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《Concrete》 2016-01
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Hydration characteristics and activity evaluation of super fine ground granulated blast furnace slag

GAO Song;LI Qiuyi;WU Benqing;YUE Gongbing;Civil Engineering Department,Qingdao Technological University;Qingdao High-tech District Engineering Quality Test Ltd.;Collaborative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone,Qingdao Technological University;  
The activity index measure methods were comparatively studied,the activity of super fine ground granulated blast furnace slag is hereby measured by means of improved methods,and the hydration mechanism of super fine ground granulated blast furnace slag-cement system is also studied as well as its hydration produces.The results indicate that thecement system has the highest hydration activity index of 116%after it was cured in the NaOH solution.The XRD analysis shows that the main hydration produces of super fine ground granulated blast furnace slag-cement system are Ca(OH)_2 and AFt.The AFt characteristic peaks at early hydration stage increases with the proportion of super fine ground granulated blast furnace slag,the early age strength of this cementitious system sources from AFt network.Consequently The final strength is caused by CSH gel network since the super fine ground granulated blast furnace slag consumes Ca(OH)_2,which produced by cement hydration.
【Fund】: 国家自然科学基金项目(51378269);(51178230);; 高性能土木工程材料国家重点实验室开放基金资助(2013CEM010)
【CateGory Index】: TU528
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