Standards: BS 1377:9, BS 1924:2, ASTM D4429, CNR UNI 10009
Used to determine quickly and efficiently the bearing capacity of soils on road constructions, foundations, road subgrades etc.
The CBR test is performed by measuring the pressure required to penetrate a soil sample with a plunger of standard area. The measured pressure is then divided by the pressure required to achieve an equal penetration on a standard crushed rock material. The harder the surface, the higher the CBR value.
The California Bearing Ratio (CBR) field test measures the relative strength of in–situ soils and some base course materials for use in pavement design. The field test procedure uses a loading jack to force a piston into the soil at the test site and comparing the piston load to the depth of penetration. The jack is loaded against dead weights or a heavy piece of equipment such as a loaded dump truck.
The S220 KIT tester comprises:
S221-01 Mechanical jack 50 kN capacity
S370-09 Load ring 40 kN capacity
S212-01 CBR penetration piston
S377 Dial gauge 25x0.01 mm
S212-03 Dial gauge holder
S220-01 Datum bar 1400 mm long; slotted surcharge weights 4.5 and 9 kg and annular 4.5 kg; set of extension rods: 2x100 mm, 1x300, 600, 1000 mm; accessories; wooden carrying case.
Weight: 70 kg approx.