scholarly journals Calcium silicate hydrate – in‐situ development of the silicate structure followed by infrared spectroscopy

2021 ◽  
Author(s):  
Elisabeth John ◽  
Dietmar Stephan
Keyword(s):  
Infrared Spectroscopy ◽  
Calcium Silicate ◽  
Calcium Silicate Hydrate ◽  
Silicate Structure

Preparation of magnetic calcium silicate hydrate for the efficient removal of uranium from aqueous systems

RSC Advances ◽  
2015 ◽  
Vol 5 (8) ◽  
pp. 5904-5912 ◽  
Author(s):  
Hongsen Zhang ◽  
Qi Liu ◽  
Jun Wang ◽  
Jingyuan Liu ◽  
Huijun Yan ◽  
...  
Keyword(s):  
Calcium Silicate ◽  
Calcium Silicate Hydrate ◽  
Aqueous Systems ◽  
Magnetic Adsorbent ◽  
Efficient Removal ◽  
Adsorption Characteristics ◽  
Growth Method

Preparation of a magnetic adsorbent for uranium with rapidly and effectively adsorption characteristics via sonochemical and in situ growth method.

In situ TEM observation of calcium silicate hydrate nanostructure at high temperatures

2021 ◽  
Vol 149 ◽  
pp. 106579
Author(s):  
Qi Zheng ◽  
Jinyang Jiang ◽  
Xinle Li ◽  
Karen C. Bustillo ◽  
Haimei Zheng
Keyword(s):  
High Temperatures ◽  
Calcium Silicate ◽  
Calcium Silicate Hydrate ◽  
In Situ Tem

scholarly journals Evaluation of the nanostructure of calcium silicate hydrate based on atomic force microscopy-infrared spectroscopy experiments

2021 ◽  
Vol 10 (1) ◽  
pp. 807-818
Author(s):  
Zheyu Zhu ◽  
Zhongping Wang ◽  
Yue Zhou ◽  
Yuting Chen ◽  
Long Zhou ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Infrared Spectroscopy ◽  
Calcium Silicate ◽  
Calcium Silicate Hydrate ◽  
Silicon Oxide ◽  
Mechanical Performance ◽  
Experimental Information ◽  
Force Microscopy ◽  
Atomic Force ◽  
Cement Strength

Abstract Calcium silicate hydrate (C–S–H) is the main product of cement hydration, which forms the microstructure of cement via the stacking of basic nanocrystals or gel units, and has a substantial influence on the mechanical performance of cement. Tetrahedron chains of silicon oxide form the main nanoscale structure of basic C–S–H units. Evaluation on the nanostructure of these tetrahedron chains facilitates to understand the source of cement strength. This article first introduced the atomic force microscopy-infrared spectroscopy (AFM-IR) technique into evaluating the nanostructure of C–S–H. The nano infrared spectroscopy of stacking C–S–H nanograins and tetrahedron spatial distribution mapping was obtained. The results demonstrate that the relative quantity of tobermorite-like and jennite-like units in C–S–H nanograins can be analyzed by AFM-IR. The stacking between C–S–H particles is facilitated to a large extent by silicate ( SiO 4 2 − {\text{SiO}}_{4}^{2-} ) tetrahedron chains formed of three tetrahedrons bridged by two oxygen atoms (i.e., Q2 chains), and there are Q2 chains acting as bridges between C–S–H particles. The proportions of different types of Q2 chains available for facilitating C–S–H particle stacking vary at the nanoscale. AFM-IR spatial mapping demonstrate that the orientations of these Q2 chains are not evenly distributed. These findings provide experimental information of the stacking C–S–H gaps.

Structure of Calcium Silicate Hydrate (C-S-H): Near-, Mid-, and Far-Infrared Spectroscopy

2004 ◽  
Vol 82 (3) ◽  
pp. 742-748 ◽  
Author(s):  
Ping Yu ◽  
R. James Kirkpatrick ◽  
Brent Poe ◽  
Paul F. McMillan ◽  
Xiandong Cong
Keyword(s):  
Infrared Spectroscopy ◽  
Calcium Silicate ◽  
Calcium Silicate Hydrate ◽  
Far Infrared ◽  
Far Infrared Spectroscopy

Dependence of the intrinsic phase structure of Bi2O3 catalysts on photocatalytic CO2 reduction

2021 ◽  
Vol 11 (6) ◽  
pp. 2021-2025
Author(s):  
Liujin Wei ◽  
Guan Huang ◽  
Yajun Zhang
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Phase Structure ◽  
Co2 Reduction ◽  
Fourier Transform Infrared ◽  
Time Resolved ◽  
Dependent Activity

The combination of time-resolved transient photoluminescence with in-situ Fourier transform infrared spectroscopy has been conducted to investigate the intrinsic phase structure-dependent activity of Bi2O3 catalyst for CO2 reduction.

Multiple ions transport and interaction in calcium silicate hydrate gel nanopores: Effects of saturation and tortuosity

2021 ◽  
Vol 283 ◽  
pp. 122638
Author(s):  
Zhiyong Liu ◽  
Yuncheng Wang ◽  
Dong Xu ◽  
Chuyue Zang ◽  
Yunsheng Zhang ◽  
...  
Keyword(s):  
Calcium Silicate ◽  
Calcium Silicate Hydrate ◽  
Ions Transport
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