt Binders |
| title_full_unstemmed | Microscopic Analysis of the Rejuvenation Mechanism and Rejuvenation Effect of Asphalt Binders |
| title_short | Microscopic Analysis of the Rejuvenation Mechanism and Rejuvenation Effect of Asphalt Binders |
| title_sort | microscopic analysis of the rejuvenation mechanism and rejuvenation effect of asphalt binders |
| url | http://dx.doi.org/10.1155/2021/1958968 |
| work_keys_str_mv | AT keshan microscopicanalysisoftherejuvenationmechanismandrejuvenationeffectofasphaltbinders AT chonghaobao microscopicanalysisoftherejuvenationmechanismandrejuvenationeffectofasphaltbinders AT dandanli microscopicanalysisoftherejuvenationmechanismandrejuvenationeffectofasphaltbinders AT chuanfengzheng microscopicanalysisoftherejuvenationmechanismandrejuvenationeffectofasphaltbinders |