内掺氯离子与硫酸根离子在水泥净浆中的交互作用

doi:10.11896/cldb.17100005

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Abstract In order to investigate the interaction of chloride ion and sulfate ion in the cement paste at different curing time, cement paste using the salt solution mixed with chloride ion and sulfate ion, simulating the concentration of anions in the sea water in the South China Sea, as mixing water was micro-analyzed by the test methods such as XRD quantitative analysis, SEM and ion titration test methods. Under the condition of chloride ion doped, the results show that:the cement paste mixed with the salt solution of chloride ion as mixing water produced FS immediately. The existence of chloride ions can take the effect of restraining the generation of ettringite. In the condition of the experiment concentration, lea-ding the sulfate ion promoted the conversion from AFt to FS and increased the amount of chemically bound chloride ion. Chemical bonding that the participation of chloride ions formed by reaction of FS dominates an important role and sulfate ions played a supporting role at the early hydration. At the later stage of hydration, the adsorption of C-S-H gel to ions which was called physical adsorption, having inhibitory effects on the chemical binding of chloride ion.

Key words： doped chloride ion interaction chemical bonding physical absorption cement paste

Published: 28 April 2019

CLC number:

TU528

Fund:This work was financially supported by the National 973 Project (2015CB655102).

About author:: Wenjie Zangreceived her M.S. degree in June 2018 from Southeast University in engineering. ; Liping Guo, Ph.D., associate professor. Research interests:ultra-high ductility cementitious composites, durability of concrete, self-cleaning inorganic coating made by recycled waste solids.

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	ZANG Wenjie
	GUO Liping
	CAO Yuanzhang
	ZHANG Jian
	XUE Xiaoli

Cite this article:

ZANG Wenjie,GUO Liping,CAO Yuanzhang, et al. The Interaction Between Chloride Ion and Sulfate Ion Doped in Cement Paste[J]. Materials Reports, 2019, 33(8): 1317-1321.

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http://www.mater-rep.com/EN/10.11896/cldb.17100005 OR http://www.mater-rep.com/EN/Y2019/V33/I8/1317

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