Influence of Steel Slag Beads Substituting Fine Aggregate on Durability of Concrete

Steel slag beads are a by-product of steel slag formed by direct gas quenching of liquid steel slag.In this paper,steel slag beads were used as substitutes for fine aggregate of concrete,and the influences of substitution rates（0%,20%,35%,and 50%） of steel slag beads for the fine aggregate on the durability of concrete were studied.The results show that the corrosion resistance of the concrete is adversely affected by the steel slag beads substituting natural sand.The corrosion resistance coefficient with 50% replacement rate of steel slag beads is lower than 75% after 60 dry and wet cycles.Moreover,the freezing-thawing resistance of steel slag bead concrete is better than that of the ordinary concrete,and it is proportional to the substitution rate of steel slag beads.The steel slag beads can improve the carbonization resistance of the concrete.