| 引用本文: | 周彰安,王志佳,段书苏,李南宁,冯志升.硫酸钠激发钢渣-矿渣复合胶凝材料工程性能及基体增强机理[J].材料科学与工艺,2026,(2):39-47.DOI:10.11951/j.issn.1005-0299.20240201. |
| ZHOU Zhangan,WANG Zhijia,DUAN Shusu,LI Nanning,FENG Zhisheng.Engineering performance and matrix reinforcement mechanism of sodium sulfate activated steel slag-slag composite cementitious material[J].Materials Science and Technology,2026,(2):39-47.DOI:10.11951/j.issn.1005-0299.20240201. |
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| 摘要: |
| 为探究硫酸钠激发钢渣-矿渣复合胶凝材料的工程性能和强度增强机理,提升钢渣、矿渣的应用价值和生态环保价值,进行钢渣-矿渣复合胶凝材料的钢矿比、硫酸钠掺量和水固比对无侧限抗压强度、凝结时间和流动性影响的单因素实验,采用XRD、SEM等测试手段探究复合胶凝材料基体增强机理。结果表明:钢渣和矿渣比例为3∶7时协同效果最佳,硫酸钠最优掺量为9%,水固比与强度为负相关,硫酸钠改善浆体流动性并缩短凝结时间,验证了硫酸钠激发剂的工程适用性；硫酸钠的掺加促进C-S-H凝胶的产生,并且激发钢渣-矿渣生成C-A-S-H凝胶。硫酸钠通过激发钢渣-矿渣复合胶凝材料生成钙矾石和金属阳离子,提高浆体pH值,加速水化,促进硅氧化物和铝氧化物溶解,形成C-S-H和C-A-S-H凝胶,显著增强材料抗压性能。 |
| 关键词: 硫酸钠 钢渣-矿渣 钢矿比 水固比 工程性能 基体增强机理 |
| DOI：10.11951/j.issn.1005-0299.20240201 |
| 分类号:TU53 |
| 文献标识码:A |
| 基金项目:海南省“南海新星”项目资助(202309008). |
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| Engineering performance and matrix reinforcement mechanism of sodium sulfate activated steel slag-slag composite cementitious material |
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ZHOU Zhangan1, WANG Zhijia1, DUAN Shusu1, LI Nanning1, FENG Zhisheng2
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(1.School of Civil Engineering, Hainan University, Haikou 570228,China; 2.Hainan Jingwei Micro Carbon Environmental Protection Technology Co., Ltd., Sanya 572024,China)
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| Abstract: |
| The effects of steel-to-slag ratio, sodium sulfate content, and water-to-solid ratio on the unconfined compressive strength, setting time, and fluidity of steel slag-slag composite cementitious materials were investigated through single-factor experiments.The study aimed to investigate the engineering performance and strength enhancement mechanism of sodium sulfate activated steel slag-slag composite cementitious materials, thus improving the application and ecological benefits. Additionally, X-ray diffraction (XRD) and other microscopic tests were used to investigate the matrix enhancement mechanism of composite cementitious materials.The results indicate that a steel slag-to-slag ratio of 3∶7 achieves the best synergistic effect, while the optimal dosage of sodium sulfate is 9%. The water-solid ratio is negatively correlated with the strength, whereas sodium sulfate improves slurry fluidity and shortens the setting time, confirming its engineering applicability as an activator.Moreover, sodium sulfate promotes the production of C-S-H gel and facilitates the generation of C-A-S-H gel within the steel slag-slag matrix. Sodium sulfate activation also enhances the formation of ettringite and metal cations in the composite cementitious material, increases the slurry pH, accelerates hydration, and promotes the dissolution of silicon and alumina oxides.This process leads to the formation of C-S-H and C-A-S-H gels,and significantly improving the compressive properties of the material. |
| Key words: sodium sulphate steel slag-slag steel slag-slag ratio water-solid ratio engineering properties matrix enhancement mechanism |
