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California Bearing Ratio (CBR) Testing Equipment

California Bearing Ratio (CBR) Testing Equipment

California Bearing Ratio (CBR) Testing Equipment

Categories: Soil Mechanics Testing Lab

Specification 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 quali...
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Specification 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%).  It is primarily intended for, but not limited to, evaluating the strength of cohesive materials having maximum particle sizes less than 19 mm (0.75 in.) The basic CBR test involves applying load to a small penetration piston at a rate of 1.3 mm (0.05") per minute and recording the total load at penetrations ranging from 0.64 mm (0.025 in.) up to 7.62 mm (0.300 in.).  Figure Below is a sketch of a typical CBR sample.