California Bearing Ratio Testing Machine (CBR)

STANDARDS: EN 13286-47 | ASTM D1883 | AASHTO T193 | CNR UNI 10009 | NF P94-078 | BS 1377:2

California Bearing Ratio Testing Machine (CBR) is a laboratory testing system designed to determine the California Bearing Ratio (CBR) of compacted soil and granular materials. The CBR test is widely used to evaluate the load-bearing capacity of subgrade, sub-base and base materials for road and pavement construction.

Used to load the penetration piston into the soil sample at a constant rate of 1.27 mm/min, and to measure the applied loads and piston’s penetrations at determined intervals.
Matest proposes a wide range of machines: hand operated, motorized, dual speed, universal multispeed; load measurement by load ring, or by electric load cell and digital unit with X/Y graphic recorder of load/penetration through RS 232 port to PC.

It can therefore perform:
- Unconfined test with rate of 0.635 mm/min.
- CBR test with rate of 1.27 and 1 mm/min.
- Marshall test with rate of 50.8 mm/min.
- Splitting tensile test on Marshall specimens.
- Quick Triaxial (with trixial cell and suitable accessories)
The speed rate is infinitely variable, easily and promptly selected.
Display LCD TFT, 800x480 pixel, 7’’, touch-screen.
Time/date and language selection (English, French, German, Spanish, Italian, Polish).
Foreseen of electric end of stroke switch of the load plate to save the machine from wrong manipulations.
Upper beam can be adjusted in height.
Supplied without load ring and accessories which have to be ordered separately.

The machine provides controlled penetration of a standard piston into the prepared soil specimen and enables accurate measurement of the resistance developed during the test.

Key Features:

• Designed for California Bearing Ratio (CBR) testing
• Suitable for compacted soil and granular materials
• Controlled penetration testing
• Accurate load measurement
• Robust and durable laboratory construction
• Suitable for routine and quality-control testing
• Ideal for highway and pavement engineering laboratories
• Suitable for geotechnical and civil engineering applications
• Manufactured in Italy

Applications:

• California Bearing Ratio (CBR) testing
• Road and pavement subgrade evaluation
• Soil bearing capacity assessment
• Highway engineering
• Geotechnical soil testing
• Construction material quality control
• Sub-base and base material testing
• Civil engineering laboratories
• Research and educational laboratories