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California Bearing Ratio (Aimil)

The California Bearing Ratio test, (usually called CBR test) is an empirical test developed in California, USA for determining the Relative Bearing Ratio & expansion characteristics under known surcharge weight of base, sub-base and sub grade soils for the design of roads, payments & runways. The CBR test is used extensively in selection of materials & control of sub-grades.

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California Bearing Ratio (Aimil)

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  1. California Bearing Ratio Test The California Bearing Ratio test, (usually called CBR test) is an empirical test developed in California, USA for determining the Relative Bearing Ratio & expansion characteristics under known surcharge weight of base, sub-base and sub grade soils for the design of roads, payments & runways. The CBR test is used extensively in selection of materials & control of subgrades. The test can be performed in the laboratory on prepared samples or in-situ on location. It is important to appreciate that this test, being of an empirical in nature, is valid only for the application for which it was developed i.e., the design of highway base thickness.

  2. Features of California Bearing Test Salient Features of California Bearing Ratio are: • Compact, bench top design • Rapid Platen Adjustment • Complete with stabilizing bar • Options for mechanical or electrical measurement • Suitable for operation on 220V, 50Hz, single phase, AC supply

  3. California Bearing Ratio Test Apparatus This apparatus, mounted on a rolled steel joist cantilevered from the back of the truck or fitted to the underside of a mobile frame, can be used to determine the bearing ratio (generally known as the California Bearing ratio) of soils quickly and efficiently for the evaluation of strengths of sub-grade & bases for roads & runway pavements. This method of testing in-situ, using piston penetration, is useful for determining the load carrying capacity in the field, when the in-place density and water contents are such that the degree of saturation is 80% or greater, when the material is coarse grained and cohesion less so that it is not affected by changes in the water content when the material has been in-place.

  4. Models of California Bearing Ratio Test Apparatus • Laboratory California Bearing Ratio Test Apparatus, Motorised, Three Speed • Laboratory California Bearing Ratio Test Apparatus, Motorised, Two Speed with Mild Steel Moulds • Laboratory California Bearing Ratio Test Apparatus, Motorised, Electronic • Laboratory California Bearing Ratio Test Apparatus, Motorised, Electronics with ‘Geostar’ & ‘DAQ’ For more details visit California Bearing Ratio Test.

  5. “Geostar” the Geotechnical Software for Testing, Analysis & Reporting The analysis & reporting of following Tests can be performed • Unconsolidated Undrained Triaxial Test • Consolidated Undrained Triaxial Test • Consolidated Drained Test • Direct/Residual Shear Test • CBR Test • One Dimensional Consolidation Test These package of software's are supplied as required by the purchaser & are accessed by an activation license supplied by Aimil, allowing the customer to build up a suite of software on an "as required basis" depending upon the need.

  6. Common Features of all the Tests • The software allows selection of British/Indian Standards for analysis as required. • Tests can be performed in SI, Imperial or metric Units. • Clear & Easy to use. Test information is presented on menu driven screen. • The software directly reads the data format for analysis from StarDAQ. • Customisable Report Header/Footer • The inbuilt utilities include Master Unit Converter, Unit Converter Calculator, besides the normal & Scientific system calculators. • Database back up & restore facilities are available. • Complete User activity logging is available.

  7. Features & Graphs available for CBR Analysis Software Special features & graphs available for CBR analysis software: • Manual data entry facility • Find out CBR value in % at 2.5mm & 5mm Penetration • Graph for load vs Penetration (top side, bottom side & both) • Graph correction facility available • Graph expand facility

  8. Contact Us 011-30810200 info@aimil.com Naimex HouseA-8, Mohan Cooperative Industrial Estate,Mathura Road, New Delhi - 110 044 011-26950011 www.aimil.com

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