California Bearing Ratio Apparatus - 50kn Load Frame, 150mm Id Mould, 50mm Penetration Piston | Advanced Soil Testing For Road Design And Material Selection

The California Bearing Ratio Apparatus 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 re compacted soils, in soaked and uncloaked 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
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 KN
Dial Gauge, 25 mm travel, 0.01mm least count.