Evaluation of different functionalized multi-walled carbon nanotubes (MWCNTs) modified asphalts

• Autorzy: He Zhongming , Ou Jianjun , Xie Tangxin , Yang Fangfang , Li Yaqian

Identyfikatory

DOI

10.24425/ace.2024.151894

• Języki publikacji: EN

Abstrakty

EN

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 high-temperature 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.

Słowa kluczowe

EN

modified asphalt; multi-walled carbon nanotube; high temperature; low temperature; fatigue properties; anti-aging performance

PL

asfalt modyfikowany; nanorurki węglowe wielościenne; temperatura wysoka; temperatura niska; własności zmęczeniowe; wydajność przeciwstarzeniowa

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2024
• Tom: Vol. 70, nr 4
• Strony: 307--322
• Opis fizyczny: Bibliogr. 29 poz., il., tab.

Twórcy

autor

He Zhongming

• School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha, Hunan, China

• https://orcid.org/0000-0002-4587-0160

autor

Ou Jianjun

• School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha, Hunan,China

• https://orcid.org/0009-0003-2654-548X

autor

Xie Tangxin

• School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha, Hunan, China

• https://orcid.org/0009-0007-4399-2475

autor

Yang Fangfang

• School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha, Hunan, China

• https://orcid.org/0009-0001-7262-6614

autor

Li Yaqian

• School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha, Hunan, China

• https://orcid.org/0009-0008-9321-6543

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