Investigations on time-dependent characteristics of black cotton soil

Abstract

Clayey soil is one of the widely available geomaterials which exhibits long-term time-dependent stress-strain behaviour. Examining time dependent behaviour is very important for geotechnical engineers and other infrastructural development professionals. This study primarily attempts to investigate the time-dependent stress-strain characteristics, including the creep and swelling behaviour. Creep can be defined as the viscous deformation of soil under the application of constant effective stress. While, swelling is the reverse action of creep, which is defined as the viscous expansion of saturated expansive soil during the removal of applied effective stress. Several models have been developed based on isochrone, isotache, rheological, microstructure, and EOP concepts to assess the time dependent stress-strain behaviour of soil. Elasto Viscoplastic Model considering Swelling (EVPS Model) based on the concept of delayed compression stated is employed to investigate several compressibility behaviours of Indian Black Cotton (BC) soil in this study.