钢渣单掺与复掺对氯氧镁水泥性能的影响

兰州理工大学学报 ›› 2025, Vol. 51 ›› Issue (3): 24-31.

钢渣单掺与复掺对氯氧镁水泥性能的影响

乔宏霞^*1,2, 王金盆¹, 尚明刚^1,2, 韩月辉¹

1.兰州理工大学土木工程学院, 甘肃兰州 730050;
2.兰州理工大学西部先进土木工程材料研究中心, 甘肃兰州 730050

收稿日期:2024-04-12 出版日期:2025-06-28 发布日期:2025-06-30
通讯作者: 乔宏霞 (1977-),女,山西应县人,教授,博导.Email:qiaohongxia@lut.edu.cn
基金资助:
国家自然科学基金(52178216)

Effect of steel slag single addition and dual addition on the properties of magnesium oxychloride cement

QIAO Hong-xia^1,2, WANG Jin-pen¹, SHANG Ming-gang^1,2, HAN Yue-hui¹

1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
2. Gansu Advanced Civil Engineering Materials Engineering Research Center, Lanzhou University of Technology, Lanzhou 730050, China

Received:2024-04-12 Online:2025-06-28 Published:2025-06-30

摘要/Abstract

摘要： 为拓展钢渣在不同水泥基材料中的应用,研究了钢渣单掺以及钢渣和粉煤灰复掺对氯氧镁水泥(MOC)流动度、水化热、抗压强度和耐水性能的影响.采用X射线衍射(XRD)、低场核磁共振(LF-NMR)和扫描电子显微镜(SEM)等微观方法表征掺杂后水泥的水化产物和微观形貌.结果表明:钢渣作为辅助胶凝材料加入MOC中可以提高MOC的工作性能.当钢渣掺量为10%时,对MOC各龄期抗压强度影响不明显,提高了MOC的耐水性能.当掺量大于10%时,MOC的抗压强度和耐水性能显著下降.钢渣和粉煤灰在MOC中存在水化叠加效应,当复掺比例为1∶1时,试样水化放热总量最高,耐水性能最优,软化系数提高了0.38.

关键词: 钢渣, 氯氧镁水泥, 粉煤灰, 耐水性能, 孔结构

Abstract: In order to expand the application of steel slag in different cementitious materials, the effects of single addition of steel slag and dual addition of steel slag and fly ash on the flowability, heat of hydration, compressive strength, and water resistance of magnesium oxychloride (MOC) cements were investigated. Microscopic methods such as X-ray diffraction (XRD), low-field nuclear magnetic resonance (LF-NMR) and scanning electron microscopy (SEM) were used to characterize the hydration products and microscopic morphology.The results showed that theaddition of steel slag as supplementary cementitious materials to MOC can improve the working performance of MOC. When the dosage of steel slag is 10%, the effect on the compressive strength of MOC at all ages is not obvious, and the water resistance of MOC is improved. The compressive strength and water resistance of MOC decrease significantly when the dosage is greater than 10%. There is a hydration superposition effect of steel slag and fly ash in MOC, and when the dual addition ratio is 1∶1, the specimen has the highest total hydration exotherm, the best water resistance, and the softening coefficient is increased by 0.38.

Key words: steel slag, magnesium oxychloride cement, fly ash, water resistance, pore characteristics

中图分类号:

TB321

乔宏霞, 王金盆, 尚明刚, 韩月辉. 钢渣单掺与复掺对氯氧镁水泥性能的影响[J]. 兰州理工大学学报, 2025, 51(3): 24-31.

QIAO Hong-xia, WANG Jin-pen, SHANG Ming-gang, HAN Yue-hui. Effect of steel slag single addition and dual addition on the properties of magnesium oxychloride cement[J]. Journal of Lanzhou University of Technology, 2025, 51(3): 24-31.

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