攀钢钢渣细粉对水泥胶凝性能的影响

Effects of Steel Slag Fine Powder from Panzhihua Steel on Cementitious Properties of Cement

为探究攀钢转炉钢渣作为水泥掺加料、实现钢渣高效资源化利用的可行性,以攀钢转炉钢渣和四川峨胜水泥熟料为原料,研究了不同粒度、不同掺量钢渣细粉对水泥胶凝性能的影响。结果表明:在钢渣细粉掺加量一定的情况下,掺入的钢渣细粉粒度越细,水泥的标准稠度需水量越大、初凝和终凝时间越长、水泥胶砂的强度和活性指数越高;在钢渣细粉粒度一定的情况下,水泥胶砂的强度随着钢渣细粉掺入量的增加而降低,当钢渣细粉掺入量超过钢渣复合水泥质量分数的30%时,水泥胶砂的强度将大幅下降;D50=6.21μm和D50=3.17μm的钢渣细粉按30%取代水泥时,钢渣复合水泥胶砂的强度和安定性均满足国家P.S.A 32.5级水泥标准要求。

In order to explore the feasibility of steel slag addition in cement to realize high efficient utilization of steel slag, the effects of different particle size and different mixing amount of steel slag were studied on the cementitious properties of cement by using steel slag from Panzhihua Steel and cement clinker from Esheng Cement Group as raw materials. The results showed that, with the same mixing amount of steel slag, both the water requirement of normal consistency and the initial and the final setting time of cement were increased with the decrease of the particle size of steel slag. In addition, the activity index and the strength of cement mortar were also increased. With the same particle size of steel slag fine powder, the strength of cement mortar was decreased with the increase of steel slag fine powder. When the mixing amount of steel slag fine powder was above 30% by weight,the strength of cement mortar was decreased significantly. When 30% of cement by weight was replaced by steel slag fine powder of Dso = 3.17 μm or Ds0 = 6.21 μm, the strength and soundness of the cement mortar with steel slag could reach the standard of P. S. A 32.5 cement.