Liquid Limit Test:
Liquid Limit Test: The liquid limit (LL) is the exact moisture content (the percentage of water) at which a fine-grained soil changes from a plastic state to a liquid state. In simpler words, it is the boundary line where a soil goes from acting like moldable clay to acting like thick, runny mud. 4 Main Reasons Why We Test the Liquid Limit To Predict Soil Failure (Landslides and Settling): If a heavy structure is built on soil that gets close to its Liquid Limit, the soil will lose its strength and start to flow. This causes foundations to sink, walls to crack, and slopes to slide. To Identify "Expansive" Clays: Some soils act like sponges. A high Liquid Limit (usually above 50%) means the soil contains clay that expands heavily when wet and shrinks when dry. This constant movement can break concrete slabs and roads. To Classify the Soil Correctly: Engineers cannot just guess what kind of soil they are worki...