钢渣粒度分布对钢渣水泥胶凝性能的影响

为了给钢渣水泥用钢渣粉的颗粒级配优化提供指导，研究了不同研磨时间下钢渣粉的粒度特性以及相应钢渣水泥的胶凝性能，并运用灰色关联分析方法计算了钢渣粉各粒级与钢渣水泥胶砂强度的关联度。结果表明：随着研磨时间的延长，钢渣的比表面积增大，活性增强，从而使钢渣水泥胶砂的抗折强度和抗压强度都得到提高。钢渣粉中小于20 μm的颗粒、特别是10~20 μm粒级对钢渣水泥胶砂的强度起促进作用，而大于20 μm的颗粒对钢渣水泥胶砂的强度起阻碍作用，因此要使钢渣水泥具有更好的胶凝性能，应设法提高-20 μm尤其是10~20 μm粒级的含量，同时减少+20 μm粒级的含量。

Influences of the Particle Size Distribution on the Cementing Properties of Steel Slag Cement

In order to provide guidance for optimizing the particle distribution of steel slag powder in steel slag cement，the particle size characteristics of the steel slag powder and the corresponding cementing performance of the steel slag cement under different grinding time are studied. Then，the gray relational analysis method is used to calculate the correlation of the slag powder with various size and the slag cement mortar strength. The results showed that: with the milling time prolongs，the specific surface area of slag is increased and its activity is enhanced，thus resulting that the slag cement mortar strength and the bending strength have been improved. Slag powder particles smaller than 20 μm，especially 10 ~ 20 μm grain size play a catalytic role in the strength of slag cement mortar. That greater than 20 μm play an inhibiting role in the strength of slag cement mortar. In order to make slag cement owning better gelling properties，how to improve the content of -20 μm particles，especially 10 ~ 20 μm grain，while reduce +20 μm grains should be considered.