Research on the durability and mechanism of super absorbent polymer [SAP] on seawater sea sand cement matrix [SSCM]
1
College of Intelligent Construction, Wuchang University of Technology, PR China
These authors had equal contribution to this work
Submission date: 2024-07-18
Final revision date: 2025-02-13
Acceptance date: 2026-04-26
Publication date: 2026-05-10
Corresponding author
Cement Wapno Beton 30(4) 310-324 (2025)
KEYWORDS
TOPICS
ABSTRACT
Seawater sea-sand cement matrix [SSCM] is an abundant, cost-effective material with favorable mechanical properties, making it a promising eco-friendly building material. In this study, modified SSCM is prepared by incorporating superabsorbent polymers [SAP]. The durability characteristics, including drying shrinkage, impermeability, and freeze-thaw resistance, are systematically investigated. Additionally, the underlying mechanisms and micro-structural characteristics of SSCM are examined through hydration degree analysis and scanning electron microscopy [SEM]. The experimental results indicate that the incorporation of SAP can significantly improve the anti-drying shrinkage behavior and anti-freeze-thaw of SSCM. When the SAP content reaches 1.0 %, the drying shrinkage is reduced by 18.0 %. Meanwhile, when the SAP content is 0.5 %, the modified SSCM exhibits the strongest impermeability, reaching 4.95 MPa an increase of 86.8 % compared to the control SSCM. In addition, the hydration degree and SEM analysis indicates that the incorporation of SAP enhances cement hydration of SSCM, with a 1.0 % SAP dosage increasing the 14-day hydration degree by 7.3 % compared to the control SSCM. Additionally, higher SAP content promotes the formation of C-S-H and AFt hydration products.
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