The ‘California Bearing Ratio’ (CBR) is a Penetration Test performed to evaluate the Mechanical Strength of Natural Ground, as well as on Subgrades and Base Courses beneath new Carriageway Constructions and also Flexible Pavements..
The ‘CBR-Rating’ was developed for the purpose of measuring the ‘Load-Bearing Capacity’ of soils, used for building roads.
The CBR can also be used for measuring the Load-Bearing Capacity of unimproved airstrips or for soils, under paved airstrips.