Expansive and collapsible soil behaviour under the Revised Soil Classification System

Identifying expansive and collapsible soils is crucial for geotechnical engineering. Grain size distribution and Atterberg limits help identify such soils, and the Revised Soil Classification System enhances this identification. It primarily introduces a new testing protocol for the liquid limit of soils using various fluids. When assessing the plasticity behaviour of these soils under different levels of chemical stabilization, it is evident that the concentration of the stabilizing agent linearly reduces expansion or collapse potential. However, the liquid limit’s behaviour under varying pore fluid chemistry and stabilizing agent concentration follows a non-linear trend.