1. What is a Liquid Limit Calculator?

Definition: This calculator determines the liquid limit (LL) of soil, which is the water content at which soil transitions from plastic to liquid state.

Purpose: It's used in geotechnical engineering and medical soil analysis to classify soils and understand their behavior under different moisture conditions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( LL \) — Liquid limit (dimensionless)
• \( w \) — Water content (%)
• \( N \) — Number of blows (dimensionless)

Explanation: The water content is multiplied by the number of blows required to close a standard groove in the soil sample, then divided by 25.

3. Importance of Liquid Limit Calculation

Details: The liquid limit helps determine soil classification, predict settlement, and assess foundation stability. It's crucial for construction and medical soil analysis.

4. Using the Calculator

Tips: Enter the water content percentage and number of blows from the Casagrande test. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical liquid limit range?
A: LL < 35% = low plasticity, 35-50% = medium, >50% = high plasticity.

Q2: How is the water content measured?
A: By comparing the weight of wet and oven-dried soil samples.

Q3: What does the number of blows represent?
A: The drops needed to close a 13mm groove in the soil sample.

Q4: Why divide by 25 in the formula?
A: This is an empirical factor that standardizes the test results.

Q5: How accurate is this calculation?
A: It provides a good estimate but lab testing gives more precise results.