Coupled Effect of Granite Sand and Calcium Lignosulphonate on the Strength Behavior of Cohesive Soil

Abstract

This paper assesses the significance of stabilizing clay soil with calcium lignosulphonate (CLS) and granite sand (GS). Unconfined compressive strength (qc) and hydraulic conductivity (K) are taken as performance indicators and the effect of varying dosages of GS (30%, 40%, and 50%) and CLS (0.5%, 1%, 1.5%, and 2%) at different curing periods on qc and K are examined. The best fit regression equations have been proposed to relate qc and K of untreated clay soil and stabilized clay using GS and CLS. The proposed nonlinear regression equations provide details of experimental data and aid in estimating qc and K very efficiently and reliably for targeted geotechnical applications from a sustainable perspective.

Keywords

• clay
• calcium lignosulphonate
• granite sand
• hydraulic conductivity
• unconfined compressive strength