Soil Plasticity and Index Properties. Determines how a soil reacts to changes in moisture, indicating its potential to expand, shrink, or deform. These tests define characteristics such as liquid limit, plastic limit, and plasticity index — critical for foundation design and soil behavior assessment.

Compaction/Moisture-Density Relationship. Analyzes how soil density changes with varying moisture content to determine the optimal moisture level for maximum compaction. Essential for achieving stable, load-bearing subgrades in construction projects.

Soil Permeability. Measures how easily water can pass through soil, which is critical for drainage design, slope stability, and foundation planning — especially in flood-prone or water-sensitive areas.