摘   要：钢渣微粉具有较高的表观密度和对减水剂较差的吸附能力，取代部分矿粉后，混凝土的坍落度增加，工作性能提升。在商品混凝土中，钢渣微粉以适度的掺量（25%～50%）取代矿粉后，混凝土的力学性能有所提高，且各龄期收缩都有微弱的改善，混凝土的裂纹条数和开裂面积都有一定程度的降低，混凝土的冻融循环次数、电通量都较基准样有所改善，碳化深度明显降低，抗渗等级稳定，在高强度等级混凝土中，这种改善作用更为明显。

Abstract: Steel slag fine powder is characterized with high apparent density and poor absorption capacity to water-reducer. That steel slag replaces part of mineral powder, increases the slump of concrete, and improves the working performance of concrete. For ready-mixed concrete, with proper dosage (25%～50%) of steel slag fine powder replacing the mineral powder, the working performance of concrete is enhanced, the shrinkage in every age is improved slightly, number and area of crack in concrete have a certain degree of reduction, number of freezing and thawing cycle and electric flux are better than those of the reference sample, carbonation depth decreases significantly, and the seepage resistance stays stable. For the high-strength concrete, with this method, the improvement would be more effective.