Ground iron and steel slag with excellent performance was prepared using the uniform test design. The influence of the fineness and content of steel slag powder on the fluidity and strength of the powder mortar was studied, the regression equations of fluidity and compression strength of different ages are derived, and the contour map is drawn. Based on the optimized composition, the bleeding and dry shrinkage properties and their application in slag concrete are evaluated; the results are compared with ground granulated blast furnace slag powder. The correlation coefficient between fluidity and compression strength of the mortar is more than 0.99, and the predicted value is in good agreement with the measured value, and the average relative error is less than 2%. Regression and isogram analyses show that an increase in the slag fineness and a reduction in its the content contribute to the improvement of the cementiting slag activity. The adequate composition is: steel slag (specific surface area: 520 m²/kg): 20%; blast furnace slag: 80%. Appropriate slag amount can significantly reduce the bleeding and dry shrinkage properties of mortar and optimize the microstructure of the interface transition zone of the concrete aggregate.

使用均匀的测试设计制备了具有优异性能的研磨钢渣。研究了钢渣粉的细度和含量对砂浆流动性和强度的影响，推导了不同龄期流动性和抗压强度的回归方程，并绘制出轮廓图。基于优化的组成，评估了渗水和干缩性能及其在矿渣混凝土中的应用；将结果与磨碎的高炉矿渣粉进行比较。砂浆的流动性与抗压强度之间的相关系数大于0.99，预测值与实测值吻合良好，平均相对误差小于2％。回归分析和等值线分析表明，炉渣细度的增加和含量的减少有助于胶凝炉渣活性的提高。合适的成分是：钢渣（比表面积：520 m² / kg）：20％；高炉矿渣：80％。适当的矿渣量可以显着降低砂浆的渗出和干缩性能，并优化混凝土骨料界面过渡区的微观结构。