The California Bearing Ratio (CBR) test is used to discover the strength of subgrade soil for constructions like roadways, pavements, and curves. The test is named after the California Division of Highways who first developed the testing method. The penetration test aims to classify and evaluate the different course materials as well as subgrades of soil for the making of more flexible pavements that can withstand the test of time better while also being more convenient towards usage.
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