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《Materials Review》 2018-S1
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Effect of Auxiliary Cementatious Materials on the Hardened Cement Paste Chloride Binding:an Overview

MA Hongqiang;YI Cheng;ZHU Hongguang;FAN Jingchong;LI Weijian;SHI Yangyang;CHEN Hongyu;School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing);  
The auxiliary cementatious materials are rich in SiO_2 and Al_2O_3,and participate in the secondary hydration reaction to produce more C-S-H gels,which reduces the alkalinity of hardened cement paste and has a significant influence on the binding of chloride ions to hardened cement paste.This paper summarizes the effects of slag,fly ash,silica fume,metakaolin and coal gangue on the binding of chloride ions to cement ion,and the mechanism of physical adsorption and chemical combination of chloride ion is analyzed.The chloride ion binding isotherms of auxiliary cementatious materials are suitable for Freundlich nonlinear adsorption relationship.Finally,the shortcomings of auxiliary cementatious materials combined with chloride ion research are discussed,which provide theoretical basis for the follow-up research work.
【Fund】: 国家自然科学基金(51578539);; 北京市自然科学基金(8164061)
【CateGory Index】: TU528
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