Effect of Fibre Reinforcement on Behaviour of Cement Stabilized Fine Grained Soils

Ashkan Abouzar, Mahmood Reza Abdi

In the proceedings of: GeoMontréal 2013: 66th Canadian Geotechnical Conference; 11th joint with IAH-CNC

Session: Soil Stabilization I

ABSTRACT: To meet the ever-increasing construction demands around the world during recent years, reinforcement and stabilization methods have been widely used by geotechnical engineers to improve the performances and behaviour of fine grained soils. Although cement stabilization of fine grained soils increases their compressive strength, at the same time reduces their ductility. Research has shown that fibre addition modifies the brittleness of soils. In the present study kaolinite was stabilized with various percentages of cement (i.e. 1, 3 and 5% by dry weight of soil) and reinforced with different percentages of polypropylene fibre (i.e. 0.05, 0.15, 0.25 and 0.35% by dry weight of soil). Samples were initially cured at 35 C for 1, 7 and 28 days at 90% relative humidity and then subjected to unconfined compression test. Results showed that adding polypropylene fibre to cement stabilized kaolinite mixtures increases both the unconfined compressive strength and the ductility. The amounts of cement and fibre contents as well as the curing period were found to have the most effect on the results obtained. The more ductile the stabilized and reinforced composition, the less the cracks in roads or waste landfill covers.

RÉSUMÉ: Afin de rencontrer les exigences globales en matière de construction qui sont en hausse depuis plusieurs années, les ingénieurs géotechniques commencent à utiliser des méthodes de stabilisation et de renforcement pour améliorer la performance de sols à grains fins. Stabiliser le ciment en utilisant le sol à grains fins fait augmenter sa résistance à la des sols. Dans la présente étude, on a utilisé du ciment en plusieurs proportions (notamment 1, 3 et 5% par poids sec) pour stabiliser le mélange de kaolinite, et des fibres de polypropylene en plusieurs proportions (notamment 0,05, 0,15, 0,25 et 0,35% par poids sec) pour le renforcer. Le cure des échjour, de 7 jours et de 28 jours, à une humidité relative de 90%. Ensuite on a soumis les échantillons à un essai de aux mélanges de kaolinite stabilisé avec le ciment a fait augmenter la résistance à la compression simple ainsi que la ductilité. On a également nt sur les résultats, et que les compositions mieux renforcées et stabilisées ont pu former des couvertures de décharge et des chaussées avec moins de fissures.

Please include this code when submitting a data update: GEO2013_262

Access this article:
Canadian Geotechnical Society members can access to this article, along with all other Canadian Geotechnical Conference proceedings, in the Member Area. Conference proceedings are also available in many libraries.

Cite this article: