Steel slag is a major industrial waste. Because of poor volume stability, its utilization was limited. We adopted polyphosphate modified steel slag and tailings to produce the autoclaved brick. The effects of various factors influencing the performance of brick were investigated, and the results were obtained: forming water 9%, forming pressure 20MPa, curing regime 4(temperature rising, hr)-4(temperature holding at 180°C, hr)-natural cooling (temperature dropping). With the content of modified steel slag in brick increased from 11% to 25%, the content of cement reduced from 7% to 5%, the compressive strength value increased from 11.6MPa to 22.1MPa.
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