| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Bernard, Ellina
Swiss Federal Laboratories for Materials Science and Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024A critical review of magnesium silicate hydrate (M-S-H) phases for binder applicationscitations
- 2023Phase changes in cementitious materials exposed to saline solutionscitations
- 2023MgO-based binderscitations
- 2023Effect of Carbonates on the Formation of Magnesium Silicate Hydrates (M-S-H) and Magnesium Alumino Silicate Hydrates (M-A-S-H)citations
- 2023MgO‐based cements – Current status and opportunitiescitations
- 2022Effect of carbonates on the formation of magnesium silicate hydratescitations
- 2022Research progress on magnesium silicate hydrate phases and future opportunitiescitations
- 2022Stability of hydrotalcite (Mg-Al layered double hydroxide) in presence of different anionscitations
- 2021Immobilization of (Aqueous) Cations in Low pH M-S-H Cementcitations
- 2019Alkali binding by magnesium silicate hydratescitations
- 2017Formation of magnesium silicate hydrates (M-S-H)citations
- 2017Magnesium silicate hydrate (M-S-H) characterization : temperature, calcium, aluminium and alkali ; Caractérisation de phases silico-magnésiennes (M-S-H et M-A-S-H) en fonction de la température, de la présence de calcium et en condition alcalines
Places of action
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article
Stability of hydrotalcite (Mg-Al layered double hydroxide) in presence of different anions
Abstract
MgO contained in cementitious materials is experimentally observed to precipitate as poorly crystalline hydrotalcite (Mg-Al LDH). However, the geochemical modelling of hydrotalcite is challenging due to the lack of consistent thermodynamic dataset for this phase. Hydrotalcites with Mg/Al = 2 were synthesised in the presence of NaHCO 3 , NaCl, Na 2 SO 4 , NaNO 3 , and NaOH. Mass balance, XRD and FT-IR indicated the incorporation of the anions in the interlayer together with some carbonate. The crystallinity of the phase increased depending on the anion: SO 4 2- < Cl - < NO 3 - < OH - < CO 3 2- . An in-situ increase of temperature monitored by XRD and TGA showed that the stability of the hydrotalcite structure with temperature also depended on the incorporated anion. The solubility products were calculated based on the solution analysis of samples re-equilibrated at different temperatures, while the entropy and heat capacity were obtained from the additivity method or the molar volume. A simple solid-solution model for hydrotalcite containing CO 3 , OH, SO 4 , Cl and NO 3 is suggested.