Abstract:

The concrete of C20，C30 and C40 were prepared by using fly ash，slag powders and steel slag powders as admixture instead of 25%cement.  The workability and compressive strength of concrete samples were tested;the result showed that  three  kinds of  admixture  have different of imprrovement to workability of concrete.  Comparing with datum concrete，the concrete adding admixture has low early strength and its long-term strength increased rapidly.  The growth of the late strength of concrete with steel slag powder is the fastest.

Key words: steel slag powder, concrete, slag powder, fly ash, workability, compressing strength