California Bearing Ratio (CBR) test is a compressive nature penetration test. It was originally developed by Caltrans i.e. California Department of Transportation after World War II i.e. in the late 1930s.  The test is specifically used to determine the mechanical ...

American Association of State Highway and Transportation Officials (AASHTO) has devised a Soil Classification system; so you can find here how to classify soil according to AASHTO classification system.  Soil although has many definition but for civil engineers it is ...