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硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (7): 2237-2249.DOI: 10.16552/j.cnki.issn1001-1625.2025.1317

• 水泥混凝土 • 上一篇    下一篇

赤泥基复合水化晶种对硅酸盐水泥砂浆性能的影响

李富云1(), 黄胜晶1, 焦威力1, 邓孝炜1, 陈春恒1, 韦驰1, 赖芳1, 李晶1,2,3()   

  1. 1.广西大学化学化工学院,南宁 530004
    2.广西零碳智能化重点实验室,南宁 530004
    3.广西高校低碳绿色化工新技术重点实验室,南宁 530004
  • 收稿日期:2025-12-31 修订日期:2026-03-09 出版日期:2026-07-15 发布日期:2026-08-13
  • 通信作者: 李 晶,博士,教授。E-mail:lijingsophia1234@163.com
  • 作者简介:李富云(2004—),男。主要从事铝工业废弃物赤泥在水泥砂浆中的资源化利用的研究。E-mail:2695720503@qq.com
  • 基金资助:
    “大学生创新创业训练计划”项目(S202410593112);广西自然科学基金会(2025GXNSFDA069049)

Effects of Red Mud-Based Composite Hydration Seeds on Properties of Portland Cement Mortar

LI Fuyun1(), HUANG Shengjing1, JIAO Weili1, DENG Xiaowei1, CHEN Chunheng1, WEI Chi1, LAI Fang1, LI Jing1,2,3()   

  1. 1.College of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China
    2.Guangxi Key Laboratory of AI-Driven Zero-Carbon Technology,Nanning 530004,China
    3.Key Laboratory of New Low-Carbon Green Chemical Technology,Education Department of Guangxi Zhuang;Autonomous Region,Nanning 530004,China
  • Received:2025-12-31 Revised:2026-03-09 Published:2026-07-15 Online:2026-08-13

摘要:

为提升赤泥在水泥基材料中的高效资源化利用,本研究采用酸浸预处理结合水热合成的方法制备了赤泥基复合水化晶种(RM-CAW),并将其掺入水泥砂浆中,系统研究其对水泥水化反应、微观结构及力学性能的影响。通过力学性能测试及X射线衍射(XRD)、热重分析(TG)、扫描电子显微镜(SEM)、比表面积及孔径分析等表征手段,对RM-CAW的增强机制进行了探讨。结果表明,掺入RM-CAW的水泥砂浆在7和28 d均表现出更优的力学性能,其中掺入5.0%(质量分数)RM-CAW的砂浆(HARM-5.0)28 d抗折强度和抗压强度较基准水泥砂浆分别提高11.1%和6.9%。RM-CAW的引入促进了水化硅酸钙(C-S-H)等水化产物的生成,显著改善了界面过渡区结构并提高了体系致密性,促进了孔隙细化与大孔比例降低。

关键词: 赤泥, 赤泥基复合水化晶种, 普通硅酸盐水泥, 腐殖酸, 水热合成, 资源化利用

Abstract:

To enhance the efficient resource utilization of red mud in cement-based materials, this study prepared red mud-based composite hydration seeds (RM-CAW) via acid leaching pretreatment combined with hydrothermal synthesis, and incorporated them into cement mortar to systematically investigate their effects on cement hydration behavior, microstructure, and mechanical properties. Mechanical performance tests together with X-ray diffraction(XRD), thermogravimetric analysis(TG), scanning electron microscopy(SEM), and specific surface area and pore size distribution analyses were conducted to elucidate the strengthening mechanism of RM-CAW. The results indicate that the incorporation of RM-CAW significantly improves the mechanical properties of cement mortar at both 7 and 28 d. In particular, compared with reference cement mortar, the mortar with 5.0%(mass fraction) RM-CAW (HARM-5.0) specimen exhibits increases of 11.1% and 6.9% in flexural strength and compressive strength at 28 d, respectively. The addition of RM-CAW promotes the formation of hydration products such as calcium silicate hydrate(C-S-H), has a pronounced improvement in the interfacial transition zone and an overall densification of the matrix, and promotes pore structure refinement and a reduction in the proportion of large pores.

Key words: red mud, red mud-based composite hydration seed, ordinary Portland cement, humic acid, hydrothermal synthesis, resource utilization

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