Recent Development of Steel Slag Stability and Activating Activity

Steel slag is a kind of industrial waste slag produced during the process of melting steel.Steel slag with higher basicity has potential hydraulic reactivity,because of its higher content of C3S and C2S.Therefore,it can be used in steel slag cement.However,the content of f-CaO in steel slag increases with increase of its basicity resulting in poor volume stability.Consequently,steel slag needs to be pretreated to improve its volume stability and its activity should be activated by mechanical or chemical methods.The inducement and restraint of voluminal expansion when steel slag was used in cementing area as well as the motivation of steel slag activity were discussed in detail.