Microstructural evolution and mechanical behaviour of alkali activated fly ash binder treated clay

Coudert, Elodie; Deneele, Dimitri; Russo, Giacomo; Vitale, Enza; Tarantino, Alessandro

doi:10.1016/j.conbuildmat.2021.122917

Cited by 9 publications

(2 citation statements)

References 32 publications

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“…7a shows the 29 Si MAS-NMR spectrum for the fly ash alone compared with the spectra of the fly ash following alkali activation (after 28 days and 6 months). The appearance of a new resonance located at -85 ppm is associated with the formation of the binding phase and it corresponds to Q 2 -type silicon environments in chain structure that resembles the one of Calcium Silicate Hydrates encountered in Portland Cement (Coudert et al, 2018, Coudert et al, 2021. From 28 days to 6 months, the resonance associated with the binding phase does not change neither in amplitude nor in chemical shift value indicating a negligible evolution of the binding phase in terms of both chemistry and atomic structure beyond 28 days.…”

Section: Timescale Of Binding Phase Formationmentioning

confidence: 93%

Mechanical behaviour of compacted kaolin clay stabilised via alkali activated calcium-rich fly ash binder

Coudert

Russo

Deneele

et al. 2022

Geomechanics for Energy and the Environment

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Section: Timescale Of Binding Phase Formationmentioning

confidence: 93%

Mechanical behaviour of compacted kaolin clay stabilised via alkali activated calcium-rich fly ash binder

Coudert

Russo

Deneele

et al. 2022

Geomechanics for Energy and the Environment

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“…Coudert et al’s [ 122 ] study was primarily concerned with the application of an alkali activated fly ash-based binder to improve the engineering properties of soft clay-rich soils and to replace conventional stabilisers (lime or cement). By using optical microscopy, microstructural measurements of the alkali activated fly ash binder treated soil over time were made.…”

Section: Reinforcement In Kaolin Ceramic Geopolymersmentioning

confidence: 99%

Geopolymer Ceramic Application: A Review on Mix Design, Properties and Reinforcement Enhancement

et al. 2022

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Geopolymers have been intensively explored over the past several decades and considered as green materials and may be synthesised from natural sources and wastes. Global attention has been generated by the use of kaolin and calcined kaolin in the production of ceramics, green cement, and concrete for the construction industry and composite materials. The previous findings on ceramic geopolymer mix design and factors affecting their suitability as green ceramics are reviewed. It has been found that kaolin offers significant benefit for ceramic geopolymer applications, including excellent chemical resistance, good mechanical properties, and good thermal properties that allow it to sinter at a low temperature, 200 °C. The review showed that ceramic geopolymers can be made from kaolin with a low calcination temperature that have similar properties to those made from high calcined temperature. However, the choice of alkali activator and chemical composition should be carefully investigated, especially under normal curing conditions, 27 °C. A comprehensive review of the properties of kaolin ceramic geopolymers is also presented, including compressive strength, chemical composition, morphological, and phase analysis. This review also highlights recent findings on the range of sintering temperature in the ceramic geopolymer field which should be performed between 600 °C and 1200 °C. A brief understanding of kaolin geopolymers with a few types of reinforcement towards property enhancement were covered. To improve toughness, the role of zirconia was highlighted. The addition of zirconia between 10% and 40% in geopolymer materials promises better properties and the mechanism reaction is presented. Findings from the review should be used to identify potential strategies that could develop the performance of the kaolin ceramic geopolymers industry in the electronics industry, cement, and biomedical materials.

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Alkaline Activation of Volcanic Ash as Binder for Soil Improvement

Costa

Vitale

Cappelletti

et al. 2023

Springer Series in Geomechanics and Geoengineering

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Microstructural evolution and mechanical behaviour of alkali activated fly ash binder treated clay

Cited by 9 publications

References 32 publications

Mechanical behaviour of compacted kaolin clay stabilised via alkali activated calcium-rich fly ash binder

Mechanical behaviour of compacted kaolin clay stabilised via alkali activated calcium-rich fly ash binder

Geopolymer Ceramic Application: A Review on Mix Design, Properties and Reinforcement Enhancement

Alkaline Activation of Volcanic Ash as Binder for Soil Improvement

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