Casagrande Liquid Limit Apparatus

Casagrande Liquid Limit Apparatus – Soil Consistency Determination

The Casagrande Liquid Limit Apparatus is a precision-engineered device used to determine the moisture content at which cohesive soils transition from a plastic to a liquid state. Essential in geotechnical testing and soil classification, it forms a part of the Atterberg Limits suite used to assess soil behavior and consistency under varying moisture conditions. This apparatus includes an AASHTO-compliant grooving tool and is compatible with both ASTM and AASHTO standards.

Key Features of Casagrande Liquid Limit Apparatus

• Compliant with Standards: Conforms to ASTM D4318 and AASHTO T89 for consistent test procedures.

• Durable Construction: Brass or anodized aluminum cup with precision cam-actuated carriage.

• Precision Grooving Tool: Includes both Casagrande and AASHTO grooving tools to match testing specifications.

• Adjustable Drop Mechanism: 10 mm drop height with calibrated cam for repeatable cup motion.

• Mechanical or Digital Counter: Accurately counts blows to close the groove in the soil sample.

• Rigid Base Plate: Ensures stability and features engraved scale for consistent setup.

• Corrosion-Resistant Finish: Designed for long-lasting use in laboratory environments.

Applications

• Soil Classification: Determines the Liquid Limit (LL) for fine-grained soils under Unified and AASHTO systems.

• Atterberg Limits Testing: One of the primary tools for plastic and liquid limit assessments.

• Foundation and Structural Design: Assists engineers in evaluating settlement potential and soil behavior under load.

• Road and Pavement Engineering: Determines suitability of subgrade soils in highway construction.

• Geotechnical Site Investigations: Widely used by soil engineers for field and lab-based soil testing.

Included Accessories

• AASHTO Brass Grooving Tool – Code: 24-0461

• ASTM Plastic Grooving Tool – Code: 24-0451 (optional)

Standards Compliance

• ASTM D4318

• AASHTO T89