Evaluation of different functionalized multi-walled carbon nanotubes (MWCNTs) modified asphalts
To improve the aging resistance and prolong the service life of asphalt pavement, this study utilized modified multi-walled carbon nanotubes (MWCNTs) functionalized with carboxyl (MWCNTs-COOH), hydroxyl (MWCNTs-OH), and amino (MWCNTs-NH2) groups. These nanotubes were incorporated into SBS-modified a...
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Polish Academy of Sciences
2024-12-01
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| Series: | Archives of Civil Engineering |
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| Online Access: | https://journals.pan.pl/Content/133461/PDF/19_int_cor.pdf |
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| author | Zhongming He Jianjun Ou Tangxin Xie Fangfang Yang Yaqian Li |
| author_facet | Zhongming He Jianjun Ou Tangxin Xie Fangfang Yang Yaqian Li |
| author_sort | Zhongming He |
| collection | DOAJ |
| description | To improve the aging resistance and prolong the service life of asphalt pavement, this study utilized modified multi-walled carbon nanotubes (MWCNTs) functionalized with carboxyl (MWCNTs-COOH), hydroxyl (MWCNTs-OH), and amino (MWCNTs-NH2) groups. These nanotubes were incorporated into SBS-modified asphalt at a concentration of 1%. The study sought to examine the impact of MWCNTs and their functional groups on asphalt’s rheological and anti-aging characteristics, alongside exploring their modification mechanisms. The findings indicated that rheological tests showed that MWCNTs/SBS composite-modified asphalt, particularly MWCNTs-OH/SBS, exhibited remarkable resistance to hightemperature deformation, a crucial characteristic for asphalt performance in hot climates. Nevertheless, it is important to note that the addition of MWCNTs led to an increase in asphalt’s creep strength and creep rate, which could potentially reduce its resistance to low-temperature cracking. However, the covalent functionalization of MWCNTs mitigated these adverse effects on low-temperature performance. Moreover, the inclusion of MWCNTs in asphalt served as a barrier, impeding the penetration of oxygen molecules and ultraviolet radiation into the asphalt matrix. This proved to be an effective means of inhibiting the aging process, a critical factor in extending the service life of asphalt pavement. Among the different formulations of MWCNTs modified asphalt, the MWCNTs-OH/SBS composite-modified asphalt exhibited notably effective anti-aging properties. Both rheological and anti-aging evaluations demonstrated that hydroxyl functional groups played a pivotal role in enhancing performance, chiefly by fostering interactions with asphalt molecules. |
| format | Article |
| id | doaj-art-ac39d42b5b9f4e06a251a73fe9ff0ed4 |
| institution | DOAJ |
| issn | 1230-2945 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Civil Engineering |
| spelling | doaj-art-ac39d42b5b9f4e06a251a73fe9ff0ed42025-08-20T02:39:44ZengPolish Academy of SciencesArchives of Civil Engineering1230-29452024-12-01vol. 70No 4https://doi.org/10.24425/ace.2024.151894Evaluation of different functionalized multi-walled carbon nanotubes (MWCNTs) modified asphaltsZhongming He0https://orcid.org/0000-0002-4587-0160Jianjun Ou1https://orcid.org/0009-0003-2654-548XTangxin Xie2https://orcid.org/0009-0007-4399-2475Fangfang Yang3https://orcid.org/0009-0001-7262-6614Yaqian Li4https://orcid.org/0009-0008-9321-6543School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha, Hunan 410004, ChinaSchool of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha, Hunan 410004, ChinaSchool of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha, Hunan 410004, ChinaSchool of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha, Hunan 410004, ChinaSchool of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha, Hunan 410004, ChinaTo improve the aging resistance and prolong the service life of asphalt pavement, this study utilized modified multi-walled carbon nanotubes (MWCNTs) functionalized with carboxyl (MWCNTs-COOH), hydroxyl (MWCNTs-OH), and amino (MWCNTs-NH2) groups. These nanotubes were incorporated into SBS-modified asphalt at a concentration of 1%. The study sought to examine the impact of MWCNTs and their functional groups on asphalt’s rheological and anti-aging characteristics, alongside exploring their modification mechanisms. The findings indicated that rheological tests showed that MWCNTs/SBS composite-modified asphalt, particularly MWCNTs-OH/SBS, exhibited remarkable resistance to hightemperature deformation, a crucial characteristic for asphalt performance in hot climates. Nevertheless, it is important to note that the addition of MWCNTs led to an increase in asphalt’s creep strength and creep rate, which could potentially reduce its resistance to low-temperature cracking. However, the covalent functionalization of MWCNTs mitigated these adverse effects on low-temperature performance. Moreover, the inclusion of MWCNTs in asphalt served as a barrier, impeding the penetration of oxygen molecules and ultraviolet radiation into the asphalt matrix. This proved to be an effective means of inhibiting the aging process, a critical factor in extending the service life of asphalt pavement. Among the different formulations of MWCNTs modified asphalt, the MWCNTs-OH/SBS composite-modified asphalt exhibited notably effective anti-aging properties. Both rheological and anti-aging evaluations demonstrated that hydroxyl functional groups played a pivotal role in enhancing performance, chiefly by fostering interactions with asphalt molecules.https://journals.pan.pl/Content/133461/PDF/19_int_cor.pdfmodified asphaltmulti-walled carbon nanotubeshigh and low temperature characteristicsfatigue propertiesanti-aging performance |
| spellingShingle | Zhongming He Jianjun Ou Tangxin Xie Fangfang Yang Yaqian Li Evaluation of different functionalized multi-walled carbon nanotubes (MWCNTs) modified asphalts Archives of Civil Engineering modified asphalt multi-walled carbon nanotubes high and low temperature characteristics fatigue properties anti-aging performance |
| title | Evaluation of different functionalized multi-walled carbon nanotubes (MWCNTs) modified asphalts |
| title_full | Evaluation of different functionalized multi-walled carbon nanotubes (MWCNTs) modified asphalts |
| title_fullStr | Evaluation of different functionalized multi-walled carbon nanotubes (MWCNTs) modified asphalts |
| title_full_unstemmed | Evaluation of different functionalized multi-walled carbon nanotubes (MWCNTs) modified asphalts |
| title_short | Evaluation of different functionalized multi-walled carbon nanotubes (MWCNTs) modified asphalts |
| title_sort | evaluation of different functionalized multi walled carbon nanotubes mwcnts modified asphalts |
| topic | modified asphalt multi-walled carbon nanotubes high and low temperature characteristics fatigue properties anti-aging performance |
| url | https://journals.pan.pl/Content/133461/PDF/19_int_cor.pdf |
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