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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 . [ 1 ]
The MEXE probe, also known as the Soil Assessment Cone Penetrometer or MEXE Cone Penetrometer, is a piece of equipment developed by MEXE to estimate the California bearing ratio (CBR) of a subgrade (soil) in the field. [12] It is a pointed cone attached to a spring-loaded handle by extension spindles.
The shrinkage limit is also a part of the Atterberg limits. The results of this test can be used to help predict other engineering properties. [7] California bearing ratio ASTM D 1883. A test to determine the aptitude of a soil or aggregate sample as a road subgrade. A plunger is pushed into a compacted sample, and its resistance is measured.
In this report the CBR-method (California Bearing Ratio) is primarily referred to. The so-called CBR-value represents the ratio of the percentage of the loads required to press a punch of certain dimensions first into a well compacted sample of soil and then into a standard sample of compacted gravels, to a depth of 0.1 inch.
The California Bearing Ratio (CBR) test is commonly used to determine the suitability of a soil as a subgrade for design and construction. The field Plate Load Test is commonly used to predict the deformations and failure characteristics of the soil/subgrade and modulus of subgrade reaction (ks).
California bearing ratio, a strength measurement of material under a paved area; Cannabinoid receptor, a type of cell membrane receptor; Carbonyl reductase genes: CBR1 and CBR3; Case-based reasoning, an artificial intelligence technique; Central benzodiazepine receptor, the receptor for benzodiazepines in the central nervous system
The R-Value test [1] measures the response of a compacted sample of soil or aggregate to a vertically applied pressure under specific conditions. This test is used by Caltrans for pavement design, replacing the California bearing ratio test. Many other agencies have adopted the California pavement design method, and specify R-Value testing for ...
Ultralow strength: characterized by K = 20 MN/m^3 and representing all K values below 25 MN/m^3 for rigid pavements, and by CBR = 3 and representing all CBR values below 4 for flexible pavements D: Maximum allowable tire pressure: Unlimited: no pressure limit W: High: limited to 1.75 MPa X: Medium: limited to 1.25 MPa Y: Low: limited to 0.50 MPa Z