The California Bearing Ratio (CBR) is a degree of the strength of the subgrade of a road or other paved area,
and of the materials used in its construction. The CBR is the ratio of the bearing load that penetrates a material
to a specific depth compared with the load giving the same penetration into crushed stone. Penetration is
measured by applying the bearing load on the sample using a standard plunger of diameter 50 mm at the rate of
1.25 mm/min. The CBR is expressed as a percentage of the actual load causing the penetrations of 2.5 mm or 5.0 mm
to the standard loads on crushed stone. A load penetration curve is drawn. The load values on standard crushed
stones are 1,370 kgf (13.44 kN) and 2,055 kgf (20.15 kN) at 2.5 mm and 5.0 mm penetrations respectively
With "CiviLab", you can easily do the calculations for this test, plot the various curves and correctly archive them. CiviLab also provides high quality reports.
CiviLab is a civil engineering laboratory software (Soil and concrete). Our laboratory software allows you to perform the tests with your preferred language and provides you a multilingual reports. Designed by civil engineers to meet your expectations. Easiness of usage, allowing members of your laboratory to master CiviLab in record time.
Our soil and concrete laboratory software supports the following languages
CiviLab supports the following unit systems: