Undrained cyclic loading response of lignosulfonate treated high plastic clay. Issue 150 (November 2021)

• Record Type: Journal Article
• Authors: Singh, Avinash Kumar; Sahoo, Jagdish Prasad
• Is Part Of: Soil dynamics and earthquake engineering. Issue 150(2021)
• Publication Date: 2021-11
• Subjects: Lignosulfonate -- UCS -- Resilient modulus -- Permanent strains; Soil dynamics -- Periodicals; Earthquake engineering -- Periodicals; Sols -- Dynamique -- Périodiques; Génie parasismique -- Périodiques; 624.176205
• DOI: 10.1016/j.soildyn.2021.106943
• Languages: English
• ISSNs: 0267-7261

Abstract

Abstract: In this study, a non-traditional and environment friendly chemical stabilizer, lignosulfonate has been used to stabilize high plastic clay and its effectiveness has been investigated through a series of static and cyclic loading tests. Unconfined compression tests were conducted for various percentages of lignosulphonate contents (0.5, 0.75, 1.5, 2.0, 2.5 and 3.0%) by weight of dry soil at curing periods of 5, 10 and 21 days. Shear strength and deformation characteristics of stabilized specimens were examined, corresponding to optimum content of lignosulfonate at which unconfined compressive strength was maximum, for different confining pressures and cyclic stress levels under unconsolidated undrained conditions. Test results indicated a significant increase in unconfined compressive strength and shear strength under static loading; whereas, reduction in axial strains and rate of permanent strain development, and increased resilient modulus under cyclic loading. In addition, SEM analysis has also been conducted to understand the microstructural changes occurring in the soil due to addition of lignosulfonate. Highlights: Effectiveness of lignosulfonate stabilized high plastic clay under undrained loading conditions. Optimum content of lignosulfonate corresponding to maximum value of unconfined compressive strength. Strength and deformation characteristics of stabilized clay from static and cyclic loading tests. Microstructural changes in the soil due to addition of lignosulfonate through SEM analyis.