Digital CBR Test Machine
STANDART: EN 13286-47, BS 1377:4, ASTM D1883
LT-S0150 Digital CBR Test Machine | 50kN
LT-S0150/1 CBR Penetration Piston
LT-G8035 Load Cell | 50 kN
LT-G8040 Displacement Sensor | 25×0,01mm
The Digital CBR Test Machine is designed to determine the California Bearing Ratio (CBR) of laboratory-compacted soil, subgrade, sub-base and road construction materials. The two-column loading frame has a maximum capacity of 50 kN and uses electronic load and displacement measurement for controlled penetration testing.
- 50 kN loading capacity: Robust two-column loading frame supports laboratory CBR testing.
- Digital load measurement: 50 kN load cell measures the force applied to the specimen.
- Displacement measurement: 25 mm capacity, 0.01 mm resolution displacement sensor monitors piston penetration.
- CBR penetration piston: LT-S0150/1 is supplied for standard penetration testing.
- Digital control unit: Displays load and displacement values during the test.
- 7″ TFT touch screen: Liya Test’s English product page specifies a touch-screen control interface.
- Motorized loading system: Electric motor drives the penetration piston into the specimen.
- Upper and lower limit switches: Automatically stop the machine at its travel limits.
- External dimensions: 52 × 65 × 116 cm.
- Approximate weight: 100 kg.
- Power supply: 220–240 V, 50–60 Hz, single phase.
- Product code: LT-S0150.
| Product Code | Product Name | External Dimensions (cm) | Weight (kg) | Power Supply |
| LT-S0150 | Digital CBR Test Machine | 52 × 65 × 116 | 100 | 220–240 V, 50–60 Hz, 1 ph |
What Is a Digital CBR Test Machine?
The Digital CBR Test Machine is used to determine the California Bearing Ratio of compacted soil and road construction materials under laboratory conditions.
CBR testing provides an empirical indication of the bearing characteristics of materials used in subgrade, sub-base and pavement construction. During the test, a standard penetration piston is driven into the prepared specimen while the applied force and corresponding penetration are measured.
The LT-S0150 uses a rigid two-column loading frame with a maximum capacity of 50 kN. Electronic sensors allow load and displacement values to be monitored digitally throughout the test.
50 kN Digital Load Measurement
The machine is equipped with an LT-G8035 load cell with a capacity of 50 kN.
As the penetration piston moves into the specimen, the load cell continuously measures the applied force. The measured value is transferred to the digital control unit, allowing the operator to monitor the loading behaviour during the test.
Electronic load measurement eliminates the need to read the test force from a conventional mechanical load ring.
25 mm Displacement Measurement
Penetration is monitored using the LT-G8040 displacement sensor.
Liya Test lists this sensor as 25 × 0.01 mm, corresponding to a 25 mm measurement range with 0.01 mm resolution.
The combination of electronic load and displacement measurement allows the system to follow the force-penetration relationship required for CBR evaluation.
Digital Touch Screen Control
The English Liya Test product description specifies a 7″ TFT touch-screen digital control unit.
Load and deformation measurements are displayed directly on the control system while the test is running. This provides the operator with a convenient way to monitor specimen response without relying on separate analogue indicators.
The loading piston is driven by an electric motor, providing controlled movement during laboratory testing.
Automatic Travel Limit Protection
The loading frame incorporates upper and lower limit switches.
When the piston reaches either travel limit, the system automatically stops the motor. This prevents unnecessary movement beyond the usable working range and helps protect the loading mechanism.
The LT-S0150 operates from a 220–240 V, 50–60 Hz, single-phase electrical supply.
ASTM D1883-21 CBR Testing
The current ASTM D1883-21 is active and covers determination of the California Bearing Ratio of laboratory-compacted soils. ASTM identifies the test as applicable to materials used in pavement components such as subgrades, subbases and bases.
The test evaluates the resistance of the prepared specimen to penetration and compares the measured load response with standardized reference values.
For this reason, accurate measurement of both penetration and applied load is fundamental to the CBR test.
BS EN 13286-47:2021
The current British/European reference is BS EN 13286-47:2021.
This standard specifies laboratory methods for determining the California Bearing Ratio, Immediate Bearing Index and linear swelling of unbound and hydraulically bound mixtures. BSI lists the 2021 edition as current.
The former BS 1377-4:1990 also included CBR testing, but BSI officially withdrew that standard on 29 March 2022.
Laboratory CBR Testing Solution
The LT-S0150 measures 52 × 65 × 116 cm and weighs approximately 100 kg.
Its 50 kN loading system, electronic load cell, digital displacement sensor and touch-screen control unit provide a compact laboratory solution for CBR testing of compacted soil and road construction materials.
Overall, the Digital CBR Test Machine combines motorized loading with digital measurement to support controlled and repeatable California Bearing Ratio testing.
