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

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

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.
石灰与粉状高炉渣复合处理粘性土效果的优化研究
摘要:本文研究了粉质粘土的性能,分别用3、6、9和12%的矿渣(GGBS)和1%的生石灰作为活化剂稳定粉质粘土。通过考察阿特伯格极限、最大干密度、最佳含水率和直接承载指数,研究了生石灰- GGBS复合材料对粉质粘土直接性能的影响。研究了不同养护周期(1、7和28天)下处理土的力学特性(无侧限抗压强度、黏聚力和内摩擦角)的变化规律。当GGBS掺量增加至9%时,可导致最佳含水率、直接承载指标、无侧限抗压强度和抗剪强度参数的增加。相反,塑性指数和最大干密度却有所下降。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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