Atterberg Limits testing is a group of tests used to define the properties of cohesive soils at different moisture contents. Gilson carries all the equipment needed to perform liquid limit, plastic limit and shrinkage limit tests in accordance with ASTM D4318 and ASTM D4943 standards, and other associated test methods.
Liquid Limit is the water content at which soil changes from a plastic to a liquid state as determined by testing in a Liquid Limit machine. Plastic Limit is the water content when a soil can no longer be rolled into 1/8in (3.2mm) diameter threads without crumbling. Plastic Limit is subtracted from Liquid Limit to establish the Plasticity Index, (PI) an important value when classifying soil types. Shrinkage limit is the water content where further loss of moisture does not cause a decrease in volume of a specimen.
For more in-depth information on Plastic Limit, Liquid Limit and Shrinkage Limit, refer to: Atterberg Limits: A Quick Reference Guide.