Proceedings of the 2025 7th International Conference on Civil Engineering, Environment Resources and Energy Materials (CCESEM 2025)

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Durability of Cement-Modified Phosphogypsum Composites Under Water Immersion

Authors
Zeyi Zhang1, 2, Yongwei Zhang1, 2, Shufan Cheng1, *
1Hubei Road and Bridge Group Co., Ltd., Wuhan, 430056, China
2Hubei Road & Bridge Group HST Engineering Construction Co., Ltd., Wuhan, China, 430056
*Corresponding author. Email: chengshufan@whu.edu.cn
Corresponding Author
Shufan Cheng
Available Online 16 December 2025.
DOI
10.2991/978-94-6463-902-5_33How to use a DOI?
Keywords
phosphogypsum (PG); cement modification; building materials; water erosion
Abstract

Preparation of lightweight blocks from phosphogypsum (PG) is one of the effective approaches for its utilization under current technical conditions. To clarify the applicability of cement-solidified PG composites (PGC) in outdoor environments, mechanical property tests were conducted on PGC under water immersion, with an analysis of their damage patterns. The research results indicate that the PGC solidified body has water resistance, with a softening coefficient of 0.85. However, surface disintegration still occurs after long-term immersion: the mass loss rates reach 3% and 8% after 14 and 28 days of immersion, respectively. While the water resistance of PGC improves with increasing cement content, such improvement is not significant within the test range (25% to 35%), and the maximum water-resistant duration is only 21 days. Therefore, PGC materials should be used in water-free environments. When applied in soaking environments, it is necessary to perform appropriate hydrophobic treatment on the surfaces to ensure their performance.

Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 2025 7th International Conference on Civil Engineering, Environment Resources and Energy Materials (CCESEM 2025)
Series
Advances in Engineering Research
Publication Date
16 December 2025
ISBN
978-94-6463-902-5
ISSN
2352-5401
DOI
10.2991/978-94-6463-902-5_33How to use a DOI?
Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Zeyi Zhang
AU  - Yongwei Zhang
AU  - Shufan Cheng
PY  - 2025
DA  - 2025/12/16
TI  - Durability of Cement-Modified Phosphogypsum Composites Under Water Immersion
BT  - Proceedings of the 2025 7th International Conference on Civil Engineering, Environment Resources and Energy Materials (CCESEM 2025)
PB  - Atlantis Press
SP  - 340
EP  - 346
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-902-5_33
DO  - 10.2991/978-94-6463-902-5_33
ID  - Zhang2025
ER  -