钢渣矿渣水泥性能的研究

Factors Influencing the Properties of Steel Slag Cement

以钢渣、矿渣、水泥熟料为主要原料,并掺入少量激发剂,成功制备了高强、高钢渣掺量的钢渣水泥。探讨了激发剂、熟料掺量、钢渣掺量对钢渣水泥性能的影响。并通过SEM、XRD分析了激发剂对钢渣水泥水化产物及水泥石微观结构的影响。结果表明:激发剂显著提高了钢(矿)渣的活性,从而大幅度提高了钢渣水泥的早期性能。掺加激发剂后,钢渣水泥3d抗压强度可增加119.7%,激发剂对水泥水化产物的种类影响不大。与硅酸盐水泥相比,钢渣水泥浆体中C-S-H凝胶和AFt晶体含量明显增多,Ca(OH)2晶体含量显著降低。

By adding small amount of composite activator to steel slag-blast furnace slag-clinker system, high content of steel slag and high strength steel slag cement was successfully prepared. The effect of activators, the ratio of clinker and steel slag on the properties of steel slag cement were studied. Hydration products of steel slag cement and micro-structure of harden paste were investigated by SEM and XRD. The results show that the activity of steel slag was enhanced significantly and the early properties of steel slag cement was remarkably improved. The 3d compressive strength was increased by 119.7% by the addition of activator, The species of hydration products of composite cement were influenced slightly, but the content of C-S-H gel and Aft crystals is apparently higher than that of Portland cement and the content of Ca（OH）2 crystals is lower than that.