CBR (California Bearing Ratio) Testing machine helps in determining California bearing ratio through conducting load penetration test under laboratory conditions. The California bearing ratio test is performed as penetration test that assists in evaluation of sub-grade strength of pavements and roads.
The results achieved through these tests are used in combination with empirical curves for determining thickness of pavement as well as its component layers. As a most widely used process for designing of flexible pavement, CBR test is most commonly used for designing thickness for highways and airfield pavement after evaluating strength of -
- Sub grade soil
- Sub base
- Base course material