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Journal of Sol-Gel Science and Technology

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01.08.2019 | Original Paper: Sol-gel and hybrid materials for energy, environment and building applications

A comparison between experimental and theoretical Ca/Si ratios in C–S–H and C–S(A)–H gels

verfasst von: Moisés Martín-Garrido, M. Teresa Molina-Delgado, Sagrario Martínez-Ramírez

Erschienen in: Journal of Sol-Gel Science and Technology | Ausgabe 1/2020

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Abstract

The main component of the cement hydration, are both, the calcium silicate hydrate (C–S–H) and calcium silicate hydrate with Al (C–S(A)–H), whose composition is characterized by its calcium to silicon ratio (Ca/Si), which normally varies from 0.6 to 1.6. The theoretical Ca/Si ratios of the synthesized gels were compared with those of the experimental gels, which were determined by inductively coupled plasma atomic emission spectroscopy (ICP-OES). In addition, the microstructure of the gels was studied by spectroscopic techniques: infrared and Raman spectroscopy and nuclear magnetic resonance. By the double-decomposition method used in this work (1 day at 25 °C, inert atmosphere and pH = 12.3), only C–S–H and C–S(A)–H gels with a maximum Ca/Si ratio ranging from 0.8 to 1.0 were synthesized. However, the structures of the gels are slightly different as the Ca/Si ratio increases.

Vorheriger Artikel Evolution of mineral phases and microstructure of high efficiency Si–Ca–K–Mg fertilizer prepared by water-insoluble K-feldspar

Nächster Artikel Development of new inorganic shape stabilized phase change materials with LiNO3 and LiCl salts by sol-gel method

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Titel: A comparison between experimental and theoretical Ca/Si ratios in C–S–H and C–S(A)–H gels
verfasst von: Moisés Martín-Garrido
M. Teresa Molina-Delgado
Sagrario Martínez-Ramírez
Publikationsdatum: 01.08.2019
Verlag: Springer US
Erschienen in: Journal of Sol-Gel Science and Technology / Ausgabe 1/2020
Print ISSN: 0928-0707
Elektronische ISSN: 1573-4846
DOI: https://doi.org/10.1007/s10971-019-05097-x

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