Microstructure of -Dicalcium Silicate after Accelerated Carbonation

被引：15

作者：

Liu, Songhui ^{[1
]}

Wang, Junjie ^{[2
]}

Zhang, Haibo ^{[1
]}

Guan, Xuemao ^{[1
]}

Qiu, Man ^{[1
]}

Dou, Zhenzhen ^{[1
]}

机构：

[1] Henan Polytech Univ, Sch Mat Sci & Engn, Jiaozuo 454000, Peoples R China

[2] China Bldg Mat Acad, State Key Lab Green Bldg Mat, Beijing 100024, Peoples R China

来源：

JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION | 2019年 / 34卷 / 01期

基金：

中国国家自然科学基金;

关键词：

dicalcium silicate; carbonation; silica gels; nanometer size pores; CEMENT; HYDRATION; BEHAVIOR; DIOXIDE;

D O I：

10.1007/s11595-019-2024-z

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present work presents the microstructure of -Ca2SiO4 (-C2S) after accelerated carbonation. The synthesis procedure of -C2S was examined first, and the crystalline and amorphous structure, the distribution and the pore structure of -C2S carbonation products were also determined by X-ray diffraction (XRD) quantitative analysis, simultaneous thermal analyzer (TG/DTA), Fourier transform-infrared spectroscopy (FT-IR), high resolution Si-29 magic angle spinning nuclear magnetic resonance (29Si NMR), N-2-sorption techniques, and scanning electron microscopy (SEM), respectively. Test results indicate that carbonation products are dramatically formed in the initial 2 h. The main carbonation products are crystalline calcite and amorphous three-dimensional network silica gels, which contain nanometer-sized pores. The calcite, silica gels and un-carbonated -C2S are distributed hierarchically.

引用

页码：122 / 126

页数：5

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