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CBR Test Apparatus (Field Type)

cbr_test_apparatus_field_type

CBR Test Apparatus (Field Type) (SL-GT-058)
IS 2720 (PART XXXI) 1969.
In recent years it has become important to know C.B.R. values in situ.
It is useful in determining the load carrying capacity in the field when
in place density and water contents are such that the degree of
saturation is 80% of greater, when material is cohesionless and
coarse grained, such that it is not effective by changes in water
contents and when the material has been in place for considerable
the loading is effected by means of a mechanical load frames which
can be fixed to the under side of a truck.
Specification: Mechanical screw loading jack, 10,000 kg. Capacity
with u-bracket and swivel head. Penetration piston, 50mm dia.
Threaded at the upper end. Extension rods consisting of 2 lengths 5
cm. g lengths 10cm. 1 length 30 cm., 1 length 50 cm. and 1 length
100 cm. used as spacers between the proving ring and penetration
piston. The lengths are machined from steel tubing. Connector set,
has eight connectors for coupling the penetration piston and
proving ring assembly either directly or through extension pieces.
Dial gauge support of seamless pipe constructions. It stands 30 cm
high and 45 cm. Wide at the base. Provided with a quick release
screw type clamp capable of sliding and locking anywhere along 2
meter length of the bridge. Supplied with annular metal weight 5
kg., 250mm dia with 53 mm dia central hole, slotted metal weight 5
kg., 215mm to 250mm dia with 53 dia slot 2 nos.

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