Experimental Study of Mechanical Properties and Volume Stability of Iron Tailing-Steel Slag Aggregate Concrete

Sands were partially replaced by iron tailings as fine aggregates and stones were partially replaced by steel slags as coarse aggregates to prepare iron tailing-steel slag concrete in this research. And the strength, early crack resistance and long-term volume deformation of iron tailing-steel slag concrete were tested. The results show that iron tailings have negative effect on concrete strength when used as fine aggregates and steel slags are beneficial to concrete strength with a small adding amount. In addition, iron tailings with proper adding amount can inhibit the deformation of concrete caused by steel slags, in consequence of which early crack resistance and volume stability of concrete are improved.