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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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Bouny, Véronique Baroghel
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2022Studying concrete blocks in real environments and comparing to laboratory experiments
- 2019Comparison of various cement pastes with SCM at different ages: phase assemblage evolutions
- 2019Quantification of Bound CO2 in various carbonated
- 2011Interactions between chloride ingress and carbonation in cementitious materials
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document
Comparison of various cement pastes with SCM at different ages: phase assemblage evolutions
Abstract
For economical and ecological reasons, supplementary cementitious materials (SCM) are increasingly used in concrete. Although having a lot of advantages, these concretes have different cement matrices and do not have the same evolution as a function of time as CEM I concretes.In this paper, themicrostructure of various cement pastes with/without SCM (slag, fly ash and metakaolin), has been investigated as a function of the curing time (28, 91 and 365 days). The microstructure was characterized not only by usual techniques such as XRD and TGA-DTA, but also by 29Si and 27Al NMR spectroscopy. The use of a combination of techniques for microstructural characterization allows to quantify the proportion of each cementitious phase. This quantification shows the evolution of the cementitious matrix as a function of the binder content and of the curing time. After one year, there is higher proportion of C-S-H in SCM cement pastes but there is still large amount of anhydrous phases. On the other hand, the alumina content in the C-S-H and the average length of C-S-H chains are higher for pastes with SCM than for OPC ones. Alumina phases proportions (AFt, AFm, TAH) are higher in SCM cement paste. There is more ettringite in CEM I paste and more AFm phase in SCM cement paste.