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Rheological properties of thickened tailings and cemented paste tailings and the effects of mixture characteristics on shear behavior

Drissa Ouattara, Mamert Mbonimpa, Tikou Belem

In the proceedings of: GEO2010 Calgary: 63rd Canadian Geotechnical Conference & 6th Canadian Permafrost Conference

Session: W2-D

ABSTRACT: This experimental study assesses the rheological behaviour of thickened tailings (TT) and cemented paste backfills (CPB) in order to better understand the complex interactions between mixtures and shearing procedures. A torsional rheometer equipped with parallel plates was used. Two types of binder (general use Portland cement CP and a blend of CP and Slag in the ratio 1:4) and three binder contents (2, 4.5 and 6 wt%) were tested at 0, 1h, 2h and 4 hours curing times. The results showed that the studied CPBs present some thixotropic behaviour and that increased binder content increases the rheological parameters. In addition, the yield stress and viscosity strongly depend on binder type (CP or CP-Slag).

RÉSUMÉ: Cette étude expérimentale évalue le comportement rhéologique des résidus épaissis (RE) et des remblais cimentés en pâte (RPC) afin de comprendre l'interaction complexe entre les mélanges et les caractéristiques de cisaillement. Un rhéomètre à torsion équipée avec des plaques parallèles a été utilisé. Deux types de liant (ciment Portland ordinaire CP et un mélange CP-Slag) et trois teneurs en liant (2, 4,5 et 6 wt%) ont été testés à 0, 1, 2 et 4 h de temps de cure. Les résultats montrent que les RPC étudiés présentent un comportement thixotrope et que l'augmentation de la teneur en liant semble amplifier les paramètres rhéologiques. Aussi, le seuil de cisaillement et la viscosité dépendent fortement du type de liant.

Please include this code when submitting a data update: GEO2010_207

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Cite this article:
Drissa Ouattara; Mamert Mbonimpa; Tikou Belem (2010) Rheological properties of thickened tailings and cemented paste tailings and the effects of mixture characteristics on shear behavior in GEO2010. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GEO2010_154, author = Drissa Ouattara; Mamert Mbonimpa; Tikou Belem,
title = Rheological properties of thickened tailings and cemented paste tailings and the effects of mixture characteristics on shear behavior,
year = 2010
}