Study of the Cold Curing Characteristics of Isocyanate-Modified Asphalt
Isocyanate esters are widely recognized for their superior curing capabilities. Leveraging this attribute, the current research formulated a modified cold-mixed asphalt blend using 4,4′-methylene diphenyl diisocyanate (MDI). Tests and analyses of the MDI-modified asphalt with varying inclusion perce...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-02-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/17/5/1048 |
| _version_ | 1797264266605101056 |
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| author | Changhong Zhou Mingli Peng Xue Yang Yating Qi Bin Xu |
| author_facet | Changhong Zhou Mingli Peng Xue Yang Yating Qi Bin Xu |
| author_sort | Changhong Zhou |
| collection | DOAJ |
| description | Isocyanate esters are widely recognized for their superior curing capabilities. Leveraging this attribute, the current research formulated a modified cold-mixed asphalt blend using 4,4′-methylene diphenyl diisocyanate (MDI). Tests and analyses of the MDI-modified asphalt with varying inclusion percentages of MDI revealed that a mixture containing 15% rock asphalt and 15% MDI-modified asphalt exhibited a more balanced, comprehensive performance. We also conducted an examination of the role and properties of MDI in asphalt modification using molecular dynamics simulations. The cold-curing properties of MDI-modified asphalt as compared to petroleum asphalt were evaluated based on its density, free volume analysis, cohesive energy density, and glass transition temperature. Implementing the LB-13 gradation—a cold-mixed asphalt gradation with a nominal particle size of 13.2 mm recommended by Chinese specifications—we prepared MDI-modified cold-mixed asphalt and carried out analyses of its mechanical characteristics, high-temperature performance, and water damage resistance. The results demonstrated that MDI-modified asphalt showcases excellent ductility, flexibility, and aging resistance, surpassing the performance of petroleum asphalt. The stability, high-temperature rutting, and water damage resistance of the MDI-modified cold-mixed asphalt exceeded the requirements for hot-mixed asphalt. This research provides theoretical and experimental support for isocyanate ester applications in asphalt engineering, presenting significant value for practical engineering applications. |
| first_indexed | 2024-04-25T00:26:10Z |
| format | Article |
| id | doaj.art-f385cc362f0543268d6fe4bc78a177bc |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-25T00:26:10Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-f385cc362f0543268d6fe4bc78a177bc2024-03-12T16:49:04ZengMDPI AGMaterials1996-19442024-02-01175104810.3390/ma17051048Study of the Cold Curing Characteristics of Isocyanate-Modified AsphaltChanghong Zhou0Mingli Peng1Xue Yang2Yating Qi3Bin Xu4School of Architecture and Transportation Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaSchool of Architecture and Transportation Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaSchool of Civil Engineering, Hebei University of Architecture, Zhangjiakou 075000, ChinaSchool of Transportation and Logistics, Dalian University of Technology, Dalian 116024, ChinaSchool of Architecture and Transportation Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaIsocyanate esters are widely recognized for their superior curing capabilities. Leveraging this attribute, the current research formulated a modified cold-mixed asphalt blend using 4,4′-methylene diphenyl diisocyanate (MDI). Tests and analyses of the MDI-modified asphalt with varying inclusion percentages of MDI revealed that a mixture containing 15% rock asphalt and 15% MDI-modified asphalt exhibited a more balanced, comprehensive performance. We also conducted an examination of the role and properties of MDI in asphalt modification using molecular dynamics simulations. The cold-curing properties of MDI-modified asphalt as compared to petroleum asphalt were evaluated based on its density, free volume analysis, cohesive energy density, and glass transition temperature. Implementing the LB-13 gradation—a cold-mixed asphalt gradation with a nominal particle size of 13.2 mm recommended by Chinese specifications—we prepared MDI-modified cold-mixed asphalt and carried out analyses of its mechanical characteristics, high-temperature performance, and water damage resistance. The results demonstrated that MDI-modified asphalt showcases excellent ductility, flexibility, and aging resistance, surpassing the performance of petroleum asphalt. The stability, high-temperature rutting, and water damage resistance of the MDI-modified cold-mixed asphalt exceeded the requirements for hot-mixed asphalt. This research provides theoretical and experimental support for isocyanate ester applications in asphalt engineering, presenting significant value for practical engineering applications.https://www.mdpi.com/1996-1944/17/5/1048asphalt mixtureisocyanatescold curingmolecular dynamics simulation |
| spellingShingle | Changhong Zhou Mingli Peng Xue Yang Yating Qi Bin Xu Study of the Cold Curing Characteristics of Isocyanate-Modified Asphalt Materials asphalt mixture isocyanates cold curing molecular dynamics simulation |
| title | Study of the Cold Curing Characteristics of Isocyanate-Modified Asphalt |
| title_full | Study of the Cold Curing Characteristics of Isocyanate-Modified Asphalt |
| title_fullStr | Study of the Cold Curing Characteristics of Isocyanate-Modified Asphalt |
| title_full_unstemmed | Study of the Cold Curing Characteristics of Isocyanate-Modified Asphalt |
| title_short | Study of the Cold Curing Characteristics of Isocyanate-Modified Asphalt |
| title_sort | study of the cold curing characteristics of isocyanate modified asphalt |
| topic | asphalt mixture isocyanates cold curing molecular dynamics simulation |
| url | https://www.mdpi.com/1996-1944/17/5/1048 |
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