What does the term 'plasticity' refer to in soil analysis?

The term 'plasticity' in soil analysis refers specifically to the degree to which soil can be deformed without breaking. This characteristic is crucial when assessing soil behavior under various conditions, particularly in engineering and construction contexts. Soils with high plasticity can be easily molded or shaped and can exhibit significant changes in their volume and consistency when wet or dry. This is particularly important when evaluating soils for potential use in onsite wastewater systems, as the plasticity can influence factors such as drainage capability, compaction, and stability, all of which affect the overall performance of the soil in managing wastewater. Understanding plasticity helps engineers and planners anticipate how soil will react to construction activities, water infiltration, and other environmental factors.