大掺量钢渣微粉-水泥碱激发特性  

Alkali activation characteristics of cement with large amount steel slag powder

作　　者：张彩利 王犇 李天豪 王亦飞 李宁利 ZHANG Caili;WANG Ben;LI Tianhao;WANG Yifei;LI Ningli(School of Civil and Transportation;Tianjin Traffic Engineering Green Material Technology Engineering Center,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]河北工业大学土木与交通学院 [2]天津市交通工程绿色材料技术工程中心,天津300401

出　　处：《中国粉体技术》2023年第2期55-65,共11页China Powder Science and Technology

基　　金：长安大学重点科研平台开放基金项目,编号:300102210510。

摘　　要：为解决钢渣微粉在水泥基复合材料中掺配比例较低的问题,采用力学性能测试、 XRD、 SEM、 FTIR等方法研究激发剂种类、掺量等对钢渣微粉-水泥胶凝材料力学强度和微观结构的影响。结果表明:碱性激发剂可提高钢渣微粉水化速度、增大复合胶凝材料抗压强度,但激发剂种类对胶凝材料激发效果具有差异性;碳酸钠与三乙醇胺复合激发后效果显著,3、 7、 28 d龄期的最佳强度与未掺加激发剂实验组的相比分别提高47%、 72%、 69%;激发剂对复合胶凝材料浆体水化产物种类没有影响;三乙醇胺具有悬浮稳定效应以及降低溶液表面张力的能力,与碳酸钠的强腐蚀效应作用在钢渣微粉水泥体系中协同强化水化反应,使复合胶凝体系中生成更多的水化产物并且相互交织成复杂密实的空间结构。In order to solve the problem of low-proportion steel slag powder in cement-based composite materials, the impact of activate type, dosage on mechanical properties and microstructure of steel slag powder-cement cementitious materials were studied by mechanical properties test, XRD, SEM, FTIR, etc. The results show that alkali-activator can improve the hydration speed of steel slag powder and increase the compressive strength of the composite cementitious material, but different activators exerts different excitation effects on the cementitious material. The compound activation effect of sodium carbonate and triethanolamine is remarkable. The optimal strength on 3, 7 and 28 d is increased by 47%, 72% and 69%, respectively, comparing with the experimental group without activator. The hydration product type of composite cementitious slurry is not affected by the activator. Triethanolamine has suspension stabilization effect and ability to reduce the surface tension of the solution. Combined with the strong corrosion effect of sodium carbonate, it synergistically strengthens the hydration reaction in the steel slag powder cement system, so that more hydration products are generated in the composite cementitious system and intertwined into a complex and dense spatial structure.

关 键 词：钢渣微粉 复合激发剂 抗压强度 水化机理 微观特性 

分 类 号：TU582[建筑科学—建筑技术科学]