Optimization of the Combined Effect of Lime and Ground Granulated Blast-furnace Slag on Clayey Soil

Nasreddine, Diaf; Mustapha, Hidjeb; Khaled, Boudjellal; Mohamed, Boudiaf; Ihcene, Lamri

doi:10.2478/sspjce-2022-0007

Abstract

This work investigates the behavior of a silty clay stabilized with 3, 6, 9, and 12 % of ground granulated blast-furnace slag (GGBS), respectively, and 1 % of quicklime used as an activator. The influence of the composite (Quicklime - GGBS) on the immediate behavior of the silty clay is studied by examining the Atterberg limits, the maximum dry density, the optimum moisture content, and the immediate bearing index. The evolution, at different curing periods (1, 7, and 28 days), of the mechanical characteristics of the treated soil, namely unconfined compressive strength, cohesion, and internal angle of friction is also studied. The increase, up to a dosage of 9%, of the GGBS content, leads to an increase in the optimum moisture content, the immediate bearing index, the unconfined compressive strength, and shear strength parameters. Paradoxically, a decrease in the plasticity index and the maximum dry density was observed.

References

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Optimization of the Combined Effect of Lime and Ground Granulated Blast-furnace Slag on Clayey Soil

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