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The California Bearing Ratio (CBR) is a measure of the strength of the subgrade of a road or other paved area, and of the materials used in its construction. The ratio is measured using a standardized penetration test first developed by the California Division of Highways for highway engineering.
California bearing ratios of field tests represent in-situ strengths of the material under existing field conditions and will not typically correlate with laboratory CBR values of the same material. Saturation levels are near 100% for soaked laboratory samples.
Learn how to perform and interpret the CBR test for evaluating the strength and stability of soil subgrade and pavement materials. Find the CBR value, design curves, and pavement thickness formula for different traffic and wheel loads.
The California Bearing Ratio(CBR) test is a measure of resistance of a material to penetration of standard plunger under controlled density and moisture conditions. It was developed by the California Division of Highways as a method of classifying and evaluating ...
The California Bearing Ratio (CBR) test is a simple strength test that compares the bearing capacity of a material with that of a well-graded crushed stone (thus, a high quality crushed stone material should have a CBR @ 100%).
Feb 12, 2024 · Learn how to perform the CBR test to evaluate the mechanical strength and load-bearing capacity of soil for road construction and other infrastructure projects. Find out the definition, apparatus, procedure, and applications of CBR in civil engineering.
Apr 16, 2017 · The California Bearing Ratio Test (CBR Test) is a penetration test developed by California State Highway Department (U.S.A.) for evaluating the bearing capacity of subgrade soil for design of flexible pavement.
