Portable CBR Test Machine for Field Soil Testing

The Portable CBR Test Machine is designed to determine the California Bearing Ratio (CBR) of soil directly in the field or laboratory. It is widely used to evaluate the bearing capacity of subgrade soils for pavement design, road construction, foundation engineering, and geotechnical investigations.

The machine features a robust 50 kN loading frame, an adjustable CBR penetration piston, and precision dial gauges for accurate load and penetration measurements. Its lightweight, portable design enables engineers to perform reliable CBR testing efficiently at construction sites, highways, and remote project locations while maintaining laboratory-quality accuracy.

Key Features

• Designed for portable CBR testing
• Suitable for field and laboratory applications
• 50 kN loading capacity
• Adjustable CBR penetration piston
• Precision load measurement
• Adjustable dial gauge holder
• Easy to transport and operate
• Robust steel construction
• Accurate penetration measurement
• Reliable field performance
• Durable laboratory-quality components
• Ideal for geotechnical investigations

Standards

• ASTM D4429
• BS 1377-7
• NF P94-078

Technical Specifications

Included Components

The Portable CBR Test Machine includes:

• 50 kN loading frame
• Adjustable CBR penetration piston
• Adjustable dial gauge holder
• 25 mm × 0.01 mm dial gauge
• 0–3 mm penetration dial gauge
• 9 kg slotted surcharge weight
• Two 4.5 kg slotted surcharge weights

Note: The standard supply includes the machine frame only. Additional accessories are available separately depending on the selected configuration.

Available Models

Portable CBR Test Method

The Portable CBR Test Machine measures the bearing capacity of soil by applying a controlled penetration load through a standardized CBR piston.

During the test, the applied load and penetration depth are recorded simultaneously to calculate the California Bearing Ratio (CBR). The resulting data are used to assess subgrade strength for pavement design, road construction, and foundation engineering.

Field-Ready Construction

The BESMAK Portable CBR Test Machine is engineered to withstand demanding field conditions while delivering reliable and repeatable testing performance.

Its rugged steel frame, portable design, and precision measuring instruments enable accurate CBR testing at construction sites, highway projects, and geotechnical investigations without compromising laboratory-level measurement quality.

Applications

The Portable CBR Test Machine is suitable for:

• Field CBR testing
• California Bearing Ratio (CBR) testing
• Soil bearing capacity evaluation
• Pavement design
• Highway engineering
• Geotechnical investigations
• Road construction projects
• Construction materials laboratories
• Research and development laboratories

Why Choose the BESMAK Portable CBR Test Machine?

The BESMAK Portable CBR Test Machine combines portability, robust construction, and precise measurement technology to deliver accurate field evaluations of soil bearing capacity.

Its durable design, reliable measuring components, and ease of transportation make it an ideal solution for geotechnical engineers, highway authorities, construction companies, and research laboratories requiring dependable CBR testing in both field and laboratory environments.

Frequently Asked Questions

What is a Portable CBR Test Machine?

A Portable CBR Test Machine is field testing equipment used to determine the California Bearing Ratio (CBR) of soil for pavement design, foundation engineering, and geotechnical investigations.

What is the load capacity of the machine?

The machine has a 50 kN loading capacity, making it suitable for standard field and laboratory CBR testing.

Which standards does the Portable CBR Test Machine comply with?

The Portable CBR Test Machine complies with the following international standards:

• ASTM D4429
• BS 1377-7
• NF P94-078

Is the machine suitable for field testing?

Yes. The machine is specifically designed for portable field CBR testing and geotechnical site investigations, offering reliable performance under demanding site conditions.

What measuring devices are included?

The machine includes:

• 25 mm × 0.01 mm dial gauge
• 0–3 mm penetration dial gauge

Where is the Portable CBR Test Machine commonly used?

The Portable CBR Test Machine is widely used by highway authorities, geotechnical engineers, construction companies, universities, research institutes, and construction materials testing laboratories for in-situ soil bearing capacity evaluation and pavement design.