HET 01060 - CALIFORNIA BEARING RATIO APPARATUS (C.B.R. MACHINE)
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Perforated Metal Weight 2.5 kg. 147mm dia, with 53mm dia soft - Perforated Plate, 148mm dia, with adjustable stem and lock nut
- Metal Tripod for Dial Gauge
- Cutting Collar
- Rammer 2.6kg, 310mm controlled drop
- Rammer 4.9kg, 450mm controlled drop
- Proving Ring Capacity 50 K
- Dial Gauge, 25 mm travel, 0.01mm least count.
CALIFORNIA BEARING RATIO APPARATUS
The CBR test is used for determining the relative bearing ratio and expansion characteristics under known surcharge weights of base, sub-base and sub grade soils for the design of roads, pavements and runways. Tests can be conducted on all types of soils including sand, gravel and washed stone (passing through 20 mm IS Sieve). The CBR test is used extensively in selection of materials and control of sub grades. The procedure consists of loading soil with a circular piston, 50 mm dia face and maintaining a penetration rate of 1.25 mm/min. The load is noted and the results of test on natural or recompacted soils, in soaked and unsoaked conditions, can be compared with standard test results.
The Apparatus Consist of following:-
- Load Frame, 50kn ( 5000 kgf)
- Mould 150mm ID x 175mm high
- Perforated Base Plate
- Extension Collar, 150mm ID x 50mm high
- Penetration Piston, 50mm face dia
- Adjustable Bracket, for Penetration Dial Gauge
- Circular Metal Spacer Disc
- Annular Metal Weight, 2.5kg, 147mm dia with 53 mm dia central hole