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《Journal of Shaoxing University(Natural Science)》 2018-03
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Effect of Chloride Ion on Free Nitrite in Cement Paste

DAI Yanhua;LIU Junzhe;XING Xiangwei;YANG Mengna;School of Civil Engineering,Shaoxing University;School of Architectural,Civil Engineering and Environment,Ningbo University;  
In the experiment of external permeating chloride in cement paste,the influence of chloride on the content and distribution of free nitrite in cement paste was researched by chemical quantitative analysis method,and the action mechanism was discussed by the micro means of X-ray diffraction and scanning electron microscopy. The results indicate that extravasation Cl~-produces more free NO_2~- in the paste owing to the competitive adsorption of NO_2~- on the surface of C—S—H and the chemical substitution of Cl~-for NO_2~-AFm;the concentration of nitrite ion on the surface of cement paste eroded by chloride ion is the lowest,but reaches the highest value 10 mm from the erosion surface; the concentration decreases with the deepening of erosion surface.
【CateGory Index】: TU528
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Chinese Journal Full-text Database 8 Hits
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