少熟料钢渣水泥水化硬化机理的研究

Research on the Hydrating Mechanism of Clinker-poor Steel Slag Cement

利用X射线衍射、差热分析、扫描电镜和孔结构分析等测试手段,对少熟料钢渣水泥在新型碱性复合激发剂作用下的水化特性进行了研究,并对其水化硬化机理进行了探讨。结果表明,在碱性复合激发剂M的作用下,当钢渣和矿渣掺量各为40%、熟料掺量为15%、石膏掺量为5%时,钢渣水泥的性能达到了国家标准42.5等级普通硅酸盐水泥的技术要求;少熟料钢渣水泥的水化过程,首先是外加剂和熟料的水化,然后在它们的共同作用下钢渣解离并水化。激发剂组分和一次水化产物,是决定少熟料钢渣水泥正常凝结和硬化的主要因素。

The hydration products of clinker-poor steel slag cement were analyzed and identified by means of XRD, DTA, SEM, and Mercury Proximate. Meanwhile, the mechanism of hydration and hardening of the cement was discussed in detail. The results show the properties of the clinker-poor steel slag cement, with a composition of steel slag 40 %, blast furnace slag 40 %, clinker 15 %, gypsum 5 % and composite alkali activators 2.5 %, can measure up the stands of grade 42.5 ordinary Portland cement. The hydration process of the cement includes activators hydration, clinkers, hydration, steel slag dissociation and hydration. The normal setting and hardening of the cement depend on the components of the composite activators and the first hydration products of clinker.