A Multiscale Study of Moisture Influence on the Crumb Rubber Asphalt Mixture Interface
In order to study the influence of moisture on the interface of crumb rubber–asphalt (CR) mixture, the interface bonding performance and crack resistance of a crumb rubber–asphalt mixture under dry and wet conditions were studied at three scales. At the macroscale, the characteristics of medium temp...
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MDPI AG
2022-07-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/14/6940 |
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| author | Lan Wang Yang Liu Le Zhang |
| author_facet | Lan Wang Yang Liu Le Zhang |
| author_sort | Lan Wang |
| collection | DOAJ |
| description | In order to study the influence of moisture on the interface of crumb rubber–asphalt (CR) mixture, the interface bonding performance and crack resistance of a crumb rubber–asphalt mixture under dry and wet conditions were studied at three scales. At the macroscale, the characteristics of medium temperature fatigue cracking and low temperature fracture were studied by semi-circular bending tensile test (SCB) on the example of digital image correlation (DIC) technique. At the microscale, the surface energy of CR with basalt and limestone was measured using the contact angle measurement test, and then the adhesion work was calculated and analyzed. At the molecular scale, the model of CR, the model of basalt representative mineral (augite) and limestone representative mineral (calcite) were studied by molecular dynamics simulation. The relationship between these three scales was further explored to reveal the mechanism of the damage of moisture on the interface deterioration of the CR mixture. The results show that moisture has a certain effect on the interface of the CR mixture, which is characterized by macroscopically reducing the crack resistance of the asphalt mixture, microscopically reducing the adhesion ability between the asphalt and the aggregate and weakening the interaction between the asphalt and aggregate molecules at the molecular scale. Molecular dynamics can accurately simulate the deterioration of micro asphalt-aggregate adhesion under the damage of moisture. The decrease in microadhesion leads to the decrease in the crack resistance of the macro-CR mixture. |
| first_indexed | 2024-03-09T03:45:31Z |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T03:45:31Z |
| publishDate | 2022-07-01 |
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| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-72c01c8af9ef4e808313398762bd796a2023-12-03T14:35:23ZengMDPI AGApplied Sciences2076-34172022-07-011214694010.3390/app12146940A Multiscale Study of Moisture Influence on the Crumb Rubber Asphalt Mixture InterfaceLan Wang0Yang Liu1Le Zhang2School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaCollege of Science, Inner Mongolia University of Technology, Hohhot 010051, ChinaCollege of Science, Inner Mongolia University of Technology, Hohhot 010051, ChinaIn order to study the influence of moisture on the interface of crumb rubber–asphalt (CR) mixture, the interface bonding performance and crack resistance of a crumb rubber–asphalt mixture under dry and wet conditions were studied at three scales. At the macroscale, the characteristics of medium temperature fatigue cracking and low temperature fracture were studied by semi-circular bending tensile test (SCB) on the example of digital image correlation (DIC) technique. At the microscale, the surface energy of CR with basalt and limestone was measured using the contact angle measurement test, and then the adhesion work was calculated and analyzed. At the molecular scale, the model of CR, the model of basalt representative mineral (augite) and limestone representative mineral (calcite) were studied by molecular dynamics simulation. The relationship between these three scales was further explored to reveal the mechanism of the damage of moisture on the interface deterioration of the CR mixture. The results show that moisture has a certain effect on the interface of the CR mixture, which is characterized by macroscopically reducing the crack resistance of the asphalt mixture, microscopically reducing the adhesion ability between the asphalt and the aggregate and weakening the interaction between the asphalt and aggregate molecules at the molecular scale. Molecular dynamics can accurately simulate the deterioration of micro asphalt-aggregate adhesion under the damage of moisture. The decrease in microadhesion leads to the decrease in the crack resistance of the macro-CR mixture.https://www.mdpi.com/2076-3417/12/14/6940moistureinterface crackingdigital image correlation (DIC)molecular dynamicscrumb rubber asphalt (CR) |
| spellingShingle | Lan Wang Yang Liu Le Zhang A Multiscale Study of Moisture Influence on the Crumb Rubber Asphalt Mixture Interface Applied Sciences moisture interface cracking digital image correlation (DIC) molecular dynamics crumb rubber asphalt (CR) |
| title | A Multiscale Study of Moisture Influence on the Crumb Rubber Asphalt Mixture Interface |
| title_full | A Multiscale Study of Moisture Influence on the Crumb Rubber Asphalt Mixture Interface |
| title_fullStr | A Multiscale Study of Moisture Influence on the Crumb Rubber Asphalt Mixture Interface |
| title_full_unstemmed | A Multiscale Study of Moisture Influence on the Crumb Rubber Asphalt Mixture Interface |
| title_short | A Multiscale Study of Moisture Influence on the Crumb Rubber Asphalt Mixture Interface |
| title_sort | multiscale study of moisture influence on the crumb rubber asphalt mixture interface |
| topic | moisture interface cracking digital image correlation (DIC) molecular dynamics crumb rubber asphalt (CR) |
| url | https://www.mdpi.com/2076-3417/12/14/6940 |
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