Study on preparation of high-active auxiliary cementitious materials with activating converter steel slag

By means of chemical activation and grinding,the activity of steel slag was activated to prepare steel slag cementitious materials with high strength that could be added in cement with higher content.The internal relations between microstructure and macroscopic properties were analyzed by XRD,SEM and mercury intrusion.The results showed that the converter steel slag could be used to prepare high-active auxiliary cementitious materials by the comprehensive effect of chemical activation and grinding.The optimal grinding time was 60min.The M additive(mixture ratio of triisopropanolamine,polyethylene glycol and de-ionized water was 6∶4∶10) had best active effect on steel slag.The content of converter steel slag in cement could be up to 33% and the 28d compressive stength of steel slag cement was 50.4MPa.