S95级和S105级矿渣粉在实际生产中的选用研究

Selection of S95 and S105 Slag Powder in Practical Production

为解决实际生产过程中S95级和S105级矿渣粉的选用问题,利用水泥与球磨得到的S95级和S105级矿渣粉制得水泥胶砂,并探讨了S95级和S105级矿渣粉的掺入对水泥胶砂活性指数、凝结时间、标准稠度用水量和流动度的影响。实验结果表明:掺S95级和S105级矿渣粉后水泥胶砂试体的活性指数与流动度比均达标,初凝时间有较大延长,用水量也相应增大,但S95级矿渣组的用水量比S105级矿渣组略低,流动度比比S105级矿渣组大。初凝时间比S105级矿渣组长。因此现实生产中可以适当掺入S95级矿渣粉来配制需要相对长凝结时间的混凝土;且为了节约能耗,提高生产效率,在强度达标的情况下选择使用S95级矿渣粉。

To select the slag powder of S95 grade and S105 grade for use in practical production,the cementmortar was prepared by using cement,ball milled S95 and S105 slag powder. And the effects of S95 and S105 slag powder＇s addition on the activity index,setting time,water consumption and fluidity of cement mortar wereanalyzed. The experimental results showed that the activity index and fluidity ratio of cement mortar with the S95 and S105 slag powder met the standard,the initial setting time was greatly prolonged,and the water consumptionalso increased correspondingly. But the group S95 slag powder＇s water consumption was lower,fluidity ratio washigher and initial setting time was longer than those of the group S105 slag powder. Therefore,the S95 slagpowder can be properly added to prepare concrete requiring a relatively long setting time in actual production.And to save energy and improve production efficiency,the S95 slag powder can be selected for use if the strengthof cement mortar reaches standards.