Automatic CBR Test Apparatus
Product Code : EL-STLE-10377
Automatic CBR Test Apparatus (code EL-STLE-10377) is a 50 kN electro-mechanical machine for laboratory determination of the CBR value of highway subbases and sub-grade, and of the strength of cohesive materials with maximum particle sizes less than 19 mm (3/4 in). A two column frame with adjustable upper crossbeam drives the penetration piston at a constant rate set between 0.5 and 5 mm/min, and the data system calculates the corrected CBR at 2.5 and 5 mm and stores up to 10000 results.
Get a quote: use the Add To Cart enquiry button below, or send your quantity and delivery location through the contact page.
Specifications
| Parameter | Detail |
|---|---|
| Use | Laboratory evaluation of the CBR value of highway subbases and sub-grade; strength of cohesive materials with maximum particle size less than 19 mm (3/4 in) |
| Frame | Two column frame with adjustable upper crossbeam |
| Drive | Electro-mechanical ram, maximum capacity 50 kN |
| Ram speed | Set between 0.5 mm/min and 5 mm/min from the digital readout unit |
| Test methods | Tests to BS, EN, ASTM or AASHTO standards can be run on the same machine |
| Platen adjustment | Rapid adjustment by up and down buttons on the front panel |
| Power | 370 W |
| Dimensions | 480 × 650 × 1150 mm |
| Weight | Approx. 110 kg |
| Supplied with | |
| Load cell | 50 kN |
| Penetration piston | Included |
| Displacement transducer | Linear potentiometric, 25 × 0.001 mm, with connection part |
| Software and cable | Computer software, connection cable and advanced report generation |
| PC | Optional |
| Data acquisition and control | |
| CBR calculation | Corrected CBR value at 2.5 and 5 mm; % CBR at 2.5 mm and at 5 mm calculated and saved automatically |
| Load readings | Load saved at user defined displacements such as 0.625, 1.25, 1.875, 2.5, 3.75, 5, 7.5, 10 and 12.5 mm |
| Corrected loads | Loads at the set displacements, corrected with respect to the linear region of the data, also saved |
| Control modes | Displacement control and limited load control |
| Graph | Real time display of the test graph |
| Processor | CPU card with 32-bit ARM RISC architecture |
| Data storage | Permanent storage for up to 10000 test results |
| Analogue channels | 4, of which 2 are active for CBR |
| Resolution | 1/256000 points per channel |
| Sample rate | 10 data per second for each channel |
| Keys | 4 main function keys |
| Language | Multi-language support |
| Units | kN, ton and lb |
| Clock | Real-time clock and date |
| Display | 800 × 480 resolution, 65535 colour TFT-LCD industrial touchscreen |
| Interface | Test result visualisation and memory management interface |
| Connection | Ethernet for computer interface and remote connection |
| USB | USB flash disc for importing test results and for firmware |
| Printer | USB printer support for inkjet and laser printers |
| Camera | Camera support for real-time video recording during the test |
| PC software | Free of charge PC software for test control and advanced report generation |
| Standards | EN 13286-47; BS 1377:4; ASTM D1883; AASHTO T193; NF P94-078; UNI CNR 10009 |
| Supply | |
| Product code | EL-STLE-10377 |
| Manufacturer | Engineering Lab Equipment, Ambala, Haryana, India |
What Is the Automatic CBR Test Apparatus Used For?
The California Bearing Ratio test compares the load needed to push a standard piston into a compacted soil specimen with the load needed for a standard crushed stone, and the ratio is used in the thickness design of road pavements. The compacted specimen, in its mould, is placed on the platen; the operator brings it up to the piston with the front panel buttons, sets the rate and starts the test. The machine records load against penetration from the 50 kN load cell and displacement transducer, draws the curve in real time and reports the corrected CBR at 2.5 and 5 mm. The standards listed are EN 13286-47, BS 1377:4, ASTM D1883, AASHTO T193, NF P94-078 and UNI CNR 10009.
What to Specify When Ordering
- Quantity — the number of CBR machines required.
- PC — whether the optional PC is to be supplied with the machine.
Frequently Asked Questions
What penetration rates can be set?
The ram speed is set from the digital readout unit anywhere between 0.5 mm/min and 5 mm/min, so one machine can run the rates called for by different test methods.
Does the machine calculate the CBR value itself?
Yes. It calculates the corrected CBR value at 2.5 mm and 5 mm penetration, saves the loads at user defined displacements and stores the % CBR results automatically.
How many results can be stored, and how are they transferred?
Permanent storage holds up to 10000 test results. Results can be copied to a USB flash disc, sent to a computer over Ethernet, which also allows remote connection, or printed on a USB inkjet or laser printer.
What is supplied with the machine?
It comes with a 50 kN load cell, a penetration piston, a 25 × 0.001 mm linear potentiometric displacement transducer with connection part, computer software, connection cable and advanced report generation. A PC is optional.
What are the power rating, size and weight?
The machine is rated at 370 W, measures 480 × 650 × 1150 mm and weighs approximately 110 kg.
Which standards does the CBR machine list?
The standards listed are EN 13286-47, BS 1377:4, ASTM D1883, AASHTO T193, NF P94-078 and UNI CNR 10009.
OEM Manufacturer
The Automatic CBR Test Apparatus is made by Engineering Lab Equipment (Engineering Labs Equipment Pvt Ltd) at its works at Plot No. 43, Industrial Park, Sector 2, Growth Center, Saha, District Ambala, Haryana, India. The company designs, makes and tests soil testing equipment for classification, compaction, density, shear and consolidation tests for engineering colleges, polytechnics, technical training institutes and research laboratories in India and overseas, and can build equipment to an institution's own requirements. Tender and OEM enquiries are handled through the Tenders/OEM page.
Related Soil Testing Equipment
- Field CBR Test Set — dual purpose CBR assembly for in-situ tests on a vehicle bracket or as a hand machine.
- DCP – Dynamic Cone Penetrometer — portable 60° cone penetrometer for in-situ pavement testing to 800 mm or 1,200 mm.
- Load Ring Penetrometer — hand cone penetrometer with 1 kN load ring and 30° cone for soil bearing and compaction checks.
- Standard Penetration Test — split-spoon penetration test set with 35 mm i.d. sampler, three-leg 5 metre frame and pulley.
See the full Soil Testing Lab Equipment range or all Civil Engineering Lab Equipment.
Request a Quote
For this and other soil testing lab equipment, schools and colleges can contact Engineering Lab Equipment, a manufacturer, supplier and exporter based in Ambala, India. To ask for a quotation, send the number of machines and whether the optional PC is needed and your delivery location through the contact page, or use the Add To Cart enquiry button on this page.
Last updated: October 2026
.jpg)