Abstract

The adverse impact of vehicle emissions on the roadside environment is becoming increasingly serious. Traditional catalytic materials exhibit a singular practical effect and are prone to aggregation within asphalt systems. This study employed organic montmorillonite (MMT) as a two-dimensional nanomaterial load-bearing phase for graphitic carbon nitride (g-C3N4) based on the structural features of available materials and the concept of composite material construction, resulting in the synthesis of a g-C3N4/MMT composite material (CN-M). The phase composition, binding behavior, thermal stability, physical adsorption capacity, and morphology of CN-M were studied systematically. The results demonstrate that CN-M possesses stable properties and structural morphology. The specific surface area of CN-M is 3.38 times that of g-C3N4, indicating superior spatial confinement capabilities. A comprehensive analysis was conducted from both macroscopic and microscopic perspectives on the modification mechanism, rheological characteristics, aging behavior, and catalytic performance of the modified asphalt. It is speculated that CN-M disperses in a layered state within the asphalt binder, effectively restricting the movement of asphalt macromolecular chains. When the CN-M content reached 5%, the modified asphalt exhibited a high-temperature critical temperature of 71.6°C, showcasing optimal high-temperature rheological performance and aging resistance. The prepared modified asphalt mixture demonstrated the ability for waste degradation, achieving a degradation rate of 21.66% for nitric oxide (NO). The research results provide technical support for the development and application of catalytic asphalt materials.

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Data Availability Statement

All data, models, and codes generated or used during the study appear in the published article.

Acknowledgments

This work was supported by the National Natural Science Foundation of China (52174237 and 51704040), the Science Foundation for Outstanding Youth of Hunan Province (2022JJ10051), the Excellent Early Career Scientists from Germany (GZ1717), the Science and Technology Project of Changsha - Outstanding Innovative Youth (kq2305020), the Guangdong Provincial Key Laboratory of Modern Civil Engineering Technology (2021B1212040003), and the Postgraduate Scientific Research Innovation Project of Hunan Province (CX20230851).
Author contributions: Jiao Jin: conceptualization, investigation, writing–original draft, and writing–review and editing. Shuai Liu: methodology and writing–original draft. Ban Zhang: formal analysis and visualization. Guoping Qian: data curation and investigation. Yuchao Gao: conceptualization. Rui Li: investigation and visualization.

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Journal of Materials in Civil Engineering
Volume 36Issue 8August 2024

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Received: Sep 20, 2023
Accepted: Feb 2, 2024
Published online: Jun 4, 2024
Published in print: Aug 1, 2024
Discussion open until: Nov 4, 2024

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Professor, School of Traffic and Transportation Engineering, Changsha Univ. of Science and Technology, Changsha 410114, China; National Engineering Research Center of Highway Maintenance Technology, Hunan, Changsha 410114, China; Guangdong Provincial Key Laboratory of Modern Civil Engineering Technology, Guangzhou 510641, China (corresponding author). ORCID: https://orcid.org/0000-0002-0325-3332. Email: [email protected]
Ph.D. Candidate, School of Traffic and Transportation Engineering, Changsha Univ. of Science and Technology, Changsha 410114, China. Email: [email protected]
Master’s Student, School of Traffic and Transportation Engineering, Changsha Univ. of Science and Technology, Changsha 410114, China. Email: [email protected]
Guoping Qian, Ph.D. [email protected]
Professor, School of Traffic and Transportation Engineering, Changsha Univ. of Science and Technology, Changsha 410114, China; National Engineering Research Center of Highway Maintenance Technology, Hunan, Changsha 410114, China. Email: [email protected]
Ph.D. Candidate, School of Traffic and Transportation Engineering, Changsha Univ. of Science and Technology, Changsha 410114, China. ORCID: https://orcid.org/0000-0003-3985-7733. Email: [email protected]
Master’s Student, School of Traffic and Transportation Engineering, Changsha Univ. of Science and Technology, Changsha 410114, China. Email: [email protected]

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