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- W2020807712 abstract "In this paper, Class F fly ash, sulphate-resistant cement, ground granulated blast furnace slag (GGBFS) and lime mixed with fibres are evaluated as potential stabilisers in enhancing the strength and volume change properties of soft, expansive and sulphate-rich soils. As part of the research evaluation, a comprehensive laboratory experimental programme was designed and conducted on four different subgrade soils. Two dosage levels of each stabiliser and three curing periods were investigated. Strength and volume change behavioural tests, including unconfined compressive strength, vertical swell, linear shrinkage and Atterberg tests, were conducted on both control and stabilised soils. Test results showed that the sulphate-resistant cement and lime mixed with fibres provided the most effective stabilisation on all four soils. Both fly ash and GGBFS stabilisation methods provided average-to-moderate improvements in soil properties. Statistical ANOVA analysis of variance on all test results indicated that the effectiveness of all four stabilisation methods is statistically significant. Mechanisms that influence each soil property variation due to chemical treatments, dosage levels and curing periods are explained. Additionally, cost comparisons among the stabilisers are presented. Dans cet exposé, nous avons évalué le potentiel stabilisant de la cendre volante de classe F, du ciment résistant au sulfate, du sable de laitier broyé (GGBFS) et de la chaux mélangée à des fibres pour améliorer la résistance et les propriétés de changement volumique des sols tendres, expansifs et riches en sulfate. Dans le cadre de cette étude, nous avons mis au point un programme complet d'essais en laboratoire, essais menés sur quatre sols différents de fond de forme. Nous avons étudié deux niveaux de dosage pour chaque stabilisateur et trois périodes de traitement. Nous avons fait des essais Atterberg et des essais de comportement pour la résistance et le changement volumique avec essais de résistance à la compression libre, de gonflement vertical et de retrait linéaire sur des sols étalon et des sols stabilisés. Les résultats ont montré que le ciment résistant au sulfate et la chaux mélangée à des fibres donnaient la stabilisation la plus efficace sur les quatre sols. Les méthodes de stabilisation à la cendre volante et GGBFS ont donné des améliorations moyennes à médiocres des propriétés du sol. Les analyses statistiques ANOVA sur tous les résultats des essais ont indiqué que l'efficacité des quatre méthodes de stabilisation était signifiante statistiquement. Nous expliquons les mécanismes qui influent sur chaque variation de propriété des sols due aux traitements chimiques, aux niveaux de dosage et aux temps de traitement. De plus, nous présentons des comparaisons de coûts entre divers stabilisateurs." @default.
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- W2020807712 date "2003-01-01" @default.
- W2020807712 modified "2023-10-16" @default.
- W2020807712 title "Experimental evaluations of stabilisation methods for sulphate-rich expansive soils" @default.
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- W2020807712 doi "https://doi.org/10.1680/grim.2003.7.1.25" @default.
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