AUTOMATIC CBR TEST APPARATUS AZA0913

Description

The Power of Automation in CBR Testing

Conventional manual CBR testing is limited by:

• Difficulty in maintaining a constant penetration rate of 1.25 mm/min

• Human error in manual load and penetration readings

• Time-consuming data plotting and calculations

The AZA0913 Automatic CBR Test Apparatus overcomes these limitations through:

• Precise Penetration Control
  Motorised loading frame ensures an exact and constant penetration rate as specified by IS, ASTM, and BS standards.

• Automated Data Acquisition
  High-accuracy load cells and displacement transducers continuously capture load and penetration data in real time.

• Software-Based Analysis
  Dedicated software automatically plots load–penetration curves, applies tangent corrections, calculates CBR values at 2.5 mm and 5.0 mm, and generates professional test reports.

• Superior Accuracy & Reproducibility
  Automated testing minimizes human intervention, ensuring highly consistent and repeatable results.

• Improved Laboratory Efficiency
  Technicians are free from manual recording, increasing throughput and reducing overall test time.

Working Principle of AZA0913 Automatic CBR Apparatus

1. Sample Preparation
   Soil is compacted or placed undisturbed in a standard CBR mould and positioned on the loading frame.

2. Sensor Configuration

   • A high-resolution load cell measures penetration resistance.

   • A linear displacement transducer (LVDT) measures penetration depth.

3. Automated Penetration
   The motorised frame advances the penetration piston at a constant 1.25 mm/min.

4. Real-Time Data Capture
   Load and penetration signals are continuously transmitted to the data acquisition system.

5. Software Processing & Reporting
   The Azalab software records data, displays live graphs, applies corrections, calculates CBR values, and generates detailed test reports.

Key Features of AZA0913

• High-Precision Motorised Loading Frame
  Heavy-duty construction with precision geared motor
  Constant penetration speed: 1.25 mm/min

• High-Resolution Load Cell
  Capacity options: 50 kN or 100 kN
  Accuracy typically better than ±0.5% of full scale

• Linear Displacement Transducer (LVDT)
  Range: 25 mm
  Resolution: up to 0.001 mm

• Advanced Data Acquisition System
  Multi-channel, high sampling rate data logger
  USB / Ethernet connectivity to PC

• User-Friendly Software Package

  • Real-time load–penetration graph

  • Automatic CBR calculation at 2.5 mm & 5.0 mm

  • Tangent correction for initial concavity

  • Data storage, export (Excel/PDF), and reporting

• Compatibility
  Works with standard IS/ASTM CBR moulds, surcharge weights, spacer disc, and accessories

• Safety Features
  Emergency stop button and overload protection

• Durable Construction
  Designed for continuous laboratory use with long-term stability

Applications

• Flexible pavement design for roads, highways, and airfields

• Quality control of subgrade, sub-base, and base materials

• Soil stabilization evaluation

• Geotechnical and academic research

• Infrastructure and earthwork projects

Standards Compliance

• IS 2720 (Part 16):1987 (Reaffirmed 2021)

• ASTM D1883

• BS 1377-4

Technical Specifications

Model: AZA0913
Product Type: Automatic California Bearing Ratio (CBR) Test Apparatus
Application: Laboratory determination of CBR values
Country of Origin: Made in India

Loading Frame

• Type: Motorised, bench-top / floor-standing

• Capacity: 50 kN or 100 kN

• Penetration Speed: 1.25 mm/min (constant)

• Motor: Precision geared motor

Load Measurement

• Sensor: High-resolution load cell

• Accuracy: ±0.5% FS or better

Displacement Measurement

• Sensor: LVDT / Potentiometer

• Range: 25 mm

• Resolution: 0.001 mm

Data Acquisition & Software

• Multi-channel DAQ system

• USB / Ethernet PC connectivity

• Windows-compatible software with real-time display and automated reporting

Power Supply

• 230V AC, 50/60 Hz, Single Phase

FAQ – AZA0913

Q: What is the main advantage of AZA0913 over manual or motorised CBR systems?
A: AZA0913 provides fully automated penetration, data acquisition, calculation, and reporting, eliminating human error and ensuring maximum accuracy and repeatability.

Q: What samples can be tested?
A: Both laboratory-compacted and undisturbed soil samples in standard CBR moulds.

Q: What data is automatically recorded?
A: Continuous load and penetration values throughout the test.

Q: Does the software apply corrections and calculations?
A: Yes, it automatically applies tangent corrections and calculates CBR values at 2.5 mm and 5.0 mm.

Q: Is the system user-friendly?
A: Yes, the interface is intuitive, with real-time graphs and automated report generation.