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Stabilisation à froid de matériaux montmorillonitiques par du ciment Portland
Résumé Montmorillonite-based materials are not well-suited to the cold stabilization process of extrusion-shaped clay products. First, we sought to determine, from among the reasons which could explain the difficulty in stabilizing montmorillonite with Portland cement, if one of the main causes was this clay's capacity to exchange and adsorb cations from its surroundings. Indeed, in the montmorillonite-cement mixture, the $ Ca^{2+} $ ions freed by the binder are exchanged and captured by the clay particles, which prevents hydration reactions of the cement. In a second stage, we treated mortmorillonite before mixing it with cement. The treatment consisted of saturating this kind of clay with $ Ca^{2+} $ ions. It then appeared that the expansive properties of this clay must be the major factor in the behaviour of montmorillonite-cement mixtures.
Stabilisation à froid de matériaux montmorillonitiques par du ciment Portland
Résumé Montmorillonite-based materials are not well-suited to the cold stabilization process of extrusion-shaped clay products. First, we sought to determine, from among the reasons which could explain the difficulty in stabilizing montmorillonite with Portland cement, if one of the main causes was this clay's capacity to exchange and adsorb cations from its surroundings. Indeed, in the montmorillonite-cement mixture, the $ Ca^{2+} $ ions freed by the binder are exchanged and captured by the clay particles, which prevents hydration reactions of the cement. In a second stage, we treated mortmorillonite before mixing it with cement. The treatment consisted of saturating this kind of clay with $ Ca^{2+} $ ions. It then appeared that the expansive properties of this clay must be the major factor in the behaviour of montmorillonite-cement mixtures.
Stabilisation à froid de matériaux montmorillonitiques par du ciment Portland
Amor, K. Ben (author) / Temimi, M. (author) / Camps, J. P. (author) / Laquerbe, M. (author)
1997
Article (Journal)
French
Stabilisation à froid de matériaux montmorillonitiques par du ciment Portland
| Springer Verlag | 1997
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