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Abidar, A., Bouchenafa, O., Hamzaoui, R., Mansoutre, S., Paris, M., Barnes-Davin, L., Capra, C., Classen, B. & Florence, C. (2023) Investigating the mechanisms of hydraulicity regeneration in pure C3S paste. Construction and Building Materials, 409 134132.
Added by: Richard Baschera (2024-02-19 15:33:22) Last edited by: Richard Baschera (2024-02-19 15:43:41) |
| Type de référence: Article DOI: 10.1016/j.conbuildmat.2023.134132 Numéro d'identification (ISBN etc.): 0950-0618 Clé BibTeX: Abidar2023 Voir tous les détails bibliographiques  |
Catégories: IMN Mots-clés: Heat treatment, Hydraulic regeneration, Recycling, Rietveld, Si-NMR, Structure Créateurs: Abidar, Barnes-Davin, Bouchenafa, Capra, Classen, Florence, Hamzaoui, Mansoutre, Paris Collection: Construction and Building Materials |
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| Liens URLs https://www.scienc ... /S0950061823038503 |
| Résumé |
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The study introduces a technique to regenerate hydraulicity in C3S by thermally treating powders from crushed hydrated alite cubes at various temperatures (ranging from 400 °C to 800 °C). Several characterization techniques, including XRD, FTIR, 29Si-NMR, SEM, and helium pycnometer were used to comprehend the mechanisms behind hydraulicity regeneration. XRD analysis showed anhydrous binder powders with β-C2S, Calcite, and calcium oxide phases after heat treatment, with β-C2S appearing at 600 °C. Hydration of regenerated binders resulted in Portlandite and Calcite phases, and the amorphous phase increased with curing due to the C-S-H formation confirmed by FTIR peaks. NMR analysis revealed distinct characteristics in TP800's C-S-H compared to the original C3S paste, primarily due to shorter chain lengths.
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