POCKET VANE SHEAR APPARATUS AZA0921

Description

Applications

The AZA0921 Pocket Vane Shear Apparatus is widely used for:

• Field testing of soft to stiff cohesive soils (clays)

• Shallow depth shear strength evaluation

• Construction site quality control and stability checks

• Preliminary geotechnical investigations

• Academic and research-based comparative field studies

Key Benefits

• Rapid in-situ determination of undrained shear strength

• No electricity, batteries, or laboratory setup required

• Compact and lightweight—easy to carry in a field kit

• Interchangeable vanes for varying soil consistencies

• Ideal for time-sensitive and remote site investigations

Operating Principle

The apparatus operates on the field vane shear test principle. A vane of known geometry is inserted into the soil and rotated using the built-in torque head. The soil’s resistance to rotation is measured as torque, which is directly related to its undrained shear strength.

Shear strength is determined using the measured torque value and vane dimensions, either directly from the calibrated scale or via the supplied conversion chart.

Construction & Features

• Torque Measuring Unit:
  Spring-loaded or dial-type torque gauge for precise measurement.

• Interchangeable Vanes:
  Standard vane sizes of 16 mm, 20 mm, and 25 mm diameter, allowing adaptability across soil strengths.

• Insertion Depth:
  Suitable for shallow testing, typically up to 150 mm.

• Material:
  Manufactured from corrosion-resistant metal alloy for durability in field conditions.

• Carrying Case:
  Supplied with a sturdy protective case featuring foam-cut compartments for safe transport and storage.

Standards Compliance

• ASTM D2573 – Standard Test Method for Field Vane Shear Test in Cohesive Soil

This ensures that test results are consistent with internationally recognized field testing practices.

Specifications

Frequently Asked Questions (FAQ)

Q1: What soil types can be tested using AZA0921?
A: It is best suited for soft to stiff cohesive soils, particularly clays. It is not recommended for sandy or granular soils.

Q2: Is the apparatus factory calibrated?
A: Yes. AZA0921 is factory calibrated and supplied with a torque-to-shear-strength conversion chart.

Q3: Can it be used in saturated soil conditions?
A: Yes. It performs well in moist and saturated cohesive soils. Excessive water content should be noted during interpretation.

Q4: Does it require power or batteries?
A: No. It is a fully mechanical instrument, ideal for use in remote or off-grid locations.

Q5: Which standard does it comply with?
A: The apparatus complies with ASTM D2573 for field vane shear testing.