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Emmanuel, E., Paris, M. & Deneele, D. (2019) Insights on the clay reactivity in alkaline media: Beyond filler role for kaolin. Applied Clay Science, 181 105210.
Added by: Richard Baschera (2020-10-01 14:19:04) Last edited by: Richard Baschera (2020-10-01 14:19:50) |
| Type de référence: Article DOI: 10.1016/j.clay.2019.105210 Numéro d'identification (ISBN etc.): 0169-1317 Clé BibTeX: Emmanuel2019 Voir tous les détails bibliographiques  |
Catégories: ID2M, IMN Mots-clés: Alkaline activation, Depolymerized gel, Kaolin, naoh, Zeolite Créateurs: Deneele, Emmanuel, Paris Collection: Applied Clay Science |
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| Liens URLs http://www.science ... /S0169131719302686 |
| Résumé |
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Beside lime and hydraulic binders, alkaline activation recently emerges as a possible solution for soil stabilisation. Unfortunately, soil reinforcement by alkaline activation requires additional reactive aluminosilicate sources under ambient temperature. In this study, we focus on kaolin as a simplified model of kaolin-rich soils which show limited improvement on mechanical performance after lime treatment. Here, we explore the reactivity of kaolin after a two-step process combining NaOH activation and sodium silicate solution activation. We show that kaolin reactivity is greatly enhanced compared to sodium silicate solution activation only. After the two-step process, the formed phases differ depending on the setup of the NaOH activation. More interestingly, for well chosen conditions, a large amount of highly depolymerized gel is created, which is expected to improve the mechanical performance of treated kaolin clay soils.
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