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《Bulletin of the Chinese Ceramic Society》 2012-02
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Study on the Effect of Different Activators on Activation of Steel Slag

LI Yu-xiang1,WANG Zhen-xing2,FENG Min1,LI Hui1(1.Key Laboratory of Western Architecture and Technology,College of Materials Science and Engineering, Xi'an University of Architecture and Technology,Xi'an 710055,China;2.CSCEC Ready Mix Co.,Ltd.,Wuhan 430074,China)  
In this paper,different activators were used to improve the steel slag activity,such as water glass,sodium hydroxide,sodium sulfate,silica fume,sodium aluminate and compound activator.The effect of different activators on the steel slag activity and the activation mechanism were systemically investigated.The microstructure and mineral phases of hydrated products of the steel slag cementitious materials prepared by different activaors were characterized by SEM and XRD,respectively.The compressive strength of different ages were compared.The results show that the activators can promote the increase of hydrated calcium silicate gel and the formation of ettringite in steel slag hydrated products,destroy the network structure of vitreous body in steel slag,and increase the compactness of steel slag hydrated paste.Silica fume displays relatively better activation effect as an activator,and the 28 d compressive strength of the prepared cement test block can be up to 15.9 MPa.
【Fund】: 陕西省自然科学基础研究计划项目资助(2011JQ7011)
【CateGory Index】: X757
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