Automatic CBR Test Machine for California Bearing Ratio Testing

The Automatic CBR Test Machine is designed to determine the California Bearing Ratio (CBR) of soil specimens in accordance with internationally recognized testing standards. It is ideal for evaluating the load-bearing capacity of subgrade soils used in road construction, pavement design, and geotechnical engineering.

The machine features a robust 50 kN two-column load frame, an advanced 10-inch SEMATRON touchscreen controller, a high-precision load cell, and a servo electromechanical drive system that ensures accurate, stable, and repeatable testing. Its intelligent control system automatically manages loading speed, data acquisition, calculations, and report generation, making it an excellent solution for quality control and research laboratories.

Key Features

• Automatic California Bearing Ratio (CBR) testing
• 50 kN load capacity
• Heavy-duty two-column load frame
• 10-inch SEMATRON touchscreen controller
• Servo electromechanical drive system
• Precision load cell measurement
• High-accuracy 25 mm LVDT displacement sensor
• Closed-loop load control
• Automatic data acquisition
• Automatic test calculations
• Universal Testing Software included
• Real-time load and displacement monitoring
• User-friendly interface
• Automatic report generation
• Suitable for quality control and research laboratories

Standards

• ASTM D1883
• BS 1377-4

Technical Specifications

Frame

Load Measurement

• High-precision load cell
• Measuring range: 2%–100% of full scale
• Accuracy: Class 1 or better
• Compliant with EN ISO 7500-1

Displacement Measurement

Servo Drive System

• Precision stepper motor
• Closed-loop control
• Mechanical precision gearbox
• Stable and accurate loading speed

SEMATRON Control Unit

The Automatic CBR Test Machine is equipped with the advanced SEMATRON Series digital controller featuring a 10-inch industrial touchscreen display.

The controller provides:

• Adjustable loading speed
• Automatic data acquisition
• Continuous load and displacement monitoring
• Automatic sensor recognition
• Automatic calibration
• Automatic test report generation
• USB communication
• Multi-language interface

Its intelligent control system minimizes operator intervention while ensuring highly accurate and repeatable California Bearing Ratio testing.

Universal Testing Software

The machine is supplied with BESMAK Universal Testing Software, providing complete laboratory automation and comprehensive test management.

The software includes:

• Automatic CBR test execution
• Real-time graph display
• Automatic calculations
• Automatic report generation
• Database management
• Sensor configuration
• Customizable test procedures
• Data export

Available Models

Applications

The Automatic CBR Test Machine is widely used for:

• California Bearing Ratio (CBR) testing
• Soil bearing capacity evaluation
• Geotechnical laboratories
• Highway engineering laboratories
• Pavement design
• Road construction quality control
• Construction materials laboratories
• Universities and research institutions
• Research and development laboratories

Why Choose the BESMAK Automatic CBR Test Machine?

The BESMAK Automatic CBR Test Machine combines a precision-engineered load frame, the intelligent SEMATRON controller, and powerful Universal Testing Software to deliver reliable and repeatable California Bearing Ratio testing.

Its automated control system, accurate load and displacement measurement, and comprehensive reporting capabilities significantly reduce operator involvement while increasing laboratory efficiency. Designed for quality control, geotechnical investigations, and research applications, it provides dependable performance and long-term reliability.

Frequently Asked Questions

What is an Automatic CBR Test Machine?

An Automatic CBR Test Machine is laboratory equipment used to determine the California Bearing Ratio (CBR) of compacted soil specimens. The results are used to evaluate soil strength for pavement and foundation design.

What is the load capacity of the machine?

The standard model has a 50 kN load capacity, with additional models available for higher capacities.

Which controller is used?

The machine is equipped with the 10-inch SEMATRON touchscreen controller, providing automatic test control, data acquisition, and report generation.

What displacement sensor is installed?

The machine uses a 25 mm LVDT displacement sensor with a 0.01 mm resolution for highly accurate displacement measurement.

Which standards does the Automatic CBR Test Machine comply with?

The machine complies with the following international standards:

• ASTM D1883
• BS 1377-4

Is testing software included?

Yes. Every machine is supplied with BESMAK Universal Testing Software, which supports automatic testing, real-time monitoring, data management, and professional report generation.

Where is the Automatic CBR Test Machine commonly used?

The machine is widely used in geotechnical laboratories, highway authorities, road construction laboratories, universities, research institutes, and construction materials testing laboratories for routine quality control and research applications.