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The CBR test is a penetration test in which a standard piston, with a diameter of 50 mm (1.969 in), is used to penetrate the soil at a standard rate of 1.25 mm/minute. Although the force increases with the depth of penetration, in most cases, it does not increase as quickly as it does for the standard crushed rock, so the ratio decreases.
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.
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
Gravel (largest fragment in this photo is about 40 mm (1.6 in)) Gravel (/ ˈ ɡ r æ v əl /) is a loose aggregation of rock fragments.Gravel occurs naturally on Earth as a result of sedimentary and erosive geological processes; it is also produced in large quantities commercially as crushed stone.
A sieve analysis (or gradation test) is a practice or procedure used in geology, civil engineering, [1] and chemical engineering [2] to assess the particle size distribution (also called gradation) of a granular material by allowing the material to pass through a series of sieves of progressively smaller mesh size and weighing the amount of material that is stopped by each sieve as a fraction ...
Founded in December 2017 on the site of the Willow Run manufacturing complex, [4] the American Center for Mobility began as a joint initiative of the State of Michigan, partnering with Ann Arbor SPARK, Business Leaders for Michigan, the Michigan Department of Transportation, the Michigan Economic Development Corporation, the University of Michigan, and Ypsilanti Township as a way of ...
Symbol used in drawings Diagram showing the rod and vane inserted into the soil US Army Corps of Engineers personnel carrying out a shear vane test. The shear vane test is a method of measuring the undrained shear strength of a cohesive soil. The test is carried out with equipment consisting of a rod with vanes mounted to it that is inserted ...
The Environmental Research Institute of Michigan (ERIM) began as Willow Run Laboratories in 1946, but was established as a private not for profit research institute when it formally separated from the University of Michigan in 1972. [1] ERIM contributed to the development of remote sensing for environmental and military applications.