研究了硅酸盐水泥添加钢渣膨胀剂后的物理化学性能和膨胀性能。调节钢渣的细度和掺量，可改变硬化浆体的膨胀大小。并探讨了钢渣水泥膨胀剂的膨胀机理，提出了膨胀是由于钢渣中游离氧化钙水化产物局部堆积，使空隙体积增加。产生表观体积膨胀的观点。

Study on Expansive Property of Steel Slag Expansive Cement Mi Chunyan Lin ZongshouChemical and physical properties and expansive property have been studied for steel slag expansive cement. The in- fluence of steel slag proportions and fineness on expansion are presented. This paper discuss the expanding mechanism and typical properties of steel slag expansive cement. The hydration of free-lime in steel slag leads to the hydrates local accumulation,the vol- ume increase of void and the apparent volume expansion.steel slag; expanding mechanism; free-lime