Green and Sustainable Superhydrophobic Phosphogypsum Mortar Coating with Self-Cleaning Properties and Water Resistance
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 9
Abstract
Phosphogypsum (PG) is a solid waste generated by phosphate fertilizer industries that is currently used in concrete materials. However, adding PG to concrete usually results in reducing its water resistance and corrosion resistance. This paper presents a new method of applying PG to concrete to improve its water resistance. In this paper, a green superhydrophobic PG (SPG) coating was prepared using modified PG as a hydrophobic medium and cement as the bonding material. The contact angle between the superhydrophobic phosphogypsum coating (SPG coating) and water was 156°, and the coating reached a superhydrophobic state with good self-cleaning ability. Even when sandpaper was used to polish the coating, the water contact angle of the coating was still greater than 150°, indicating that the coating had good wear resistance. In addition, the results of water absorption and electrochemical experiments indicated that mortar coated with SPG had better water resistance and corrosion resistance than ordinary mortar. The SPG coatings with water resistance, wear resistance, and self-cleaning properties have potential applications in building exterior walls.
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Data Availability Statement
Some or all data or models that support the findings of this study are available from the corresponding author upon request.
Acknowledgments
This work was supported by Taishan Scholar Project of Shandong Province (No. TSHW20130956) and the Natural Science Foundation of Shandong Province, China (No. ZR2023QE053).
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Published In
Journal of Materials in Civil Engineering
Volume 36 • Issue 9 • September 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Nov 8, 2023
Accepted: Feb 21, 2024
Published online: Jun 18, 2024
Published in print: Sep 1, 2024
Discussion open until: Nov 18, 2024
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