机械辅助湿化学法合成纳米C-S-H复合晶种早强剂的研究

doi:10.16552/j.cnki.issn1001-1625.2025.0480

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (10): 3654-3664.DOI: 10.16552/j.cnki.issn1001-1625.2025.0480

机械辅助湿化学法合成纳米C-S-H复合晶种早强剂的研究

杨立荣^1,2,3, 杨士汶¹, 李帅康¹, 王生强¹, 张华康¹, 刘志刚^1,2,3, 王春梅^1,2,3

1.河北省无机非金属材料重点实验室,唐山 063210;
2.河北省工业固废综合利用技术创新中心,唐山 063210;
3.华北理工大学材料科学与工程学院,唐山 063210

收稿日期:2025-05-08 修订日期:2025-07-09 出版日期:2025-10-15 发布日期:2025-11-03
通信作者: 王春梅,博士,副教授。E-mail:wcm15507@126.com
作者简介:杨立荣(1974—),女,博士,副教授。主要从事水泥基材料及固废资源化利用方面的研究。E-mai:ylr2005@126.com
基金资助:
燕赵钢铁实验室区域创新能力提升项目(YZISL2024008)

Synthesis of Nano C-S-H Composite Seed Early-Strength Agent by Mechanically Assisted Wet-Chemical Method

YANG Lirong^1,2,3, YANG Shiwen¹, LI Shuaikang¹, WANG Shengqiang¹, ZHANG Huakang¹, LIU Zhigang^1,2,3, WANG Chunmei^1,2,3

1. Hebei Provincial, Key Laboratory of Inorganic Non-metallic Materials, Tangshan 063210, China;
2. Hebei Technology Innovation Center for Comprehensive Utilization of Industrial Solid Waste, Tangshan 063210, China;
3. School of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, China

Received:2025-05-08 Revised:2025-07-09 Published:2025-10-15 Online:2025-11-03

摘要/Abstract

摘要： 硫酸钠(Na₂SO₄)和纳米水化硅酸钙(C-S-H)晶种可作为水泥基材料的早强剂,二者结合使用可进一步提高水泥基材料的早期力学性能。本研究分别以分析纯CaSO₄和Na₂SiO₃·9H₂O为钙源和硅源,聚羧酸减水剂(PCE)为分散剂,采用机械辅助湿化学法原位制备Na₂SO₄和纳米C-S-H复合晶种早强剂,考察了钙硅摩尔比和机械力作用时间对复合晶种早强剂结构和性能的影响,探讨了复合晶种早强剂的合成机制。结果表明,钙硅摩尔比1.0、机械力作用时间1.0 h时,制备的复合晶种早强剂表现出较低的平均粒度(52.38 nm)、较高的稳定性和优异的早强性能。当机械力作用时间为1.0 h时,Na₂SO₄和纳米C-S-H协同作用使大掺量矿渣水泥1 d抗压强度提升35.3%。与单掺纯纳米C-S-H晶种及Na₂SO₄的相比,复合晶种早强剂的加入使大掺量矿渣水泥1 d抗压强度分别提高了13.1%和17.3%。机械力作用可细化CaSO₄颗粒,破坏化学键,提高Ca²⁺溶出活性,促进钙、硅组分均匀混合,协同湿化学反应原位高效制备纳米复合晶种早强剂。本研究为实现水泥基材料低成本、大规模使用复合晶种早强剂提供支撑。

关键词: 复合晶种早强剂, 硫酸钠, 纳米水化硅酸钙, 机械辅助湿化学法

Abstract: Sodium sulfate (Na₂SO₄) and nano calcium silicate hydrate (C-S-H) seeds can be used as early-strength agents for cement-based materials. The combination of the two can further improve the early mechanical properties of cement-based materials. In this study, analytically pure CaSO₄ and Na₂SiO₃·9H₂O were used as calcium source and silicon source, respectively, and polycarboxylate superplasticizer (PCE) was used as dispersant to prepare Na₂SO₄ and nano C-S-H composite seed early-strength agent in situ by mechanical assisted wet-chemical method. The effects of calcium-silicon molar ratio and mechanical force application time on the structure and properties of composite seed early-strength agent were investigated, and the synthesis mechanism of composite seed early-strength agent was discussed. The results show that the composite seed early-strength agent prepared by calcium-silicon molar ratio of 1.0 and mechanical force application time of 1.0 h shows lower average particle size (52.38 nm), higher stability and excellent early-strength performance. When the mechanical force application time is 1.0 h, the synergistic effect of Na₂SO₄ and nano C-S-H increases the 1 d compressive strength of high-content slag cement by 35.3%. Compared with pure nano C-S-H seed and Na₂SO₄, the addition of composite seed early-strength agent increases the 1 d compressive strength of high-content slag cement by 13.1% and 17.3%, respectively. Mechanical force can refine CaSO₄ particles, break chemical bonds, improve Ca²⁺ leaching activity, promote uniform mixing of calcium and silicon components, and collaborate with wet-chemical reactions to efficiently prepare nano composite seed early-strength agents in situ. This study can provide support for the low-cost and large-scale utilization of composite seed early-strength agents in cement-based materials.

Key words: composite seed early-strength agent, Na₂SO₄, nano C-S-H, mechanically assisted wet-chemical method

中图分类号:

TU528

杨立荣, 杨士汶, 李帅康, 王生强, 张华康, 刘志刚, 王春梅. 机械辅助湿化学法合成纳米C-S-H复合晶种早强剂的研究[J]. 硅酸盐通报, 2025, 44(10): 3654-3664.

YANG Lirong, YANG Shiwen, LI Shuaikang, WANG Shengqiang, ZHANG Huakang, LIU Zhigang, WANG Chunmei. Synthesis of Nano C-S-H Composite Seed Early-Strength Agent by Mechanically Assisted Wet-Chemical Method[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(10): 3654-3664.

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机械辅助湿化学法合成纳米C-S-H复合晶种早强剂的研究

Synthesis of Nano C-S-H Composite Seed Early-Strength Agent by Mechanically Assisted Wet-Chemical Method

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