Results 211 to 220 of about 44,074,051 (232)

Review of Synthesis and Properties of Tobermorite, C‐S‐H(I), and C‐S‐H Gel

Journal of the American Ceramic Society, 1975
The investigation and characterization of tobermorites and the synthetic hydrates C‐S‐H(I) and C‐S‐H gel are reviewed, with particular attention to the application of X‐ray diffractometry, ir spectrophotometry, electron microscopy, and differential thermal analysis.
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Formation and carbonation of C-S-H in water

Cement and Concrete Research, 1985
Abstract The formation of calcium silicate hydrate (C-S-H) and its carbonation were investigated under two different atmospheric conditions. The C-S-H was prepared with calcium hydroxide solution and tetraethyl orthosilicate to have different Ca/Si mole ratios.
Kazutaka Suzuki, Tadahiro Nishikawa, Suketoshi Ito   +2 more
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Thermodynamic analysis of the C-S-H system

Advances in Cement Research, 1994
A series of experimental investigations has been conducted on the calcium silicate hydrate system at various C/S molar ratios (0·83–1·2), temperatures (175°C–190°C) and soaking times (4–12 h). The products of hydration were compared with the results predicted by an equilibrium calculation.
M. Djuric, M. Komljenovic, L. Petrasinovic-Stojkanovic, B. Zivanovic   +3 more
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The structure and stoichiometry of C-S-H

Cement and Concrete Research, 2004
Abstract This review relates to the models describing the structural evolution of calcium silicate hydrate (C-S-H) at the crystal–chemical level as a function of composition in terms of calcium to silicon ratio. The different models are compared and discussed in the light of recent spectroscopic and microscopic data. Taking into account the structure
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NMR and Infrared Spectroscopies of C-S-H and Al-Substituted C-S-H Synthesised in Alkaline Solutions

1998
(C,N)-(S,A)-H samples have been synthesised from mixes of different CaO/SiO2 and AI(OH)3/SiO2 ratios in stirred suspensions in more or less concentrated soda solutions. The stoichiometry and spectroscopic characteristics of samples have been studied by FTIR, 27A1 and 29Si MAS NMR spectroscopies. The structural changes induced by substitutions have been
Isabelle Lognot, Ivan Klur, André Nonat
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Chemical conversion of CSH in concrete

Cement and Concrete Research, 1994
The C-S-H and other hydrates in cement paste or concrete can be analyzed quantitatively by a novel analytical method using heavy water. The hardened cement paste was prepared by the change of water/cement ratio, by mixing with a salt solution or through exposure to CO2 gas.
Tadahiro Nishikawa, Kazutaka Suzuki
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Nanoengineering Microstructure of Hybrid C–S–H/Silicene Gel

ACS Applied Materials & Interfaces, 2020
Two-dimensional (2D) materials have been incorporated into calcium silicate hydrate (C-S-H) gel to enhance its mechanical performance for decades, while the modified C-S-H gel exhibits poor toughness, tensile strength, and ductility. In this work, we report a new design strategy and synthesis route to strengthen C-S-H interface by intercalating a ...
Qi Zheng, Jinyang Jiang, Chen Chen, Jin Yu, Xinle Li, Luping Tang, Shaofan Li   +6 more
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Thermodynamic of incongruent solubility of C–S–H

Advances in Cement Research, 2015
In most situations, the pore solution of cement-based materials is in thermodynamic equilibrium with the calcium silicate hydrates resulting from the hydration of (tri–di)calcium silicates. This equilibrium is, however, difficult to characterise, the solution phase being incongruent with respect to the calcium silicate hydrate phase.
Patrick Dangla, Mickael Thiery, Antoine Morandeau   +2 more
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Cs-137 immobilization in C-S-H gel nanopores

Physical Chemistry Chemical Physics, 2018
Molecular scale simulations of Cs-137 adsorption in a C-S-H gel: diffusion coefficients, residence times, and sorption sites per area.
Eduardo Duque-Redondo, Yamada Kazuo, Iñigo López-Arbeloa, Hegoi Manzano   +3 more
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Nanostructure of CSH: Current status

Advanced Cement Based Materials, 1993
This review relates to the CSH formed in pastes of portland or C3S hydrated under ordinary conditions. Pastes containing fly ash, slag, or other mineral additions are included. Some models of the structure at the nanometer or “crystal-chemical” level are described.
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