Technical Papers
Jul 7, 2021

Effect of TiO2/CeO2 on Photocatalytic Degradation Capability and Pavement Performance of Asphalt Mixture with Steel Slag

Publication: Journal of Materials in Civil Engineering
Volume 33, Issue 9

Abstract

Photocatalytic pavements materials are being developed to purify toxic automobile exhaust gas, especially in tunnels where the pollution concentrations are high. This study investigated the photocatalytic efficiency and pavement performance of asphalt mixtures containing steel slag and different contents of CeO2 and TiO2 as photocatalyst materials. Photocatalytic testing equipment was developed to calculate the photodegradation efficiency for CO, CO2, NO, and HC. The pavement performance of the asphalt mixtures was evaluated using rutting tests and low-temperature bend tests. The texture depth was measured to evaluate the antislide performance. The excessive addition of the CeO2 and TiO2 nano photocatalysts had an adverse effect on the pavement performance of the steel slag asphalt mixture. The optimal contents of CeO2 and TiO2 were 7% and 0.6% by weight of the asphalt binder weight, respectively, as obtained by a gray target decision process based on principle component analysis. These findings are expected to contribute to the development of functional pavement materials that improve the surrounding air quality and have a lower environmental impact due to the use of waste slag.

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Data Availability Statement

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

Acknowledgments

The authors would like to acknowledge the financial support from the Natural Science Foundation for Youth of Shaanxi Provincial (S2017-ZRJJ-QN-0944) and the Science and Technology Project of the Shaanxi Transportation and Transportation Department (10-26K).

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Go to Journal of Materials in Civil Engineering
Journal of Materials in Civil Engineering
Volume 33Issue 9September 2021

History

Received: Jun 15, 2020
Accepted: Feb 19, 2021
Published online: Jul 7, 2021
Published in print: Sep 1, 2021
Discussion open until: Dec 7, 2021

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Authors

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Hansong Wu, Ph.D., D.Sc. [email protected]
School of Highway, Chang’an Univ., Xi’an 710064, Shaanxi, China (corresponding author). Email: [email protected]
Professor, School of Highway, Chang’an Univ., Xi’an 710064, Shaanxi, China. Email: [email protected]
Xiaolong Yang, Ph.D., D.Sc. [email protected]
School of Highway, Chang’an Univ., Xi’an 710064, Shaanxi, China. Email: [email protected]
Ziming He, Ph.D., D.Sc. [email protected]
School of Highway, Chang’an Univ., Xi’an 710064, Shaanxi, China. Email: [email protected]
Youhua Zhang, Ph.D., D.Sc. [email protected]
School of Highway, Chang’an Univ., Xi’an 710064, Shaanxi, China. Email: [email protected]

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