Sulfate Ions Immobilization of Calcined Layered Double Hydroxides in Hardened Cement Paste and Concrete

被引：6
|
作者：
Ma Juntao [1 ,2 ,4 ]
Wang Daguang [2 ]
Duan Ping [3 ,4 ]
Shi Yanke [1 ,2 ]
机构：
[1] Yellow River Inst Hydraul Res, MWR Ctr Levee Safety & Dis Prevent, Zhengzhou 450003, Peoples R China
[2] North China Univ Water Resources & Elect Power, Int Joint Res Lab Ecobldg Mat & Engn Henan, Zhengzhou 450045, Peoples R China
[3] China Univ Geosci, Fac Mat Sci & Chem, Minist Educ, Engn Res Ctr Nanogeomat, Wuhan 430074, Peoples R China
[4] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Peoples R China
来源：
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION | 2019年 / 34卷 / 06期
基金：
中国国家自然科学基金;
关键词：
calcined layered double hydroxides (CLDHs); sulfate ions; immobilization; hardened cement paste; HYDROTALCITE; ADSORPTION;
D O I：
10.1007/s11595-019-2205-9
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The sulfate ions immobilization behavior of calcined layered double hydroxides (CLDHs) in the hardened cement paste was investigated. The experimental results show that the sulfate ions in cement paste are immobilized by CLDHs to reconstruct the layered structure and aggregate around CLDHs. The immobilization amount of sulfate ions by CLDHs reaches 4.74x10(-3) mol/g, while the increasing amount indicates non-linear relation with the addition of CLDHs. The incorporation of CLDHs decreases the amount of ettringite formed to limit the expansion of cement paste, which decays the sulfate reaction to enhance the sulfate resistance of concrete.
引用
收藏
页码：1400 / 1407
页数：8
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