Atterberg Limits Test: 10 Things (2025) You Must Know

#DYK The Atterberg limits tests consist of two main steps, each corresponding to a different physical condition of soil: Liquid Limit Test (LL): This determines the moisture content at which soil changes from a plastic to a semi-liquid state. It involves repeatedly dropping a cup containing the soil sample from a fixed height and measuring the moisture content at which the soil flows to close a groove of a standard width. Plastic Limit Test (PL): This finds the moisture content at which soil cha