Sulfate erosion is one of the main factors that affect the durability of high performance concrete( HPC). The steel slag compound admixture was added into the HPC to improve its sulfate erosion resistance. Sodium sulfate( Na_2SO_4) solution( 5 wt%) was used as erosion medium,and the drying-wetting cycle accelerated erosion tests( each cycle takes 24 h with wetting time of 15 h and drying time of 6 h) were finished by the HPC samples added with steel slag compound admixture and reference samples. The cycle n...