低热低缩珊瑚海水混凝土的性能调控与硫酸盐侵蚀机理研究

doi:10.16552/j.cnki.issn1001-1625.2025.0681

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (11): 4028-4036.DOI: 10.16552/j.cnki.issn1001-1625.2025.0681

低热低缩珊瑚海水混凝土的性能调控与硫酸盐侵蚀机理研究

达波^1,2, 陈轶骁², 韩宇栋¹, 卿家骏², 余红发³

1.中冶建筑研究总院有限公司,北京 100088;
2.河海大学港口海岸与近海工程学院,南京 210098;
3.南京航空航天大学民航学院,南京 210016

收稿日期:2025-07-14 修订日期:2025-08-17 出版日期:2025-11-15 发布日期:2025-12-04
通信作者: 韩宇栋,博士,正高级工程师。E-mail:hanyudong@cribc.com;余红发,博士,教授。E-mail:yuhongfa@nuaa.edu.cn
作者简介:达波(1988—),男,博士,副教授。主要从事海工混凝土低碳化制备方面的研究。E-mail:dabo@hhu.edu.cn
基金资助:
国家重点研发计划青年科学家项目(2023YFB3711800);国家自然科学基金(52208241)

Performance Regulation and Sulfate Erosion Mechanism of Low-Heat and Low-Shrinkage Coral Aggregate Seawater Concrete

DA Bo^1,2, CHEN Yixiao², HAN Yudong¹, QING Jiajun², YU Hongfa³

1. Central Research Institute of Building and Construction Co., Ltd., MCC Group, Beijing 100088, China;
2. College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China;
3. College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Received:2025-07-14 Revised:2025-08-17 Published:2025-11-15 Online:2025-12-04

摘要/Abstract

摘要： 为解决热带岛礁环境下高强度珊瑚海水混凝土(CASC)的胶凝材料用量大,易产生温差裂缝和干缩裂缝,造成性能劣化加剧的问题,开展了不同强度等级低热CASC、低缩CASC的制备及其力学性能研究,探明了其放热、收缩和抗渗特性,揭示了低热CASC、低缩CASC的破坏形态和力学性能演变规律。结果表明:采用珊瑚微粉替代10%(质量分数)水泥可使CASC放热量降低5.4%,在CASC中掺入“膨胀剂+高分子吸水树脂”可使其收缩率降低10%;C30低缩CASC的抗渗等级为P14,C55低热CASC和低缩CASC的抗渗等级分别为P16和P17;硫酸盐对CASC水化过程具有促进与早强作用;掺入“膨胀剂+高分子吸水树脂”不仅能提高CASC的抗收缩性,而且能降低其脆性,提高力学性能,而掺入珊瑚微粉仅能降低其脆性。

关键词: 低热珊瑚海水混凝土, 低缩珊瑚海水混凝土, 制备方法, 力学性能, 硫酸盐侵蚀

Abstract: To address the issues of high cementitious material consumption, susceptibility to thermal cracks and drying shrinkage cracks, and accelerated performance degradation in high-strength coral aggregate seawater concrete (CASC) under tropical island and reef environments, this study investigated the preparation and mechanical properties of low-heat CASC and low-shrinkage CASC with different strength grades. The heat release, shrinkage, and impermeability characteristics were elucidated, and the failure modes and evolution mechanisms of mechanical properties of low-heat CASC and low-shrinkage CASC were revealed. The results indicate that replacing 10% (mass fraction) of cement with coral powder reduces the heat release of CASC by 5.4%, while incorporating "expansive agent + superabsorbent polymer" reduces shrinkage by 10%. The impermeability grade of C30 low-shrinkage CASC is P14, and the impermeability grades of C55 low-heat CASC and low-shrinkage CASC are P16 and P17, respectively. Sulfate has a promoting and early strengthening effect on the CASC hydration process. The addition of "expansive agent + superabsorbent polymer" not only improves the shrinkage resistance of CASC, but also reduces its brittleness and enhances mechanical properties, whereas coral powder only mitigates brittleness.

Key words: low-heat coral aggregate seawater concrete, low-shrinkage coral aggregate seawater concrete, preparation method, mechanical property, sulfate erosion

中图分类号:

TU528

达波, 陈轶骁, 韩宇栋, 卿家骏, 余红发. 低热低缩珊瑚海水混凝土的性能调控与硫酸盐侵蚀机理研究[J]. 硅酸盐通报, 2025, 44(11): 4028-4036.

DA Bo, CHEN Yixiao, HAN Yudong, QING Jiajun, YU Hongfa. Performance Regulation and Sulfate Erosion Mechanism of Low-Heat and Low-Shrinkage Coral Aggregate Seawater Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(11): 4028-4036.

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低热低缩珊瑚海水混凝土的性能调控与硫酸盐侵蚀机理研究

Performance Regulation and Sulfate Erosion Mechanism of Low-Heat and Low-Shrinkage Coral Aggregate Seawater Concrete

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