Calcium silicate hydrate (C-S-H) gel solubility data and a discrete solid phase model at 25 °C based on two binary non-ideal solid solutions

Walker, Colin; Sutou, Shunkichi; Oda, Chie; Mihara, Morihiro; Honda, Akira

doi:10.1016/j.cemconres.2015.07.006

Cited by 87 publications

(59 citation statements)

References 156 publications

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“…In the following, we will explore the application of the ideal model, so CH is excluded as a component of the solid solution. Nonideal solution models of C–S–H have been considered in the past, but they are considerably more complicated and not more accurate, at least in terms of mere fitting of published solubility data, than the one presented here.…”

Section: Theorymentioning

confidence: 99%

“…The model developed here is intended to describe, and has been compared to measurements on, C–S–H formed from aqueous solutions of calcium and silicate ions, just like most of the existing C–S–H solid solution models of which the authors are aware . This makes the current model applicable, for example, to the C–S–H product of tricalcium or dicalcium silicate hydration.…”

Section: Comparison To Datamentioning

confidence: 99%

“…The primary weakness of this simpler ideal solid solution model is that it is not directly tied to the underlying molecular structure of the material, as some more complex nonideal models have striven to be . In particular, the current model does not require any particular composition of the end‐members, such as one of the tobermorite or jennite minerals that are often used for that purpose . Instead, as will be shown, the ideal solid solution model can be fit to determine the compositions of either two or three end‐members that provide the best agreement with published C–S–H solubility data.…”

Section: Introductionmentioning

confidence: 99%

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An Ideal Solid Solution Model for C–S–H

Bullard

Scherer

2016

J. Am. Ceram. Soc.

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A model for an ideal solid solution, developed by Nourtier-Mazauric et al. [Oil & Gas Sci. Tech. Rev. IFP, 60 [2] (2005) 401], is applied to calcium-silicate-hydrate (C-S-H). Fitting the model to solubility data reported in the literature for C-S-H yields reasonable values for the compositions of the end-members of the solid solution and for their equilibrium constants. This model will be useful in models of hydration kinetics of tricalcium silicate because it is easier to implement than other solid solution models, it clearly identifies the driving force for growth of the most favorable C-S-H composition, and it still allows the model to accurately capture variations in C-S-H composition as the aqueous solution changes significantly at early hydration times.

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Section: Theorymentioning

confidence: 99%

Section: Comparison To Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Ideal Solid Solution Model for C–S–H

Bullard

Scherer

2016

J. Am. Ceram. Soc.

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“…Shortly after submission of this article, a similar study by Walker et al [54] was published. Their work included new solubility data for C-S-H gels in the region C/S ≤ 0.83 and a model for C-S-H gel dissolution in the solid C/S range 0 to 2.7.…”

Section: Appendix Amentioning

confidence: 81%

“…Walker et al [54] also developed a discrete solid phase model for application to C-S-H gel dissolution for the solid C/S range 0 to 2.7. The model is based on two underlying non-ideal solid solution models developed for the C/S regions above and below the congruent point.…”

Section: Appendix Amentioning

confidence: 98%

Leaching behaviour of low Ca:Si ratio CaO–SiO2–H2O systems

Swanton¹,

Heath²,

Clacher³

2016

Cement and Concrete Research

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A Multiscale and Multimethod Approach to Assess and Mitigate Concrete Damage Due to Alkali–Silica Reaction

et al. 2022

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Alkali–silica reaction (ASR) is a chemical reaction within concrete which can lead over time to cracking and spalling. Due to the complexity of the problem, it still causes damage to concrete constructions worldwide. The study aims to illustrate the interdisciplinary research of the German Federal Institute for Materials Research and Testing (BAM) within the last 20 years, considering all aspects of ASR topics from the macro‐ to the micro‐level. First, methods for characterization and assessment of ASR risks and reaction products used at BAM are explained and classified in the international context. Subsequently, the added value of the research approach by combining different, preferably nondestructive, methods across all scales is explained using specific examples from a variety of research projects. Aspects covered range from the development of new test setups to assess aggregate reactivity, to analysis of microstructure and reaction products using microscopical, spectroscopical, and X‐ray methods, to the development of a testing methodology for existing concrete pavements including in‐depth analysis of the visual damage indicator and the deicing salt input using innovative testing techniques. Finally, research regarding a novel avoidance strategy that makes use of internal hydrophobization of the concrete mix is presented.

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Calcium silicate hydrate (C-S-H) gel solubility data and a discrete solid phase model at 25 °C based on two binary non-ideal solid solutions

Cited by 87 publications

References 156 publications

An Ideal Solid Solution Model for C–S–H

An Ideal Solid Solution Model for C–S–H

Leaching behaviour of low Ca:Si ratio CaO–SiO2–H2O systems

A Multiscale and Multimethod Approach to Assess and Mitigate Concrete Damage Due to Alkali–Silica Reaction

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