The California bearing ratio (CBR) testing is an evaluation of the strength of a ground, base courses, and substrates. The measure was invented by the California Department of Transport has been a vital part of construction, especially the construction of roads and airstrips. A site test is done to establish the amount of pressure it would take to penetrate aggregate or soil using a standard plunder. This pressure value is then divided by pressure necessary to get equal penetration for the pressure to go through standard crushed rocks.
When CBR testing was developed, the objective was to help in the measurement of load bearing capacity of materials like soil that were used in the construction of roads. It could also be useful in estimating the loa ...
