California bearing ratio


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California bearing ratio

A ratio used in determining the bearing capacity of a foundation; defined as the ratio of the force per unit area required to penetrate a soil mass with a 3 sq in. (19.4 sq cm) circular piston at the rate of 0.05 in. (1.27 mm) per min to the force required for corresponding penetration of a standard crushed-rock base material; usually determined at a penetration of 0.1 in. (2.54 mm).

California bearing ratio (CBR)

The bearing ratio of soil determined by comparing the penetration load of the soil to that of a standard material. The method covers evaluation of the relative quality of subgrade soils but is applicable to sub-base and some base course materials (ICAO). The term is typically used in airfield construction.
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Results shown in Table 1 are obtained by laboratory tests such as Sieve Analysis Hydrometer Analysis Atterberg's Limit Test Specific Gravity Test Modified Compaction Test Unconfined Compression Test and California Bearing Ratio Test to evaluate the changes in important engineering properties of the soils;
Tenders are invited for Conducting Benkleman Beam Test (as per IRC 81) and California Bearing Ratio Test (as per IS-2720, Part-XXXI) and different soil parameters test as per standerd guidelines for Birnagar Aranghata Road from 2.
The California Bearing Ratio of the soils to be encountered at formation level.

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